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Merge branch '3.0' of https://github.com/taosdata/TDengine into fix/ly_mem_leak

This commit is contained in:
54liuyao 2024-08-19 09:26:37 +08:00
parent 1b654c5a9a 28bcdd30a2
commit 4b8951c3d7
93 changed files with 2868 additions and 1434 deletions
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4
docs/examples/c/connect_example.c
View File

@ -12,11 +12,11 @@ int main() {
uint16_t port = 6030; // 0 means use the default port
TAOS *taos = taos_connect(host, user, passwd, db, port);
if (taos == NULL) {
printf("Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL), taos_errstr(NULL));
fprintf(stderr, "Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL), taos_errstr(NULL));
taos_cleanup();
return -1;
}
printf("Connected to %s:%hu successfully.\n", host, port);
fprintf(stdout, "Connected to %s:%hu successfully.\n", host, port);
/* put your code here for read and write */

16
docs/examples/c/create_db_demo.c
View File

@ -33,7 +33,7 @@ static int DemoCreateDB() {
// connect
TAOS *taos = taos_connect(host, user, password, NULL, port);
if (taos == NULL) {
printf("Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL),
fprintf(stderr, "Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL),
taos_errstr(NULL));
taos_cleanup();
return -1;
@ -43,14 +43,13 @@ static int DemoCreateDB() {
TAOS_RES *result = taos_query(taos, "CREATE DATABASE IF NOT EXISTS power");
code = taos_errno(result);
if (code != 0) {
printf("Failed to create database power, Server: %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, code,
taos_errstr(result));
fprintf(stderr, "Failed to create database power, ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
taos_free_result(result);
printf("Create database power successfully.\n");
fprintf(stdout, "Create database power successfully.\n");
// create table
const char *sql =
@ -59,14 +58,13 @@ static int DemoCreateDB() {
result = taos_query(taos, sql);
code = taos_errno(result);
if (code != 0) {
printf("Failed to create stable power.meters, Server: %s:%hu, ErrCode: 0x%x, ErrMessage: %s\n.", host, port, code,
taos_errstr(result));
fprintf(stderr, "Failed to create stable power.meters, ErrCode: 0x%x, ErrMessage: %s\n.", code, taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
taos_free_result(result);
printf("Create stable power.meters successfully.\n");
fprintf(stdout, "Create stable power.meters successfully.\n");
// close & clean
taos_close(taos);
@ -75,4 +73,6 @@ static int DemoCreateDB() {
// ANCHOR_END: create_db_and_table
}
int main(int argc, char *argv[]) { return DemoCreateDB(); }
int main(int argc, char *argv[]) {
return DemoCreateDB();
}

82
docs/examples/c/insert_data_demo.c
View File

@ -23,50 +23,52 @@
#include "taos.h"
static int DemoInsertData() {
// ANCHOR: insert_data
const char *host = "localhost";
const char *user = "root";
const char *password = "taosdata";
uint16_t port = 6030;
int code = 0;
// ANCHOR: insert_data
const char *host = "localhost";
const char *user = "root";
const char *password = "taosdata";
uint16_t port = 6030;
int code = 0;
// connect
TAOS *taos = taos_connect(host, user, password, NULL, port);
if (taos == NULL) {
printf("Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL), taos_errstr(NULL));
taos_cleanup();
return -1;
}
// connect
TAOS *taos = taos_connect(host, user, password, NULL, port);
if (taos == NULL) {
fprintf(stderr, "Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL),
taos_errstr(NULL));
taos_cleanup();
return -1;
}
// insert data, please make sure the database and table are already created
const char* sql = "INSERT INTO " \
"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') " \
"VALUES " \
"(NOW + 1a, 10.30000, 219, 0.31000) " \
"(NOW + 2a, 12.60000, 218, 0.33000) " \
"(NOW + 3a, 12.30000, 221, 0.31000) " \
"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') " \
"VALUES " \
"(NOW + 1a, 10.30000, 218, 0.25000) ";
TAOS_RES *result = taos_query(taos, sql);
code = taos_errno(result);
if (code != 0) {
printf("Failed to insert data to power.meters, Server: %s:%hu, ErrCode: 0x%x, ErrMessage: %s\n.", host, port, code, taos_errstr(result));
// insert data, please make sure the database and table are already created
const char *sql =
"INSERT INTO "
"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') "
"VALUES "
"(NOW + 1a, 10.30000, 219, 0.31000) "
"(NOW + 2a, 12.60000, 218, 0.33000) "
"(NOW + 3a, 12.30000, 221, 0.31000) "
"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') "
"VALUES "
"(NOW + 1a, 10.30000, 218, 0.25000) ";
TAOS_RES *result = taos_query(taos, sql);
code = taos_errno(result);
if (code != 0) {
fprintf(stderr, "Failed to insert data to power.meters, sql: %s, ErrCode: 0x%x, ErrMessage: %s\n.", sql, code, taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
taos_free_result(result);
// you can check affectedRows here
int rows = taos_affected_rows(result);
fprintf(stdout, "Successfully inserted %d rows into power.meters.\n", rows);
// close & clean
taos_close(taos);
taos_cleanup();
return -1;
}
taos_free_result(result);
// you can check affectedRows here
int rows = taos_affected_rows(result);
printf("Successfully inserted %d rows into power.meters.\n", rows);
// close & clean
taos_close(taos);
taos_cleanup();
return 0;
// ANCHOR_END: insert_data
return 0;
// ANCHOR_END: insert_data
}
int main(int argc, char *argv[]) {

89
docs/examples/c/query_data_demo.c
View File

@ -22,59 +22,56 @@
#include <string.h>
#include "taos.h"
static int DemoQueryData() {
// ANCHOR: query_data
const char *host = "localhost";
const char *user = "root";
const char *password = "taosdata";
uint16_t port = 6030;
int code = 0;
// ANCHOR: query_data
const char *host = "localhost";
const char *user = "root";
const char *password = "taosdata";
uint16_t port = 6030;
int code = 0;
// connect
TAOS *taos = taos_connect(host, user, password, NULL, port);
if (taos == NULL) {
printf("Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL), taos_errstr(NULL));
taos_cleanup();
return -1;
}
// connect
TAOS *taos = taos_connect(host, user, password, NULL, port);
if (taos == NULL) {
fprintf(stderr, "Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL),
taos_errstr(NULL));
taos_cleanup();
return -1;
}
// query data, please make sure the database and table are already created
const char *sql = "SELECT ts, current, location FROM power.meters limit 100";
TAOS_RES *result = taos_query(taos, sql);
code = taos_errno(result);
if (code != 0) {
fprintf(stderr, "Failed to query data from power.meters, sql: %s, ErrCode: 0x%x, ErrMessage: %s\n.", sql, code,
taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
TAOS_ROW row = NULL;
int rows = 0;
int num_fields = taos_field_count(result);
TAOS_FIELD *fields = taos_fetch_fields(result);
// query data, please make sure the database and table are already created
const char* sql = "SELECT ts, current, location FROM power.meters limit 100";
TAOS_RES *result = taos_query(taos, sql);
code = taos_errno(result);
if (code != 0) {
printf("Failed to query data from power.meters, Server: %s:%hu, ErrCode: 0x%x, ErrMessage: %s\n.", host, port, code, taos_errstr(result));
fprintf(stdout, "query successfully, got %d fields, the sql is: %s.\n", num_fields, sql);
// fetch the records row by row
while ((row = taos_fetch_row(result))) {
// Add your data processing logic here
rows++;
}
fprintf(stdout, "total rows: %d\n", rows);
taos_free_result(result);
// close & clean
taos_close(taos);
taos_cleanup();
return -1;
}
TAOS_ROW row = NULL;
int rows = 0;
int num_fields = taos_field_count(result);
TAOS_FIELD *fields = taos_fetch_fields(result);
printf("fields: %d\n", num_fields);
printf("sql: %s, result:\n", sql);
// fetch the records row by row
while ((row = taos_fetch_row(result))) {
char temp[1024] = {0};
rows++;
taos_print_row(temp, row, fields, num_fields);
printf("%s\n", temp);
}
printf("total rows: %d\n", rows);
taos_free_result(result);
// close & clean
taos_close(taos);
taos_cleanup();
return 0;
// ANCHOR_END: query_data
return 0;
// ANCHOR_END: query_data
}
int main(int argc, char *argv[]) {

193
docs/examples/c/sml_insert_demo.c
View File

@ -21,112 +21,119 @@
#include <string.h>
#include "taos.h"
static int DemoSmlInsert() {
// ANCHOR: schemaless
const char *host = "localhost";
const char *user = "root";
const char *password = "taosdata";
uint16_t port = 6030;
int code = 0;
// ANCHOR: schemaless
const char *host = "localhost";
const char *user = "root";
const char *password = "taosdata";
uint16_t port = 6030;
int code = 0;
// connect
TAOS *taos = taos_connect(host, user, password, NULL, port);
if (taos == NULL) {
printf("Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL), taos_errstr(NULL));
taos_cleanup();
return -1;
}
// connect
TAOS *taos = taos_connect(host, user, password, NULL, port);
if (taos == NULL) {
fprintf(stderr, "Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL),
taos_errstr(NULL));
taos_cleanup();
return -1;
}
// create database
TAOS_RES *result = taos_query(taos, "CREATE DATABASE IF NOT EXISTS power");
code = taos_errno(result);
if (code != 0) {
printf("Failed to create database power, Server: %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, code, taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
taos_free_result(result);
printf("Create database power successfully.\n");
// create database
TAOS_RES *result = taos_query(taos, "CREATE DATABASE IF NOT EXISTS power");
code = taos_errno(result);
if (code != 0) {
fprintf(stderr, "Failed to create database power, ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
taos_free_result(result);
// use database
result = taos_query(taos, "USE power");
code = taos_errno(result);
if (code != 0) {
printf("Failed to execute use power, Server: %s:%hu, ErrCode: 0x%x, ErrMessage: %s\n.", host, port, code, taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
taos_free_result(result);
// use database
result = taos_query(taos, "USE power");
code = taos_errno(result);
if (code != 0) {
fprintf(stderr, "Failed to execute use power, ErrCode: 0x%x, ErrMessage: %s\n.", code, taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
taos_free_result(result);
// schemaless demo data
char * line_demo = "meters,groupid=2,location=California.SanFrancisco current=10.3000002f64,voltage=219i32,phase=0.31f64 1626006833639";
char * telnet_demo = "metric_telnet 1707095283260 4 host=host0 interface=eth0";
char * json_demo = "{\"metric\": \"metric_json\",\"timestamp\": 1626846400,\"value\": 10.3, \"tags\": {\"groupid\": 2, \"location\": \"California.SanFrancisco\", \"id\": \"d1001\"}}";
// schemaless demo data
char *line_demo =
"meters,groupid=2,location=California.SanFrancisco current=10.3000002f64,voltage=219i32,phase=0.31f64 "
"1626006833639";
char *telnet_demo = "metric_telnet 1707095283260 4 host=host0 interface=eth0";
char *json_demo =
"{\"metric\": \"metric_json\",\"timestamp\": 1626846400,\"value\": 10.3, \"tags\": {\"groupid\": 2, "
"\"location\": \"California.SanFrancisco\", \"id\": \"d1001\"}}";
// influxdb line protocol
char *lines[] = {line_demo};
result = taos_schemaless_insert(taos, lines, 1, TSDB_SML_LINE_PROTOCOL, TSDB_SML_TIMESTAMP_MILLI_SECONDS);
code = taos_errno(result);
if (code != 0) {
printf("Failed to insert schemaless line data, Server: %s:%hu, ErrCode: 0x%x, ErrMessage: %s\n.", host, port, code, taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
// influxdb line protocol
char *lines[] = {line_demo};
result = taos_schemaless_insert(taos, lines, 1, TSDB_SML_LINE_PROTOCOL, TSDB_SML_TIMESTAMP_MILLI_SECONDS);
code = taos_errno(result);
if (code != 0) {
fprintf(stderr, "Failed to insert schemaless line data, data: %s, ErrCode: 0x%x, ErrMessage: %s\n.", line_demo, code,
taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
int rows = taos_affected_rows(result);
printf("Insert %d rows of schemaless line data successfully.\n", rows);
taos_free_result(result);
int rows = taos_affected_rows(result);
fprintf(stdout, "Insert %d rows of schemaless line data successfully.\n", rows);
taos_free_result(result);
// opentsdb telnet protocol
char *telnets[] = {telnet_demo};
result = taos_schemaless_insert(taos, telnets, 1, TSDB_SML_TELNET_PROTOCOL, TSDB_SML_TIMESTAMP_MILLI_SECONDS);
code = taos_errno(result);
if (code != 0) {
printf("Failed to insert schemaless telnet data, Server: %s:%hu, ErrCode: 0x%x, ErrMessage: %s\n.", host, port, code, taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
// opentsdb telnet protocol
char *telnets[] = {telnet_demo};
result = taos_schemaless_insert(taos, telnets, 1, TSDB_SML_TELNET_PROTOCOL, TSDB_SML_TIMESTAMP_MILLI_SECONDS);
code = taos_errno(result);
if (code != 0) {
fprintf(stderr, "Failed to insert schemaless telnet data, data: %s, ErrCode: 0x%x, ErrMessage: %s\n.", telnet_demo, code,
taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
rows = taos_affected_rows(result);
printf("Insert %d rows of schemaless telnet data successfully.\n", rows);
taos_free_result(result);
rows = taos_affected_rows(result);
fprintf(stdout, "Insert %d rows of schemaless telnet data successfully.\n", rows);
taos_free_result(result);
// opentsdb json protocol
char *jsons[1] = {0};
// allocate memory for json data. can not use static memory.
jsons[0] = malloc(1024);
if (jsons[0] == NULL) {
printf("Failed to allocate memory\n");
taos_close(taos);
taos_cleanup();
return -1;
}
(void)strncpy(jsons[0], json_demo, 1023);
result = taos_schemaless_insert(taos, jsons, 1, TSDB_SML_JSON_PROTOCOL, TSDB_SML_TIMESTAMP_NOT_CONFIGURED);
code = taos_errno(result);
if (code != 0) {
// opentsdb json protocol
char *jsons[1] = {0};
// allocate memory for json data. can not use static memory.
size_t size = 1024;
jsons[0] = malloc(size);
if (jsons[0] == NULL) {
fprintf(stderr, "Failed to allocate memory: %zu bytes.\n", size);
taos_close(taos);
taos_cleanup();
return -1;
}
(void)strncpy(jsons[0], json_demo, 1023);
result = taos_schemaless_insert(taos, jsons, 1, TSDB_SML_JSON_PROTOCOL, TSDB_SML_TIMESTAMP_NOT_CONFIGURED);
code = taos_errno(result);
if (code != 0) {
free(jsons[0]);
fprintf(stderr, "Failed to insert schemaless json data, Server: %s, ErrCode: 0x%x, ErrMessage: %s\n.", json_demo, code,
taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
free(jsons[0]);
printf("Failed to insert schemaless json data, Server: %s:%hu, ErrCode: 0x%x, ErrMessage: %s\n.", host, port, code, taos_errstr(result));
rows = taos_affected_rows(result);
fprintf(stdout, "Insert %d rows of schemaless json data successfully.\n", rows);
taos_free_result(result);
// close & clean
taos_close(taos);
taos_cleanup();
return -1;
}
free(jsons[0]);
rows = taos_affected_rows(result);
printf("Insert %d rows of schemaless json data successfully.\n", rows);
taos_free_result(result);
// close & clean
taos_close(taos);
taos_cleanup();
return 0;
// ANCHOR_END: schemaless
return 0;
// ANCHOR_END: schemaless
}
int main(int argc, char *argv[]) {

10
docs/examples/c/stmt_insert_demo.c
View File

@ -32,7 +32,7 @@ void executeSQL(TAOS *taos, const char *sql) {
TAOS_RES *res = taos_query(taos, sql);
int code = taos_errno(res);
if (code != 0) {
printf("%s\n", taos_errstr(res));
fprintf(stderr, "%s\n", taos_errstr(res));
taos_free_result(res);
taos_close(taos);
exit(EXIT_FAILURE);
@ -49,7 +49,7 @@ void executeSQL(TAOS *taos, const char *sql) {
*/
void checkErrorCode(TAOS_STMT *stmt, int code, const char *msg) {
if (code != 0) {
printf("%s. code: %d, error: %s\n", msg,code,taos_stmt_errstr(stmt));
fprintf(stderr, "%s. code: %d, error: %s\n", msg,code,taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
exit(EXIT_FAILURE);
}
@ -74,7 +74,7 @@ void insertData(TAOS *taos) {
// init
TAOS_STMT *stmt = taos_stmt_init(taos);
if (stmt == NULL) {
printf("Failed to init taos_stmt, error: %s\n", taos_stmt_errstr(NULL));
fprintf(stderr, "Failed to init taos_stmt, error: %s\n", taos_stmt_errstr(NULL));
exit(EXIT_FAILURE);
}
// prepare
@ -159,7 +159,7 @@ void insertData(TAOS *taos) {
int affected = taos_stmt_affected_rows_once(stmt);
total_affected += affected;
}
printf("Successfully inserted %d rows to power.meters.\n", total_affected);
fprintf(stdout, "Successfully inserted %d rows to power.meters.\n", total_affected);
taos_stmt_close(stmt);
}
@ -170,7 +170,7 @@ int main() {
uint16_t port = 6030;
TAOS *taos = taos_connect(host, user, password, NULL, port);
if (taos == NULL) {
printf("Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL), taos_errstr(NULL));
fprintf(stderr, "Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL), taos_errstr(NULL));
taos_cleanup();
exit(EXIT_FAILURE);
}

217
docs/examples/c/tmq_demo.c
View File

@ -26,6 +26,7 @@
volatile int thread_stop = 0;
static int running = 1;
static int count = 0;
const char* topic_name = "topic_meters";
typedef struct {
@ -40,13 +41,25 @@ typedef struct {
const char* auto_offset_reset;
} ConsumerConfig;
ConsumerConfig config = {
.enable_auto_commit = "true",
.auto_commit_interval_ms = "1000",
.group_id = "group1",
.client_id = "client1",
.td_connect_host = "localhost",
.td_connect_port = "6030",
.td_connect_user = "root",
.td_connect_pass = "taosdata",
.auto_offset_reset = "latest"
};
void* prepare_data(void* arg) {
const char *host = "localhost";
const char *user = "root";
const char *password = "taosdata";
uint16_t port = 6030;
int code = 0;
TAOS *pConn = taos_connect(host, user, password, NULL, port);
const char* host = "localhost";
const char* user = "root";
const char* password = "taosdata";
uint16_t port = 6030;
int code = 0;
TAOS* pConn = taos_connect(host, user, password, NULL, port);
if (pConn == NULL) {
fprintf(stderr, "Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL), taos_errstr(NULL));
taos_cleanup();
@ -78,62 +91,46 @@ void* prepare_data(void* arg) {
}
// ANCHOR: msg_process
static int32_t msg_process(TAOS_RES* msg) {
char buf[1024]; // buf to store the row content
int32_t msg_process(TAOS_RES* msg) {
int32_t rows = 0;
const char* topicName = tmq_get_topic_name(msg);
const char* dbName = tmq_get_db_name(msg);
int32_t vgroupId = tmq_get_vgroup_id(msg);
const char* dbName = tmq_get_db_name(msg);
int32_t vgroupId = tmq_get_vgroup_id(msg);
fprintf(stdout, "topic: %s\n", topicName);
fprintf(stdout, "db: %s\n", dbName);
fprintf(stdout, "vgroup id: %d\n", vgroupId);
while (1) {
while (true) {
// get one row data from message
TAOS_ROW row = taos_fetch_row(msg);
if (row == NULL) break;
// get the field information
TAOS_FIELD* fields = taos_fetch_fields(msg);
// get the number of fields
int32_t numOfFields = taos_field_count(msg);
// get the precision of the result
int32_t precision = taos_result_precision(msg);
// Add your data processing logic here
rows++;
// print the row content
if (taos_print_row(buf, row, fields, numOfFields) < 0) {
fprintf(stderr, "Failed to print row\n");
break;
}
// print the precision and row content to the console
fprintf(stdout, "precision: %d, data: %s\n", precision, buf);
}
return rows;
}
// ANCHOR_END: msg_process
static int32_t init_env() {
const char *host = "localhost";
const char *user = "root";
const char *password = "taosdata";
uint16_t port = 6030;
int code = 0;
TAOS *pConn = taos_connect(host, user, password, NULL, port);
TAOS* init_env() {
const char* host = "localhost";
const char* user = "root";
const char* password = "taosdata";
uint16_t port = 6030;
int code = 0;
TAOS* pConn = taos_connect(host, user, password, NULL, port);
if (pConn == NULL) {
fprintf(stderr, "Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL), taos_errstr(NULL));
taos_cleanup();
return -1;
return NULL;
}
TAOS_RES* pRes;
// drop database if exists
fprintf(stdout, "Create database.\n");
pRes = taos_query(pConn, "DROP TOPIC IF EXISTS topic_meters");
code = taos_errno(pRes);
if (code != 0) {
fprintf(stderr, "Failed to drop topic_meters, ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_errstr(pRes));
goto END;
}
taos_free_result(pRes);
@ -141,6 +138,7 @@ static int32_t init_env() {
code = taos_errno(pRes);
if (code != 0) {
fprintf(stderr, "Failed to drop database power, ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_errstr(pRes));
goto END;
}
taos_free_result(pRes);
@ -148,13 +146,12 @@ static int32_t init_env() {
pRes = taos_query(pConn, "CREATE DATABASE power PRECISION 'ms' WAL_RETENTION_PERIOD 3600");
code = taos_errno(pRes);
if (code != 0) {
fprintf(stderr, "Failed to create tmqdb, ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_errstr(pRes));
fprintf(stderr, "Failed to create power, ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_errstr(pRes));
goto END;
}
taos_free_result(pRes);
// create super table
fprintf(stdout, "Create super table.\n");
pRes = taos_query(
pConn,
"CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS "
@ -164,56 +161,78 @@ static int32_t init_env() {
fprintf(stderr, "Failed to create super table meters, ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_errstr(pRes));
goto END;
}
taos_free_result(pRes);
taos_close(pConn);
return 0;
return pConn;
END:
taos_free_result(pRes);
taos_close(pConn);
return -1;
return NULL;
}
int32_t create_topic() {
fprintf(stdout, "Create topic.\n");
TAOS_RES* pRes;
const char *host = "localhost";
const char *user = "root";
const char *password = "taosdata";
uint16_t port = 6030;
int code = 0;
TAOS *pConn = taos_connect(host, user, password, NULL, port);
if (pConn == NULL) {
fprintf(stderr, "Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL), taos_errstr(NULL));
taos_cleanup();
void deinit_env(TAOS* pConn) {
if (pConn)
taos_close(pConn);
}
int32_t create_topic(TAOS* pConn) {
TAOS_RES* pRes;
int code = 0;
if (!pConn) {
fprintf(stderr, "Invalid input parameter.\n");
return -1;
}
pRes = taos_query(pConn, "USE POWER");
pRes = taos_query(pConn, "USE power");
code = taos_errno(pRes);
if (taos_errno(pRes) != 0) {
fprintf(stderr, "Failed to use tmqdb, ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_errstr(pRes));
fprintf(stderr, "Failed to use power, ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_errstr(pRes));
return -1;
}
taos_free_result(pRes);
pRes = taos_query(
pConn,
"CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM meters");
pRes = taos_query(pConn, "CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM meters");
code = taos_errno(pRes);
if (code != 0) {
fprintf(stderr, "Failed to create topic topic_meters, ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_errstr(pRes));
return -1;
}
taos_free_result(pRes);
return 0;
}
taos_close(pConn);
int32_t drop_topic(TAOS* pConn) {
TAOS_RES* pRes;
int code = 0;
if (!pConn) {
fprintf(stderr, "Invalid input parameter.\n");
return -1;
}
pRes = taos_query(pConn, "USE power");
code = taos_errno(pRes);
if (taos_errno(pRes) != 0) {
fprintf(stderr, "Failed to use power, ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_errstr(pRes));
return -1;
}
taos_free_result(pRes);
pRes = taos_query(pConn, "DROP TOPIC IF EXISTS topic_meters");
code = taos_errno(pRes);
if (code != 0) {
fprintf(stderr, "Failed to drop topic topic_meters, ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_errstr(pRes));
return -1;
}
taos_free_result(pRes);
return 0;
}
void tmq_commit_cb_print(tmq_t* tmq, int32_t code, void* param) {
fprintf(stdout, "tmq_commit_cb_print() code: %d, tmq: %p, param: %p\n", code, tmq, param);
count +=1;
fprintf(stdout, "tmq_commit_cb_print() code: %d, tmq: %p, param: %p, count: %d.\n", code, tmq, param, count);
}
// ANCHOR: create_consumer_1
@ -288,14 +307,14 @@ _end:
tmq_list_t* build_topic_list() {
// create a empty topic list
tmq_list_t* topicList = tmq_list_new();
const char* topic_name = "topic_meters";
// append topic name to the list
int32_t code = tmq_list_append(topicList, topic_name);
if (code) {
// if failed, destroy the list and return NULL
tmq_list_destroy(topicList);
fprintf(stderr, "Failed to create topic_list, ErrCode: 0x%x, ErrMessage: %s.\n", code, tmq_err2str(code));
fprintf(stderr, "Failed to create topic_list, topic: %s, groupId: %s, clientId: %s, ErrCode: 0x%x, ErrMessage: %s.\n",
topic_name, config.group_id, config.client_id, code, tmq_err2str(code));
return NULL;
}
// if success, return the list
@ -314,8 +333,10 @@ void basic_consume_loop(tmq_t* tmq) {
TAOS_RES* tmqmsg = tmq_consumer_poll(tmq, timeout);
if (tmqmsg) {
msgCnt++;
// process the message
// Add your data processing logic here
totalRows += msg_process(tmqmsg);
// free the message
taos_free_result(tmqmsg);
}
@ -326,7 +347,7 @@ void basic_consume_loop(tmq_t* tmq) {
}
// print the result: total messages and total rows consumed
fprintf(stderr, "%d msg consumed, include %d rows\n", msgCnt, totalRows);
fprintf(stdout, "%d msg consumed, include %d rows\n", msgCnt, totalRows);
}
// ANCHOR_END: basic_consume_loop
@ -338,7 +359,8 @@ void consume_repeatly(tmq_t* tmq) {
// get the topic assignment
int32_t code = tmq_get_topic_assignment(tmq, topic_name, &pAssign, &numOfAssignment);
if (code != 0 || pAssign == NULL || numOfAssignment == 0) {
fprintf(stderr, "Failed to get assignment, ErrCode: 0x%x, ErrMessage: %s.\n", code, tmq_err2str(code));
fprintf(stderr, "Failed to get assignment, topic: %s, groupId: %s, clientId: %s, ErrCode: 0x%x, ErrMessage: %s.\n",
topic_name, config.group_id, config.client_id, code, tmq_err2str(code));
return;
}
@ -348,11 +370,13 @@ void consume_repeatly(tmq_t* tmq) {
code = tmq_offset_seek(tmq, topic_name, p->vgId, p->begin);
if (code != 0) {
fprintf(stderr, "Failed to seek assignment %d to beginning %ld, ErrCode: 0x%x, ErrMessage: %s.\n", i, p->begin, code, tmq_err2str(code));
} else {
fprintf(stdout, "Seek assignment %d to beginning %ld successfully.\n", i, p->begin);
fprintf(stderr, "Failed to seek offset, topic: %s, groupId: %s, clientId: %s, vgId: %d, ErrCode: 0x%x, ErrMessage: %s.\n",
topic_name, config.group_id, config.client_id, p->vgId, code, tmq_err2str(code));
break;
}
}
if (code == 0)
fprintf(stdout, "Assignment seek to beginning successfully.\n");
// free the assignment array
tmq_free_assignment(pAssign);
@ -377,9 +401,9 @@ void manual_commit(tmq_t* tmq) {
totalRows += msg_process(tmqmsg);
// commit the message
int32_t code = tmq_commit_sync(tmq, tmqmsg);
if (code) {
fprintf(stderr, "Failed to commit message, ErrCode: 0x%x, ErrMessage: %s.\n", code, tmq_err2str(code));
fprintf(stderr, "Failed to commit offset, topic: %s, groupId: %s, clientId: %s, ErrCode: 0x%x, ErrMessage: %s.\n",
topic_name, config.group_id, config.client_id, code, tmq_err2str(code));
// free the message
taos_free_result(tmqmsg);
break;
@ -396,7 +420,7 @@ void manual_commit(tmq_t* tmq) {
}
// print the result: total messages and total rows consumed
fprintf(stderr, "%d msg consumed, include %d rows.\n", msgCnt, totalRows);
fprintf(stdout, "%d msg consumed, include %d rows.\n", msgCnt, totalRows);
}
// ANCHOR_END: manual_commit
@ -404,11 +428,14 @@ int main(int argc, char* argv[]) {
int32_t code;
pthread_t thread_id;
if (init_env() < 0) {
TAOS* pConn = init_env();
if (pConn == NULL) {
fprintf(stderr, "Failed to init env.\n");
return -1;
}
if (create_topic() < 0) {
if (create_topic(pConn) < 0) {
fprintf(stderr, "Failed to create topic.\n");
return -1;
}
@ -417,25 +444,15 @@ int main(int argc, char* argv[]) {
return -1;
}
ConsumerConfig config = {
.enable_auto_commit = "true",
.auto_commit_interval_ms = "1000",
.group_id = "group1",
.client_id = "client1",
.td_connect_host = "localhost",
.td_connect_port = "6030",
.td_connect_user = "root",
.td_connect_pass = "taosdata",
.auto_offset_reset = "latest"
};
// ANCHOR: create_consumer_2
tmq_t* tmq = build_consumer(&config);
if (NULL == tmq) {
fprintf(stderr, "Failed to create native consumer, host: %s, groupId: %s, , clientId: %s.\n", config.td_connect_host, config.group_id, config.client_id);
fprintf(stderr, "Failed to create native consumer, host: %s, groupId: %s, , clientId: %s.\n",
config.td_connect_host, config.group_id, config.client_id);
return -1;
} else {
fprintf(stdout, "Create consumer successfully, host: %s, groupId: %s, , clientId: %s.\n", config.td_connect_host, config.group_id, config.client_id);
fprintf(stdout, "Create consumer successfully, host: %s, groupId: %s, clientId: %s.\n",
config.td_connect_host, config.group_id, config.client_id);
}
// ANCHOR_END: create_consumer_2
@ -443,12 +460,14 @@ int main(int argc, char* argv[]) {
// ANCHOR: subscribe_3
tmq_list_t* topic_list = build_topic_list();
if (NULL == topic_list) {
fprintf(stderr, "Failed to create topic_list.\n");
fprintf(stderr, "Failed to create topic_list, topic: %s, groupId: %s, clientId: %s.\n",
topic_name, config.group_id, config.client_id);
return -1;
}
if ((code = tmq_subscribe(tmq, topic_list))) {
fprintf(stderr, "Failed to subscribe topic_list, ErrCode: 0x%x, ErrMessage: %s.\n", code, tmq_err2str(code));
fprintf(stderr, "Failed to subscribe topic_list, topic: %s, groupId: %s, clientId: %s, ErrCode: 0x%x, ErrMessage: %s.\n",
topic_name, config.group_id, config.client_id, code, tmq_err2str(code));
} else {
fprintf(stdout, "Subscribe topics successfully.\n");
}
@ -466,22 +485,30 @@ int main(int argc, char* argv[]) {
// unsubscribe the topic
code = tmq_unsubscribe(tmq);
if (code) {
fprintf(stderr, "Failed to unsubscribe consumer, ErrCode: 0x%x, ErrMessage: %s.\n", code, tmq_err2str(code));
fprintf(stderr, "Failed to unsubscribe consumer, topic: %s, groupId: %s, clientId: %s, ErrCode: 0x%x, ErrMessage: %s.\n",
topic_name, config.group_id, config.client_id, code, tmq_err2str(code));
} else {
fprintf(stderr, "Consumer unsubscribed successfully.\n");
fprintf(stdout, "Consumer unsubscribed successfully.\n");
}
// close the consumer
code = tmq_consumer_close(tmq);
if (code) {
fprintf(stderr, "Failed to close consumer: %s.\n", tmq_err2str(code));
fprintf(stderr, "Failed to close consumer, topic: %s, groupId: %s, clientId: %s, ErrCode: 0x%x, ErrMessage: %s.\n",
topic_name, config.group_id, config.client_id, code, tmq_err2str(code));
} else {
fprintf(stderr, "Consumer closed successfully.\n");
fprintf(stdout, "Consumer closed successfully.\n");
}
// ANCHOR_END: unsubscribe_and_close
thread_stop = 1;
pthread_join(thread_id, NULL);
if (drop_topic(pConn) < 0) {
fprintf(stderr, "Failed to drop topic.\n");
return -1;
}
deinit_env(pConn);
return 0;
}

91
docs/examples/c/with_reqid_demo.c
View File

@ -23,59 +23,56 @@
#include "taos.h"
static int DemoWithReqId() {
// ANCHOR: with_reqid
const char *host = "localhost";
const char *user = "root";
const char *password = "taosdata";
uint16_t port = 6030;
int code = 0;
// ANCHOR: with_reqid
const char *host = "localhost";
const char *user = "root";
const char *password = "taosdata";
uint16_t port = 6030;
int code = 0;
// connect
TAOS *taos = taos_connect(host, user, password, NULL, port);
if (taos == NULL) {
printf("Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL), taos_errstr(NULL));
taos_cleanup();
return -1;
}
// connect
TAOS *taos = taos_connect(host, user, password, NULL, port);
if (taos == NULL) {
fprintf(stderr, "Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL), taos_errstr(NULL));
taos_cleanup();
return -1;
}
const char *sql = "SELECT ts, current, location FROM power.meters limit 1";
// query data with reqid
long reqid = 3L;
TAOS_RES *result = taos_query_with_reqid(taos, sql, reqid);
code = taos_errno(result);
if (code != 0) {
printf("Failed to execute sql with reqId: %ld, Server: %s:%hu, ErrCode: 0x%x, ErrMessage: %s\n.", reqid, host, port, code, taos_errstr(result));
const char *sql = "SELECT ts, current, location FROM power.meters limit 1";
// query data with reqid
long reqid = 3L;
TAOS_RES *result = taos_query_with_reqid(taos, sql, reqid);
code = taos_errno(result);
if (code != 0) {
fprintf(stderr, "Failed to execute sql with reqId: %ld, ErrCode: 0x%x, ErrMessage: %s\n.", reqid, code, taos_errstr(result));
taos_close(taos);
taos_cleanup();
return -1;
}
TAOS_ROW row = NULL;
int rows = 0;
int num_fields = taos_field_count(result);
TAOS_FIELD *fields = taos_fetch_fields(result);
fprintf(stdout, "query successfully, got %d fields, the sql is: %s.\n", num_fields, sql);
// fetch the records row by row
while ((row = taos_fetch_row(result))) {
// Add your data processing logic here
rows++;
}
fprintf(stdout, "total rows: %d\n", rows);
taos_free_result(result);
// close & clean
taos_close(taos);
taos_cleanup();
return -1;
}
TAOS_ROW row = NULL;
int rows = 0;
int num_fields = taos_field_count(result);
TAOS_FIELD *fields = taos_fetch_fields(result);
printf("fields: %d\n", num_fields);
printf("sql: %s, result:\n", sql);
// fetch the records row by row
while ((row = taos_fetch_row(result))) {
char temp[1024] = {0};
rows++;
taos_print_row(temp, row, fields, num_fields);
printf("%s\n", temp);
}
printf("total rows: %d\n", rows);
taos_free_result(result);
// close & clean
taos_close(taos);
taos_cleanup();
return 0;
// ANCHOR_END: with_reqid
return 0;
// ANCHOR_END: with_reqid
}
int main(int argc, char *argv[]) {
return DemoWithReqId();
}

6
docs/examples/csharp/nativesml/Program.cs
View File

@ -42,16 +42,16 @@ namespace TDengineExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to insert data with schemaless; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to insert data with schemaless, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to insert data with schemaless; Err:" + e.Message);
Console.WriteLine("Failed to insert data with schemaless, ErrMessage:" + e.Message);
throw;
}
}
// ANCHOR_END: main
}
}
}

6
docs/examples/csharp/stmtInsert/Program.cs
View File

@ -62,16 +62,16 @@ namespace TDengineExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to insert to table meters using stmt, url: " + connectionString + "; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to insert to table meters using stmt, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to insert to table meters using stmt, url: " + connectionString + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to insert to table meters using stmt, ErrMessage: " + e.Message);
throw;
}
}
// ANCHOR_END: main
}
}
}

116
docs/examples/csharp/subscribe/Program.cs
View File

@ -6,6 +6,11 @@ namespace TMQExample
{
internal class SubscribeDemo
{
private static string _host = "";
private static string _groupId = "";
private static string _clientId = "";
private static string _topic = "";
public static void Main(string[] args)
{
try
@ -64,9 +69,9 @@ namespace TMQExample
{
// ANCHOR: create_consumer
// consumer config
var host = "127.0.0.1";
var groupId = "group1";
var clientId = "client1";
_host = "127.0.0.1";
_groupId = "group1";
_clientId = "client1";
var cfg = new Dictionary<string, string>()
{
{ "td.connect.port", "6030" },
@ -74,9 +79,9 @@ namespace TMQExample
{ "msg.with.table.name", "true" },
{ "enable.auto.commit", "true" },
{ "auto.commit.interval.ms", "1000" },
{ "group.id", groupId },
{ "client.id", clientId },
{ "td.connect.ip", host },
{ "group.id", _groupId },
{ "client.id", _clientId },
{ "td.connect.ip", _host },
{ "td.connect.user", "root" },
{ "td.connect.pass", "taosdata" },
};
@ -85,20 +90,33 @@ namespace TMQExample
{
// create consumer
consumer = new ConsumerBuilder<Dictionary<string, object>>(cfg).Build();
Console.WriteLine("Create consumer successfully, host: " + host + ", groupId: " + groupId +
", clientId: " + clientId);
Console.WriteLine(
$"Create consumer successfully, " +
$"host: {_host}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}");
}
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to create native consumer, host : " + host + "; ErrCode:" + e.Code +
"; ErrMessage: " + e.Error);
Console.WriteLine(
$"Failed to create native consumer, " +
$"host: {_host}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"ErrCode: {e.Code}, " +
$"ErrMessage: {e.Error}");
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to create native consumer, host : " + host + "; ErrMessage: " + e.Message);
Console.WriteLine(
$"Failed to create native consumer, " +
$"host: {_host}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"ErrMessage: {e.Message}");
throw;
}
@ -109,11 +127,12 @@ namespace TMQExample
static void Consume(IConsumer<Dictionary<string, object>> consumer)
{
// ANCHOR: subscribe
_topic = "topic_meters";
try
{
// subscribe
consumer.Subscribe(new List<string>() { "topic_meters" });
Console.WriteLine("subscribe topics successfully");
consumer.Subscribe(new List<string>() { _topic });
Console.WriteLine("Subscribe topics successfully");
for (int i = 0; i < 50; i++)
{
// consume message with using block to ensure the result is disposed
@ -133,13 +152,24 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to poll data; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine(
$"Failed to poll data, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"ErrCode: {e.Code}, " +
$"ErrMessage: {e.Error}");
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to poll data; ErrMessage:" + e.Message);
Console.WriteLine(
$"Failed to poll data, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"ErrMessage: {e.Message}");
throw;
}
// ANCHOR_END: subscribe
@ -152,24 +182,38 @@ namespace TMQExample
{
// get assignment
var assignment = consumer.Assignment;
Console.WriteLine($"now assignment: {assignment}");
Console.WriteLine($"Now assignment: {assignment}");
// seek to the beginning
foreach (var topicPartition in assignment)
{
consumer.Seek(new TopicPartitionOffset(topicPartition.Topic, topicPartition.Partition, 0));
}
Console.WriteLine("Assignment seek to beginning successfully");
}
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Seek example failed; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine(
$"Failed to seek offset, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"offset: 0, " +
$"ErrCode: {e.Code}, " +
$"ErrMessage: {e.Error}");
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Seek example failed; ErrMessage: " + e.Message);
Console.WriteLine(
$"Failed to seek offset, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"offset: 0, " +
$"ErrMessage: {e.Message}");
throw;
}
// ANCHOR_END: seek
@ -180,6 +224,7 @@ namespace TMQExample
// ANCHOR: commit_offset
for (int i = 0; i < 5; i++)
{
TopicPartitionOffset topicPartitionOffset = null;
try
{
// consume message with using block to ensure the result is disposed
@ -187,9 +232,10 @@ namespace TMQExample
{
if (cr == null) continue;
// commit offset
topicPartitionOffset = cr.TopicPartitionOffset;
consumer.Commit(new List<TopicPartitionOffset>
{
cr.TopicPartitionOffset,
topicPartitionOffset,
});
Console.WriteLine("Commit offset manually successfully.");
}
@ -197,13 +243,26 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to execute consumer functions. ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine(
$"Failed to commit offset, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"offset: {topicPartitionOffset}, " +
$"ErrCode: {e.Code}, " +
$"ErrMessage: {e.Error}");
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to execute consumer functions. ErrMessage:" + e.Message);
Console.WriteLine(
$"Failed to commit offset, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"offset: {topicPartitionOffset}, " +
$"ErrMessage: {e.Message}");
throw;
}
}
@ -221,13 +280,24 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to unsubscribe consumer. ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine(
$"Failed to unsubscribe consumer, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"ErrCode: {e.Code}, " +
$"ErrMessage: {e.Error}");
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to unsubscribe consumer. Err: " + e.Message);
Console.WriteLine(
$"Failed to execute commit example, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"ErrMessage: {e.Message}");
throw;
}
finally

69
docs/examples/csharp/wsInsert/Program.cs
View File

@ -16,10 +16,10 @@ namespace Examples
var builder = new ConnectionStringBuilder(connectionString);
using (var client = DbDriver.Open(builder))
{
CreateDatabaseAndTable(client,connectionString);
InsertData(client,connectionString);
QueryData(client,connectionString);
QueryWithReqId(client,connectionString);
CreateDatabaseAndTable(client, connectionString);
InsertData(client, connectionString);
QueryData(client, connectionString);
QueryWithReqId(client, connectionString);
}
}
catch (TDengineError e)
@ -52,62 +52,67 @@ namespace Examples
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to create db and table,url:" + connectionString +"; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to create database power or stable meters, ErrCode: " + e.Code +
", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to create db and table, url:" + connectionString + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to create database power or stable meters, ErrMessage: " + e.Message);
throw;
}
// ANCHOR_END: create_db_and_table
}
private static void InsertData(ITDengineClient client,string connectionString)
private static void InsertData(ITDengineClient client, string connectionString)
{
// ANCHOR: insert_data
// insert data, please make sure the database and table are created before
var insertQuery = "INSERT INTO " +
"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 219, 0.31000) " +
"(NOW + 2a, 12.60000, 218, 0.33000) " +
"(NOW + 3a, 12.30000, 221, 0.31000) " +
"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 218, 0.25000) ";
try
{
// insert data, please make sure the database and table are created before
var insertQuery = "INSERT INTO " +
"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 219, 0.31000) " +
"(NOW + 2a, 12.60000, 218, 0.33000) " +
"(NOW + 3a, 12.30000, 221, 0.31000) " +
"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 218, 0.25000) ";
var affectedRows = client.Exec(insertQuery);
Console.WriteLine("Successfully inserted " + affectedRows + " rows to power.meters.");
}
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to insert data to power.meters, url:" + connectionString + "; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to insert data to power.meters, sql: " + insertQuery + ", ErrCode: " +
e.Code + ", ErrMessage: " +
e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to insert data to power.meters, url:" + connectionString + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to insert data to power.meters, sql: " + insertQuery + ", ErrMessage: " +
e.Message);
throw;
}
// ANCHOR_END: insert_data
}
private static void QueryData(ITDengineClient client,string connectionString)
private static void QueryData(ITDengineClient client, string connectionString)
{
// ANCHOR: select_data
// query data, make sure the database and table are created before
var query = "SELECT ts, current, location FROM power.meters limit 100";
try
{
// query data, make sure the database and table are created before
var query = "SELECT ts, current, location FROM power.meters limit 100";
using (var rows = client.Query(query))
{
while (rows.Read())
{
// Add your data processing logic here
var ts = (DateTime)rows.GetValue(0);
var current = (float)rows.GetValue(1);
var location = Encoding.UTF8.GetString((byte[])rows.GetValue(2));
@ -119,28 +124,30 @@ namespace Examples
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to query data from power.meters, url:" + connectionString + "; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to query data from power.meters, sql: " + query + ", ErrCode: " + e.Code +
", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to query data from power.meters, url:" + connectionString + "; ErrMessage: " + e.Message);
Console.WriteLine(
"Failed to query data from power.meters, sql: " + query + ", ErrMessage: " + e.Message);
throw;
}
// ANCHOR_END: select_data
}
private static void QueryWithReqId(ITDengineClient client,string connectionString)
private static void QueryWithReqId(ITDengineClient client, string connectionString)
{
// ANCHOR: query_id
var reqId = (long)3;
// query data
var query = "SELECT ts, current, location FROM power.meters limit 1";
try
{
// query data
var query = "SELECT ts, current, location FROM power.meters limit 1";
// query with request id 3
using (var rows = client.Query(query,reqId))
using (var rows = client.Query(query, reqId))
{
while (rows.Read())
{
@ -155,13 +162,15 @@ namespace Examples
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to execute sql with reqId: " + reqId + ", url:" + connectionString + "; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to execute sql with reqId: " + reqId + ", sql: " + query + ", ErrCode: " +
e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to execute sql with reqId: " + reqId + ", url:" + connectionString + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to execute sql with reqId: " + reqId + ", sql: " + query + ", ErrMessage: " +
e.Message);
throw;
}
// ANCHOR_END: query_id

6
docs/examples/csharp/wsStmt/Program.cs
View File

@ -63,16 +63,16 @@ namespace Examples
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to insert to table meters using stmt, url: " + connectionString + "; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to insert to table meters using stmt, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to insert to table meters using stmt, url: " + connectionString + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to insert to table meters using stmt, ErrMessage: " + e.Message);
throw;
}
}
// ANCHOR_END: main
}
}
}

8
docs/examples/csharp/wssml/Program.cs
View File

@ -44,17 +44,17 @@ namespace TDengineExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to insert data with schemaless, host:" + host + "; ErrCode:" + e.Code +
"; ErrMessage: " + e.Error);
Console.WriteLine("Failed to insert data with schemaless, ErrCode: " + e.Code +
", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to insert data with schemaless, host:" + host + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to insert data with schemaless, ErrMessage: " + e.Message);
throw;
}
}
// ANCHOR_END: main
}
}
}

111
docs/examples/csharp/wssubscribe/Program.cs
View File

@ -6,6 +6,11 @@ namespace TMQExample
{
internal class SubscribeDemo
{
private static string _host = "";
private static string _groupId = "";
private static string _clientId = "";
private static string _topic = "";
public static void Main(string[] args)
{
try
@ -68,9 +73,9 @@ namespace TMQExample
{
// ANCHOR: create_consumer
// consumer config
var host = "127.0.0.1";
var groupId = "group1";
var clientId = "client1";
_host = "127.0.0.1";
_groupId = "group1";
_clientId = "client1";
var cfg = new Dictionary<string, string>()
{
{ "td.connect.type", "WebSocket" },
@ -79,9 +84,9 @@ namespace TMQExample
{ "msg.with.table.name", "true" },
{ "enable.auto.commit", "true" },
{ "auto.commit.interval.ms", "1000" },
{ "group.id", groupId },
{ "client.id", clientId },
{ "td.connect.ip", host },
{ "group.id", _groupId },
{ "client.id", _clientId },
{ "td.connect.ip", _host },
{ "td.connect.user", "root" },
{ "td.connect.pass", "taosdata" },
};
@ -90,20 +95,33 @@ namespace TMQExample
{
// create consumer
consumer = new ConsumerBuilder<Dictionary<string, object>>(cfg).Build();
Console.WriteLine("Create consumer successfully, host: " + host + ", groupId: " + groupId +
", clientId: " + clientId);
Console.WriteLine(
$"Create consumer successfully, " +
$"host: {_host}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}");
}
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to create websocket consumer, host : " + host + "; ErrCode:" + e.Code +
"; ErrMessage: " + e.Error);
Console.WriteLine(
$"Failed to create native consumer, " +
$"host: {_host}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"ErrCode: {e.Code}, " +
$"ErrMessage: {e.Error}");
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to create websocket consumer, host : " + host + "; ErrMessage: " + e.Message);
Console.WriteLine(
$"Failed to create native consumer, " +
$"host: {_host}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"ErrMessage: {e.Message}");
throw;
}
@ -114,10 +132,11 @@ namespace TMQExample
static void Consume(IConsumer<Dictionary<string, object>> consumer)
{
// ANCHOR: subscribe
_topic = "topic_meters";
try
{
// subscribe
consumer.Subscribe(new List<string>() { "topic_meters" });
consumer.Subscribe(new List<string>() { _topic });
Console.WriteLine("Subscribe topics successfully");
for (int i = 0; i < 50; i++)
{
@ -138,13 +157,23 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to poll data; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine(
$"Failed to poll data, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"ErrCode: {e.Code}, " +
$"ErrMessage: {e.Error}");
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to poll data; ErrMessage:" + e.Message);
Console.WriteLine($"Failed to poll data, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"ErrMessage: {e.Message}");
throw;
}
// ANCHOR_END: subscribe
@ -163,18 +192,32 @@ namespace TMQExample
{
consumer.Seek(new TopicPartitionOffset(topicPartition.Topic, topicPartition.Partition, 0));
}
Console.WriteLine("Assignment seek to beginning successfully");
}
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Seek example failed; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine(
$"Failed to seek offset, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"offset: 0, " +
$"ErrCode: {e.Code}, " +
$"ErrMessage: {e.Error}");
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Seek example failed; ErrMessage: " + e.Message);
Console.WriteLine(
$"Failed to seek offset, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"offset: 0, " +
$"ErrMessage: {e.Message}");
throw;
}
// ANCHOR_END: seek
@ -185,6 +228,7 @@ namespace TMQExample
// ANCHOR: commit_offset
for (int i = 0; i < 5; i++)
{
TopicPartitionOffset topicPartitionOffset = null;
try
{
// consume message with using block to ensure the result is disposed
@ -192,9 +236,10 @@ namespace TMQExample
{
if (cr == null) continue;
// commit offset
topicPartitionOffset = cr.TopicPartitionOffset;
consumer.Commit(new List<TopicPartitionOffset>
{
cr.TopicPartitionOffset,
topicPartitionOffset,
});
Console.WriteLine("Commit offset manually successfully.");
}
@ -202,13 +247,26 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to execute consumer functions. ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine(
$"Failed to commit offset, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"offset: {topicPartitionOffset}, " +
$"ErrCode: {e.Code}, " +
$"ErrMessage: {e.Error}");
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to execute consumer functions. ErrMessage:" + e.Message);
Console.WriteLine(
$"Failed to commit offset, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"offset: {topicPartitionOffset}, " +
$"ErrMessage: {e.Message}");
throw;
}
}
@ -226,13 +284,24 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to unsubscribe consumer. ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine(
$"Failed to unsubscribe consumer, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"ErrCode: {e.Code}, " +
$"ErrMessage: {e.Error}");
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to unsubscribe consumer. Err: " + e.Message);
Console.WriteLine(
$"Failed to execute commit example, " +
$"topic: {_topic}, " +
$"groupId: {_groupId}, " +
$"clientId: {_clientId}, " +
$"ErrMessage: {e.Message}");
throw;
}
finally

118
docs/examples/go/queryreqid/main.go
View File

@ -1,58 +1,60 @@
package main
import (
"context"
"database/sql"
"fmt"
"log"
"time"
_ "github.com/taosdata/driver-go/v3/taosSql"
)
func main() {
taosDSN := "root:taosdata@tcp(localhost:6030)/"
db, err := sql.Open("taosSql", taosDSN)
if err != nil {
log.Fatalln("Failed to connect to " + taosDSN + "; ErrMessage: " + err.Error())
}
defer db.Close()
initEnv(db)
// ANCHOR: query_id
// use context to set request id
reqId := int64(3)
ctx := context.WithValue(context.Background(), "taos_req_id", reqId)
// execute query with context
rows, err := db.QueryContext(ctx, "SELECT ts, current, location FROM power.meters limit 1")
if err != nil {
log.Fatalf("Failed to execute sql with reqId: %d, url: %s; ErrMessage: %s\n", reqId, taosDSN, err.Error())
}
for rows.Next() {
var (
ts time.Time
current float32
location string
)
err = rows.Scan(&ts, &current, &location)
if err != nil {
log.Fatal("Scan error: ", err)
}
fmt.Printf("ts: %s, current: %f, location: %s\n", ts, current, location)
}
// ANCHOR_END: query_id
}
func initEnv(conn *sql.DB) {
_, err := conn.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatal("Create database error: ", err)
}
_, err = conn.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatal("Create table error: ", err)
}
_, err = conn.Exec("INSERT INTO power.d1001 USING power.meters TAGS (2, 'California.SanFrancisco') VALUES (NOW , 10.2, 219, 0.32)")
if err != nil {
log.Fatal("Insert data error: ", err)
}
}
package main
import (
"context"
"database/sql"
"fmt"
"log"
"time"
_ "github.com/taosdata/driver-go/v3/taosSql"
)
func main() {
taosDSN := "root:taosdata@tcp(localhost:6030)/"
db, err := sql.Open("taosSql", taosDSN)
if err != nil {
log.Fatalln("Failed to connect to " + taosDSN + ", ErrMessage: " + err.Error())
}
defer db.Close()
initEnv(db)
// ANCHOR: query_id
// use context to set request id
reqId := int64(3)
ctx := context.WithValue(context.Background(), "taos_req_id", reqId)
// execute query with context
querySql := "SELECT ts, current, location FROM power.meters limit 1"
rows, err := db.QueryContext(ctx, querySql)
if err != nil {
log.Fatalf("Failed to execute sql with reqId: %d, url: %s, sql: %s, ErrMessage: %s\n", reqId, taosDSN, querySql, err.Error())
}
for rows.Next() {
// Add your data processing logic here
var (
ts time.Time
current float32
location string
)
err = rows.Scan(&ts, &current, &location)
if err != nil {
log.Fatalf("Failed to scan data, reqId: %d, url:%s, sql: %s, ErrMessage: %s\n", reqId, taosDSN, querySql, err)
}
fmt.Printf("ts: %s, current: %f, location: %s\n", ts, current, location)
}
// ANCHOR_END: query_id
}
func initEnv(conn *sql.DB) {
_, err := conn.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatal("Create database power error: ", err)
}
_, err = conn.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatal("Create stable meters error: ", err)
}
_, err = conn.Exec("INSERT INTO power.d1001 USING power.meters TAGS (2, 'California.SanFrancisco') VALUES (NOW , 10.2, 219, 0.32)")
if err != nil {
log.Fatal("Insert data to power.meters error: ", err)
}
}

10
docs/examples/go/schemaless/native/main.go
View File

@ -20,26 +20,26 @@ func main() {
defer conn.Close()
_, err = conn.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatalln("Failed to create db host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create database power, ErrMessage: " + err.Error())
}
_, err = conn.Exec("USE power")
if err != nil {
log.Fatalln("Failed to use db host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to use database power, ErrMessage: " + err.Error())
}
// insert influxdb line protocol
err = conn.InfluxDBInsertLines([]string{lineDemo}, "ms")
if err != nil {
log.Fatalln("Failed to insert data with schemaless, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to insert data with schemaless, data:" + lineDemo + ", ErrMessage: " + err.Error())
}
// insert opentsdb telnet protocol
err = conn.OpenTSDBInsertTelnetLines([]string{telnetDemo})
if err != nil {
log.Fatalln("Failed to insert data with schemaless, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to insert data with schemaless, data:" + telnetDemo + ", ErrMessage: " + err.Error())
}
// insert opentsdb json protocol
err = conn.OpenTSDBInsertJsonPayload(jsonDemo)
if err != nil {
log.Fatalln("Failed to insert data with schemaless, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to insert data with schemaless, data:" + jsonDemo + ", ErrMessage: " + err.Error())
}
fmt.Println("Inserted data with schemaless successfully.")
}

8
docs/examples/go/schemaless/ws/main.go
View File

@ -25,7 +25,7 @@ func main() {
defer db.Close()
_, err = db.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatalln("Failed to create db host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create database power, ErrMessage: " + err.Error())
}
s, err := schemaless.NewSchemaless(schemaless.NewConfig("ws://localhost:6041", 1,
schemaless.SetDb("power"),
@ -40,17 +40,17 @@ func main() {
// insert influxdb line protocol
err = s.Insert(lineDemo, schemaless.InfluxDBLineProtocol, "ms", 0, common.GetReqID())
if err != nil {
log.Fatalln("Failed to insert data with schemaless, host:" + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to insert data with schemaless, data:" + lineDemo + ", ErrMessage: " + err.Error())
}
// insert opentsdb telnet line protocol
err = s.Insert(telnetDemo, schemaless.OpenTSDBTelnetLineProtocol, "ms", 0, common.GetReqID())
if err != nil {
log.Fatalln("Failed to insert data with schemaless, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to insert data with schemaless, data: " + telnetDemo + ", ErrMessage: " + err.Error())
}
// insert opentsdb json format protocol
err = s.Insert(jsonDemo, schemaless.OpenTSDBJsonFormatProtocol, "s", 0, common.GetReqID())
if err != nil {
log.Fatalln("Failed to insert data with schemaless, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to insert data with schemaless, data: " + jsonDemo + ", ErrMessage: " + err.Error())
}
fmt.Println("Inserted data with schemaless successfully.")
}

171
docs/examples/go/sqlquery/main.go
View File

@ -1,85 +1,86 @@
package main
import (
"database/sql"
"fmt"
"log"
"time"
_ "github.com/taosdata/driver-go/v3/taosSql"
)
func main() {
var taosDSN = "root:taosdata@tcp(localhost:6030)/"
db, err := sql.Open("taosSql", taosDSN)
if err != nil {
log.Fatalln("Failed to connect to " + taosDSN + "; ErrMessage: " + err.Error())
}
defer db.Close()
// ANCHOR: create_db_and_table
// create database
res, err := db.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatalln("Failed to create db, url:" + taosDSN + "; ErrMessage: " + err.Error())
}
rowsAffected, err := res.RowsAffected()
if err != nil {
log.Fatalln("Failed to get create db rowsAffected, url:" + taosDSN + "; ErrMessage: " + err.Error())
}
// you can check rowsAffected here
fmt.Println("Create database power successfully, rowsAffected: ", rowsAffected)
// create table
res, err = db.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatalln("Failed to create db and table, url:" + taosDSN + "; ErrMessage: " + err.Error())
}
rowsAffected, err = res.RowsAffected()
if err != nil {
log.Fatalln("Failed to get create db rowsAffected, url:" + taosDSN + "; ErrMessage: " + err.Error())
}
// you can check rowsAffected here
fmt.Println("Create stable power.meters successfully, rowsAffected:", rowsAffected)
// ANCHOR_END: create_db_and_table
// ANCHOR: insert_data
// insert data, please make sure the database and table are created before
insertQuery := "INSERT INTO " +
"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 219, 0.31000) " +
"(NOW + 2a, 12.60000, 218, 0.33000) " +
"(NOW + 3a, 12.30000, 221, 0.31000) " +
"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 218, 0.25000) "
res, err = db.Exec(insertQuery)
if err != nil {
log.Fatal("Failed to insert data to power.meters, url:" + taosDSN + "; ErrMessage: " + err.Error())
}
rowsAffected, err = res.RowsAffected()
if err != nil {
log.Fatal("Failed to get insert rowsAffected, url:" + taosDSN + "; ErrMessage: " + err.Error())
}
// you can check affectedRows here
fmt.Printf("Successfully inserted %d rows to power.meters.\n", rowsAffected)
// ANCHOR_END: insert_data
// ANCHOR: select_data
// query data, make sure the database and table are created before
rows, err := db.Query("SELECT ts, current, location FROM power.meters limit 100")
if err != nil {
log.Fatal("Failed to query data from power.meters, url:" + taosDSN + "; ErrMessage: " + err.Error())
}
for rows.Next() {
var (
ts time.Time
current float32
location string
)
err = rows.Scan(&ts, &current, &location)
if err != nil {
log.Fatal("Failed to scan data, url:" + taosDSN + "; ErrMessage: " + err.Error())
}
// you can check data here
fmt.Printf("ts: %s, current: %f, location: %s\n", ts, current, location)
}
// ANCHOR_END: select_data
}
package main
import (
"database/sql"
"fmt"
"log"
"time"
_ "github.com/taosdata/driver-go/v3/taosSql"
)
func main() {
var taosDSN = "root:taosdata@tcp(localhost:6030)/"
db, err := sql.Open("taosSql", taosDSN)
if err != nil {
log.Fatalln("Failed to connect to " + taosDSN + ", ErrMessage: " + err.Error())
}
defer db.Close()
// ANCHOR: create_db_and_table
// create database
res, err := db.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatalln("Failed to create database power, ErrMessage: " + err.Error())
}
rowsAffected, err := res.RowsAffected()
if err != nil {
log.Fatalln("Failed to get create database rowsAffected, ErrMessage: " + err.Error())
}
// you can check rowsAffected here
fmt.Println("Create database power successfully, rowsAffected: ", rowsAffected)
// create table
res, err = db.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatalln("Failed to create stable meters, ErrMessage: " + err.Error())
}
rowsAffected, err = res.RowsAffected()
if err != nil {
log.Fatalln("Failed to get create stable rowsAffected, ErrMessage: " + err.Error())
}
// you can check rowsAffected here
fmt.Println("Create stable power.meters successfully, rowsAffected:", rowsAffected)
// ANCHOR_END: create_db_and_table
// ANCHOR: insert_data
// insert data, please make sure the database and table are created before
insertQuery := "INSERT INTO " +
"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 219, 0.31000) " +
"(NOW + 2a, 12.60000, 218, 0.33000) " +
"(NOW + 3a, 12.30000, 221, 0.31000) " +
"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 218, 0.25000) "
res, err = db.Exec(insertQuery)
if err != nil {
log.Fatalf("Failed to insert data to power.meters, sql: %s, ErrMessage: %s\n", insertQuery, err.Error())
}
rowsAffected, err = res.RowsAffected()
if err != nil {
log.Fatalf("Failed to get insert rowsAffected, sql: %s, ErrMessage: %s\n", insertQuery, err.Error())
}
// you can check affectedRows here
fmt.Printf("Successfully inserted %d rows to power.meters.\n", rowsAffected)
// ANCHOR_END: insert_data
// ANCHOR: select_data
// query data, make sure the database and table are created before
sql := "SELECT ts, current, location FROM power.meters limit 100"
rows, err := db.Query(sql)
if err != nil {
log.Fatalf("Failed to query data from power.meters, sql: %s, ErrMessage: %s\n", sql, err.Error())
}
for rows.Next() {
// Add your data processing logic here
var (
ts time.Time
current float32
location string
)
err = rows.Scan(&ts, &current, &location)
if err != nil {
log.Fatalf("Failed to scan data, sql: %s, ErrMessage: %s\n", sql, err)
}
fmt.Printf("ts: %s, current: %f, location: %s\n", ts, current, location)
}
// ANCHOR_END: select_data
}

16
docs/examples/go/stmt/native/main.go
View File

@ -23,22 +23,22 @@ func main() {
// prepare database and table
_, err = db.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatalln("Failed to create db, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create database power, ErrMessage: " + err.Error())
}
_, err = db.Exec("USE power")
if err != nil {
log.Fatalln("Failed to use db, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to use database power, ErrMessage: " + err.Error())
}
_, err = db.Exec("CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatalln("Failed to create table, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create stable meters, ErrMessage: " + err.Error())
}
// prepare statement
sql := "INSERT INTO ? USING meters TAGS(?,?) VALUES (?,?,?,?)"
stmt := db.Stmt()
err = stmt.Prepare(sql)
if err != nil {
log.Fatalln("Failed to prepare sql, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to prepare sql, sql: " + sql + ", ErrMessage: " + err.Error())
}
for i := 1; i <= numOfSubTable; i++ {
tableName := fmt.Sprintf("d_bind_%d", i)
@ -46,7 +46,7 @@ func main() {
// set tableName and tags
err = stmt.SetTableNameWithTags(tableName, tags)
if err != nil {
log.Fatalln("Failed to set table name and tags, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to set table name and tags, tableName: " + tableName + "; ErrMessage: " + err.Error())
}
// bind column data
current := time.Now()
@ -58,18 +58,18 @@ func main() {
AddFloat(rand.Float32())
err = stmt.BindRow(row)
if err != nil {
log.Fatalln("Failed to bind params, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to bind params, ErrMessage: " + err.Error())
}
}
// add batch
err = stmt.AddBatch()
if err != nil {
log.Fatalln("Failed to add batch, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to add batch, ErrMessage: " + err.Error())
}
// execute batch
err = stmt.Execute()
if err != nil {
log.Fatalln("Failed to exec, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to exec, ErrMessage: " + err.Error())
}
// get affected rows
affected := stmt.GetAffectedRows()

20
docs/examples/go/stmt/ws/main.go
View File

@ -27,11 +27,11 @@ func main() {
// prepare database and table
_, err = db.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatalln("Failed to create db, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create database power, ErrMessage: " + err.Error())
}
_, err = db.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatalln("Failed to create table, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create stable power.meters, ErrMessage: " + err.Error())
}
config := stmt.NewConfig(fmt.Sprintf("ws://%s:6041", host), 0)
@ -49,11 +49,11 @@ func main() {
sql := "INSERT INTO ? USING meters TAGS(?,?) VALUES (?,?,?,?)"
stmt, err := connector.Init()
if err != nil {
log.Fatalln("Failed to init stmt, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to init stmt, sql: " + sql + ", ErrMessage: " + err.Error())
}
err = stmt.Prepare(sql)
if err != nil {
log.Fatal("Failed to prepare sql, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to prepare sql, sql: " + sql + ", ErrMessage: " + err.Error())
}
for i := 1; i <= numOfSubTable; i++ {
tableName := fmt.Sprintf("d_bind_%d", i)
@ -63,12 +63,12 @@ func main() {
// set tableName
err = stmt.SetTableName(tableName)
if err != nil {
log.Fatal("Failed to set table name, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to set table name, tableName: " + tableName + "; ErrMessage: " + err.Error())
}
// set tags
err = stmt.SetTags(tags, tagsType)
if err != nil {
log.Fatal("Failed to set tags, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to set tags, ErrMessage: " + err.Error())
}
// bind column data
current := time.Now()
@ -80,18 +80,18 @@ func main() {
columnData[3] = param.NewParam(1).AddFloat(rand.Float32())
err = stmt.BindParam(columnData, columnType)
if err != nil {
log.Fatal("Failed to bind params, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to bind params, ErrMessage: " + err.Error())
}
}
// add batch
err = stmt.AddBatch()
if err != nil {
log.Fatal("Failed to add batch, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to add batch, ErrMessage: " + err.Error())
}
// execute batch
err = stmt.Exec()
if err != nil {
log.Fatal("Failed to exec, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to exec, ErrMessage: " + err.Error())
}
// get affected rows
affected := stmt.GetAffectedRows()
@ -100,6 +100,6 @@ func main() {
}
err = stmt.Close()
if err != nil {
log.Fatal("Failed to close stmt, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to close stmt, ErrMessage: " + err.Error())
}
}

313
docs/examples/go/tmq/native/main.go
View File

@ -1,134 +1,179 @@
package main
import (
"database/sql"
"fmt"
"log"
"time"
"github.com/taosdata/driver-go/v3/af/tmq"
tmqcommon "github.com/taosdata/driver-go/v3/common/tmq"
_ "github.com/taosdata/driver-go/v3/taosSql"
)
var done = make(chan struct{})
func main() {
// init env
taosDSN := "root:taosdata@tcp(127.0.0.1:6030)/"
conn, err := sql.Open("taosSql", taosDSN)
if err != nil {
log.Fatalln("Failed to connect to " + taosDSN + "; ErrMessage: " + err.Error())
}
defer func() {
conn.Close()
}()
initEnv(conn)
// ANCHOR: create_consumer
// create consumer
groupID := "group1"
clientID := "client1"
host := "127.0.0.1"
consumer, err := tmq.NewConsumer(&tmqcommon.ConfigMap{
"td.connect.user": "root",
"td.connect.pass": "taosdata",
"auto.offset.reset": "latest",
"msg.with.table.name": "true",
"enable.auto.commit": "true",
"auto.commit.interval.ms": "1000",
"group.id": groupID,
"client.id": clientID,
})
if err != nil {
log.Fatalln("Failed to create native consumer, host : " + host + "; ErrMessage: " + err.Error())
}
log.Println("Create consumer successfully, host: " + host + ", groupId: " + groupID + ", clientId: " + clientID)
// ANCHOR_END: create_consumer
// ANCHOR: subscribe
err = consumer.Subscribe("topic_meters", nil)
if err != nil {
log.Fatalln("Failed to subscribe, host : " + host + "; ErrMessage: " + err.Error())
}
log.Println("Subscribe topics successfully")
for i := 0; i < 50; i++ {
ev := consumer.Poll(100)
if ev != nil {
switch e := ev.(type) {
case *tmqcommon.DataMessage:
// process your data here
fmt.Printf("data:%v\n", e)
// ANCHOR: commit_offset
// commit offset
_, err = consumer.CommitOffsets([]tmqcommon.TopicPartition{e.TopicPartition})
if err != nil {
log.Fatalln("Failed to commit offset, host : " + host + "; ErrMessage: " + err.Error())
}
log.Println("Commit offset manually successfully.")
// ANCHOR_END: commit_offset
case tmqcommon.Error:
fmt.Printf("%% Error: %v: %v\n", e.Code(), e)
log.Fatalln("Failed to poll data, host : " + host + "; ErrMessage: " + err.Error())
}
}
}
// ANCHOR_END: subscribe
// ANCHOR: seek
// get assignment
partitions, err := consumer.Assignment()
if err != nil {
log.Fatal("Failed to get assignment; ErrMessage: " + err.Error())
}
fmt.Println("Now assignment:", partitions)
for i := 0; i < len(partitions); i++ {
// seek to the beginning
err = consumer.Seek(tmqcommon.TopicPartition{
Topic: partitions[i].Topic,
Partition: partitions[i].Partition,
Offset: 0,
}, 0)
if err != nil {
log.Fatalln("Seek example failed; ErrMessage: " + err.Error())
}
}
fmt.Println("Assignment seek to beginning successfully")
// ANCHOR_END: seek
// ANCHOR: close
// unsubscribe
err = consumer.Unsubscribe()
if err != nil {
log.Fatal("Failed to unsubscribe consumer. ErrMessage: " + err.Error())
}
// close consumer
err = consumer.Close()
if err != nil {
log.Fatal("Failed to close consumer. ErrMessage: " + err.Error())
}
// ANCHOR_END: close
<-done
}
func initEnv(conn *sql.DB) {
_, err := conn.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatal("Failed to create database. ErrMessage: " + err.Error())
}
_, err = conn.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatal("Failed to create stable. ErrMessage: " + err.Error())
}
_, err = conn.Exec("CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM power.meters")
if err != nil {
log.Fatal("Failed to create topic. ErrMessage: " + err.Error())
}
go func() {
for i := 0; i < 10; i++ {
time.Sleep(time.Second)
_, err = conn.Exec("INSERT INTO power.d1001 USING power.meters TAGS (2, 'California.SanFrancisco') VALUES (NOW , 10.2, 219, 0.32)")
if err != nil {
log.Fatal("Failed to insert data. ErrMessage: " + err.Error())
}
}
done <- struct{}{}
}()
}
package main
import (
"database/sql"
"fmt"
"log"
"time"
"github.com/taosdata/driver-go/v3/af/tmq"
tmqcommon "github.com/taosdata/driver-go/v3/common/tmq"
_ "github.com/taosdata/driver-go/v3/taosSql"
)
var done = make(chan struct{})
var groupID string
var clientID string
var host string
var topic string
func main() {
// init env
taosDSN := "root:taosdata@tcp(127.0.0.1:6030)/"
conn, err := sql.Open("taosSql", taosDSN)
if err != nil {
log.Fatalln("Failed to connect to " + taosDSN + ", ErrMessage: " + err.Error())
}
defer func() {
conn.Close()
}()
initEnv(conn)
// ANCHOR: create_consumer
// create consumer
groupID = "group1"
clientID = "client1"
host = "127.0.0.1"
consumer, err := tmq.NewConsumer(&tmqcommon.ConfigMap{
"td.connect.user": "root",
"td.connect.pass": "taosdata",
"auto.offset.reset": "latest",
"msg.with.table.name": "true",
"enable.auto.commit": "true",
"auto.commit.interval.ms": "1000",
"group.id": groupID,
"client.id": clientID,
})
if err != nil {
log.Fatalf(
"Failed to create native consumer, host: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
host,
groupID,
clientID,
err.Error(),
)
}
log.Printf("Create consumer successfully, host: %s, groupId: %s, clientId: %s\n", host, groupID, clientID)
// ANCHOR_END: create_consumer
// ANCHOR: subscribe
topic = "topic_meters"
err = consumer.Subscribe(topic, nil)
if err != nil {
log.Fatalf(
"Failed to subscribe topic_meters, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
topic,
groupID,
clientID,
err.Error(),
)
}
log.Println("Subscribe topics successfully")
for i := 0; i < 50; i++ {
ev := consumer.Poll(100)
if ev != nil {
switch e := ev.(type) {
case *tmqcommon.DataMessage:
// process your data here
fmt.Printf("data:%v\n", e)
// ANCHOR: commit_offset
// commit offset
_, err = consumer.CommitOffsets([]tmqcommon.TopicPartition{e.TopicPartition})
if err != nil {
log.Fatalf(
"Failed to commit offset, topic: %s, groupId: %s, clientId: %s, offset %s, ErrMessage: %s\n",
topic,
groupID,
clientID,
e.TopicPartition,
err.Error(),
)
}
log.Println("Commit offset manually successfully.")
// ANCHOR_END: commit_offset
case tmqcommon.Error:
log.Fatalf("Failed to poll data, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n", topic, groupID, clientID, e.Error())
}
}
}
// ANCHOR_END: subscribe
// ANCHOR: seek
// get assignment
partitions, err := consumer.Assignment()
if err != nil {
log.Fatalf("Failed to get assignment, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n", topic, groupID, clientID, err.Error())
}
fmt.Println("Now assignment:", partitions)
for i := 0; i < len(partitions); i++ {
// seek to the beginning
err = consumer.Seek(tmqcommon.TopicPartition{
Topic: partitions[i].Topic,
Partition: partitions[i].Partition,
Offset: 0,
}, 0)
if err != nil {
log.Fatalf(
"Failed to execute seek offset, topic: %s, groupId: %s, clientId: %s, partition: %d, offset: %d, ErrMessage: %s\n",
topic,
groupID,
clientID,
partitions[i].Partition,
0,
err.Error(),
)
}
}
fmt.Println("Assignment seek to beginning successfully")
// ANCHOR_END: seek
// ANCHOR: close
// unsubscribe
err = consumer.Unsubscribe()
if err != nil {
log.Fatalf(
"Failed to unsubscribe consumer, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
topic,
groupID,
clientID,
err.Error(),
)
}
fmt.Println("Consumer unsubscribed successfully.")
// close consumer
err = consumer.Close()
if err != nil {
log.Fatalf(
"Failed to close consumer, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
topic,
groupID,
clientID,
err.Error(),
)
}
fmt.Println("Consumer closed successfully.")
// ANCHOR_END: close
<-done
}
func initEnv(conn *sql.DB) {
_, err := conn.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatal("Failed to create database, ErrMessage: " + err.Error())
}
_, err = conn.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatal("Failed to create stable, ErrMessage: " + err.Error())
}
_, err = conn.Exec("CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM power.meters")
if err != nil {
log.Fatal("Failed to create topic, ErrMessage: " + err.Error())
}
go func() {
for i := 0; i < 10; i++ {
time.Sleep(time.Second)
_, err = conn.Exec("INSERT INTO power.d1001 USING power.meters TAGS (2, 'California.SanFrancisco') VALUES (NOW , 10.2, 219, 0.32)")
if err != nil {
log.Fatal("Failed to insert data, ErrMessage: " + err.Error())
}
}
done <- struct{}{}
}()
}

336
docs/examples/go/tmq/ws/main.go
View File

@ -1,139 +1,197 @@
package main
import (
"database/sql"
"fmt"
"log"
"time"
"github.com/taosdata/driver-go/v3/common"
tmqcommon "github.com/taosdata/driver-go/v3/common/tmq"
_ "github.com/taosdata/driver-go/v3/taosWS"
"github.com/taosdata/driver-go/v3/ws/tmq"
)
var done = make(chan struct{})
func main() {
// init env
taosDSN := "root:taosdata@ws(127.0.0.1:6041)/"
conn, err := sql.Open("taosWS", taosDSN)
if err != nil {
log.Fatalln("Failed to connect to " + taosDSN + "; ErrMessage: " + err.Error())
}
defer func() {
conn.Close()
}()
initEnv(conn)
// ANCHOR: create_consumer
// create consumer
wsUrl := "ws://127.0.0.1:6041"
groupID := "group1"
clientID := "client1"
consumer, err := tmq.NewConsumer(&tmqcommon.ConfigMap{
"ws.url": wsUrl,
"ws.message.channelLen": uint(0),
"ws.message.timeout": common.DefaultMessageTimeout,
"ws.message.writeWait": common.DefaultWriteWait,
"td.connect.user": "root",
"td.connect.pass": "taosdata",
"auto.offset.reset": "latest",
"msg.with.table.name": "true",
"enable.auto.commit": "true",
"auto.commit.interval.ms": "1000",
"group.id": groupID,
"client.id": clientID,
})
if err != nil {
log.Fatalln("Failed to create websocket consumer, host : " + wsUrl + "; ErrMessage: " + err.Error())
}
log.Println("Create consumer successfully, host: " + wsUrl + ", groupId: " + groupID + ", clientId: " + clientID)
// ANCHOR_END: create_consumer
// ANCHOR: subscribe
err = consumer.Subscribe("topic_meters", nil)
if err != nil {
log.Fatalln("Failed to subscribe, host : " + wsUrl + "; ErrMessage: " + err.Error())
}
log.Println("Subscribe topics successfully")
for i := 0; i < 50; i++ {
ev := consumer.Poll(100)
if ev != nil {
switch e := ev.(type) {
case *tmqcommon.DataMessage:
// process your data here
fmt.Printf("data:%v\n", e)
// ANCHOR: commit_offset
// commit offset
_, err = consumer.CommitOffsets([]tmqcommon.TopicPartition{e.TopicPartition})
if err != nil {
log.Fatalln("Failed to commit offset, host : " + wsUrl + "; ErrMessage: " + err.Error())
}
log.Println("Commit offset manually successfully.")
// ANCHOR_END: commit_offset
case tmqcommon.Error:
fmt.Printf("%% Error: %v: %v\n", e.Code(), e)
log.Fatalln("Failed to poll data, host : " + wsUrl + "; ErrMessage: " + err.Error())
}
}
}
// ANCHOR_END: subscribe
// ANCHOR: seek
// get assignment
partitions, err := consumer.Assignment()
if err != nil {
log.Fatal("Failed to get assignment; ErrMessage: " + err.Error())
}
fmt.Println("Now assignment:", partitions)
for i := 0; i < len(partitions); i++ {
// seek to the beginning
err = consumer.Seek(tmqcommon.TopicPartition{
Topic: partitions[i].Topic,
Partition: partitions[i].Partition,
Offset: 0,
}, 0)
if err != nil {
log.Fatalln("Seek example failed; ErrMessage: " + err.Error())
}
}
fmt.Println("Assignment seek to beginning successfully")
// ANCHOR_END: seek
// ANCHOR: close
// unsubscribe
err = consumer.Unsubscribe()
if err != nil {
log.Fatal("Failed to unsubscribe consumer. ErrMessage: " + err.Error())
}
// close consumer
err = consumer.Close()
if err != nil {
log.Fatal("Failed to close consumer. ErrMessage: " + err.Error())
}
// ANCHOR_END: close
<-done
}
func initEnv(conn *sql.DB) {
_, err := conn.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatal("Failed to create database. ErrMessage: " + err.Error())
}
_, err = conn.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatal("Failed to create stable. ErrMessage: " + err.Error())
}
_, err = conn.Exec("CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM power.meters")
if err != nil {
log.Fatal("Failed to create topic. ErrMessage: " + err.Error())
}
go func() {
for i := 0; i < 10; i++ {
time.Sleep(time.Second)
_, err = conn.Exec("INSERT INTO power.d1001 USING power.meters TAGS (2, 'California.SanFrancisco') VALUES (NOW , 10.2, 219, 0.32)")
if err != nil {
log.Fatal("Failed to insert data. ErrMessage: " + err.Error())
}
}
done <- struct{}{}
}()
}
package main
import (
"database/sql"
"fmt"
"log"
"time"
"github.com/taosdata/driver-go/v3/common"
tmqcommon "github.com/taosdata/driver-go/v3/common/tmq"
_ "github.com/taosdata/driver-go/v3/taosWS"
"github.com/taosdata/driver-go/v3/ws/tmq"
)
var done = make(chan struct{})
var groupID string
var clientID string
var host string
var topic string
func main() {
// init env
taosDSN := "root:taosdata@ws(127.0.0.1:6041)/"
conn, err := sql.Open("taosWS", taosDSN)
if err != nil {
log.Fatalln("Failed to connect to " + taosDSN + ", ErrMessage: " + err.Error())
}
defer func() {
conn.Close()
}()
initEnv(conn)
// ANCHOR: create_consumer
// create consumer
wsUrl := "ws://127.0.0.1:6041"
groupID = "group1"
clientID = "client1"
host = "127.0.0.1"
consumer, err := tmq.NewConsumer(&tmqcommon.ConfigMap{
"ws.url": wsUrl,
"ws.message.channelLen": uint(0),
"ws.message.timeout": common.DefaultMessageTimeout,
"ws.message.writeWait": common.DefaultWriteWait,
"td.connect.user": "root",
"td.connect.pass": "taosdata",
"auto.offset.reset": "latest",
"msg.with.table.name": "true",
"enable.auto.commit": "true",
"auto.commit.interval.ms": "1000",
"group.id": groupID,
"client.id": clientID,
})
if err != nil {
log.Fatalf(
"Failed to create websocket consumer, host: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
host,
groupID,
clientID,
err.Error(),
)
}
log.Printf("Create consumer successfully, host: %s, groupId: %s, clientId: %s\n", host, groupID, clientID)
// ANCHOR_END: create_consumer
// ANCHOR: subscribe
topic = "topic_meters"
err = consumer.Subscribe(topic, nil)
if err != nil {
log.Fatalf(
"Failed to subscribe topic_meters, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
topic,
groupID,
clientID,
err.Error(),
)
}
log.Println("Subscribe topics successfully")
for i := 0; i < 50; i++ {
ev := consumer.Poll(100)
if ev != nil {
switch e := ev.(type) {
case *tmqcommon.DataMessage:
// process your data here
fmt.Printf("data:%v\n", e)
// ANCHOR: commit_offset
// commit offset
_, err = consumer.CommitOffsets([]tmqcommon.TopicPartition{e.TopicPartition})
if err != nil {
log.Fatalf(
"Failed to commit offset, topic: %s, groupId: %s, clientId: %s, offset %s, ErrMessage: %s\n",
topic,
groupID,
clientID,
e.TopicPartition,
err.Error(),
)
}
log.Println("Commit offset manually successfully.")
// ANCHOR_END: commit_offset
case tmqcommon.Error:
log.Fatalf(
"Failed to poll data, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
topic,
groupID,
clientID,
e.Error(),
)
}
}
}
// ANCHOR_END: subscribe
// ANCHOR: seek
// get assignment
partitions, err := consumer.Assignment()
if err != nil {
log.Fatalf(
"Failed to get assignment, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
topic,
groupID,
clientID,
err.Error(),
)
}
fmt.Println("Now assignment:", partitions)
for i := 0; i < len(partitions); i++ {
// seek to the beginning
err = consumer.Seek(tmqcommon.TopicPartition{
Topic: partitions[i].Topic,
Partition: partitions[i].Partition,
Offset: 0,
}, 0)
if err != nil {
log.Fatalf(
"Failed to seek offset, topic: %s, groupId: %s, clientId: %s, partition: %d, offset: %d, ErrMessage: %s\n",
topic,
groupID,
clientID,
partitions[i].Partition,
0,
err.Error(),
)
}
}
fmt.Println("Assignment seek to beginning successfully")
// ANCHOR_END: seek
// ANCHOR: close
// unsubscribe
err = consumer.Unsubscribe()
if err != nil {
log.Fatalf(
"Failed to unsubscribe consumer, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
topic,
groupID,
clientID,
err.Error(),
)
}
fmt.Println("Consumer unsubscribed successfully.")
// close consumer
err = consumer.Close()
if err != nil {
log.Fatalf(
"Failed to close consumer, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
topic,
groupID,
clientID,
err.Error(),
)
}
fmt.Println("Consumer closed successfully.")
// ANCHOR_END: close
<-done
}
func initEnv(conn *sql.DB) {
_, err := conn.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatal("Failed to create database, ErrMessage: " + err.Error())
}
_, err = conn.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatal("Failed to create stable, ErrMessage: " + err.Error())
}
_, err = conn.Exec("CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM power.meters")
if err != nil {
log.Fatal("Failed to create topic, ErrMessage: " + err.Error())
}
go func() {
for i := 0; i < 10; i++ {
time.Sleep(time.Second)
_, err = conn.Exec("INSERT INTO power.d1001 USING power.meters TAGS (2, 'California.SanFrancisco') VALUES (NOW , 10.2, 219, 0.32)")
if err != nil {
log.Fatal("Failed to insert data, ErrMessage: " + err.Error())
}
}
done <- struct{}{}
}()
}

18
docs/examples/java/pom.xml
View File

@ -25,6 +25,24 @@
<version>3.3.0</version>
</dependency>
<!-- ANCHOR_END: dep-->
<!-- druid -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.17</version>
</dependency>
<!-- HikariCP -->
<dependency>
<groupId>com.zaxxer</groupId>
<artifactId>HikariCP</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>org.locationtech.jts</groupId>
<artifactId>jts-core</artifactId>
<version>1.19.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>

134
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/ConsumerLoopFull.java → docs/examples/java/src/main/java/com/taos/example/ConsumerLoopFull.java
View File

@ -1,4 +1,4 @@
package com.taosdata.example;
package com.taos.example;
import com.alibaba.fastjson.JSON;
import com.taosdata.jdbc.TSDBDriver;
@ -19,8 +19,10 @@ public class ConsumerLoopFull {
static private Connection connection;
static private Statement statement;
static private volatile boolean stopThread = false;
static private String groupId = "group1";
static private String clientId = "clinet1";
public static TaosConsumer<ResultBean> getConsumer() throws SQLException {
public static TaosConsumer<ResultBean> getConsumer() throws Exception {
// ANCHOR: create_consumer
Properties config = new Properties();
config.setProperty("td.connect.type", "jni");
@ -30,33 +32,38 @@ public class ConsumerLoopFull {
config.setProperty("enable.auto.commit", "true");
config.setProperty("auto.commit.interval.ms", "1000");
config.setProperty("group.id", "group1");
config.setProperty("client.id", "1");
config.setProperty("client.id", "clinet1");
config.setProperty("td.connect.user", "root");
config.setProperty("td.connect.pass", "taosdata");
config.setProperty("value.deserializer", "com.taosdata.example.ConsumerLoopFull$ResultDeserializer");
config.setProperty("value.deserializer", "com.taos.example.ConsumerLoopFull$ResultDeserializer");
config.setProperty("value.deserializer.encoding", "UTF-8");
try {
TaosConsumer<ResultBean> consumer= new TaosConsumer<>(config);
System.out.println("Create consumer successfully, host: " + config.getProperty("bootstrap.servers") + ", groupId: " + config.getProperty("group.id") + ", clientId: " + config.getProperty("client.id"));
System.out.printf("Create consumer successfully, host: %s, groupId: %s, clientId: %s%n",
config.getProperty("bootstrap.servers"),
config.getProperty("group.id"),
config.getProperty("client.id"));
return consumer;
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to create native consumer, host: " + config.getProperty("bootstrap.servers") + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create consumer", ex);
} catch (Exception ex) {
System.out.println("Failed to create native consumer, host: " + config.getProperty("bootstrap.servers")
+ "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create consumer", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create native consumer, host: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
config.getProperty("bootstrap.servers"),
config.getProperty("group.id"),
config.getProperty("client.id"),
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: create_consumer
}
public static void pollExample(TaosConsumer<ResultBean> consumer) throws SQLException {
// ANCHOR: poll_data_code_piece
List<String> topics = Collections.singletonList("topic_meters");
try {
List<String> topics = Collections.singletonList("topic_meters");
// subscribe to the topics
consumer.subscribe(topics);
System.out.println("Subscribe topics successfully.");
@ -65,27 +72,29 @@ public class ConsumerLoopFull {
ConsumerRecords<ResultBean> records = consumer.poll(Duration.ofMillis(100));
for (ConsumerRecord<ResultBean> record : records) {
ResultBean bean = record.value();
// process the data here
// Add your data processing logic here
System.out.println("data: " + JSON.toJSONString(bean));
}
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to poll data, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to poll data", ex);
} catch (Exception ex) {
System.out.println("Failed to poll data, ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to poll data", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to poll data, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
topics.get(0),
groupId,
clientId,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: poll_data_code_piece
}
public static void seekExample(TaosConsumer<ResultBean> consumer) throws SQLException {
// ANCHOR: consumer_seek
List<String> topics = Collections.singletonList("topic_meters");
try {
List<String> topics = Collections.singletonList("topic_meters");
// subscribe to the topics
consumer.subscribe(topics);
System.out.println("Subscribe topics successfully.");
@ -100,13 +109,17 @@ public class ConsumerLoopFull {
consumer.seekToBeginning(assignment);
System.out.println("Assignment seek to beginning successfully.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Seek example failed; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("seek example failed", ex);
} catch (Exception ex) {
System.out.println("Seek example failed; ErrMessage: " + ex.getMessage());
throw new SQLException("seek example failed", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to seek offset, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
topics.get(0),
groupId,
clientId,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: consumer_seek
}
@ -114,15 +127,14 @@ public class ConsumerLoopFull {
public static void commitExample(TaosConsumer<ResultBean> consumer) throws SQLException {
// ANCHOR: commit_code_piece
List<String> topics = Collections.singletonList("topic_meters");
try {
List<String> topics = Collections.singletonList("topic_meters");
consumer.subscribe(topics);
for (int i = 0; i < 50; i++) {
ConsumerRecords<ResultBean> records = consumer.poll(Duration.ofMillis(100));
for (ConsumerRecord<ResultBean> record : records) {
ResultBean bean = record.value();
// process your data here
// Add your data processing logic here
System.out.println("data: " + JSON.toJSONString(bean));
}
if (!records.isEmpty()) {
@ -131,13 +143,17 @@ public class ConsumerLoopFull {
System.out.println("Commit offset manually successfully.");
}
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to execute consumer functions. ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to execute consumer functions", ex);
} catch (Exception ex) {
System.out.println("Failed to execute consumer functions. ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to execute consumer functions", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to commit offset, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
topics.get(0),
groupId,
clientId,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: commit_code_piece
}
@ -150,13 +166,17 @@ public class ConsumerLoopFull {
// unsubscribe the consumer
consumer.unsubscribe();
System.out.println("Consumer unsubscribed successfully.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to unsubscribe consumer. ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to unsubscribe consumer", ex);
} catch (Exception ex) {
System.out.println("Failed to unsubscribe consumer. ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to unsubscribe consumer", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to unsubscribe consumer, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
topics.get(0),
groupId,
clientId,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
finally {
// close the consumer
@ -238,9 +258,14 @@ public class ConsumerLoopFull {
i++;
Thread.sleep(1);
}
} catch (SQLException ex) {
System.out.println("Failed to insert data to power.meters, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to insert data to power.meters", ex);
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data to power.meters, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
@ -250,9 +275,14 @@ public class ConsumerLoopFull {
statement.executeUpdate("USE power");
statement.executeUpdate("CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
statement.executeUpdate("CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM meters");
} catch (SQLException ex) {
System.out.println("Failed to create db and table, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create db and table", ex);
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create db and table, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
@ -311,7 +341,7 @@ public class ConsumerLoopFull {
try {
prepareData();
} catch (SQLException ex) {
System.out.println("Failed to prepare data, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
System.out.println("Failed to prepare data, ErrCode:" + ex.getErrorCode() + ", ErrMessage: " + ex.getMessage());
return;
} catch (Exception ex) {
System.out.println("Failed to prepare data, ErrMessage: " + ex.getMessage());

36
docs/examples/java/src/main/java/com/taos/example/DruidDemo.java Normal file
View File

@ -0,0 +1,36 @@
package com.taosdata.example;
import com.alibaba.druid.pool.DruidDataSource;
import java.sql.Connection;
import java.sql.Statement;
public class DruidDemo {
// ANCHOR: connection_pool
public static void main(String[] args) throws Exception {
String url = "jdbc:TAOS://127.0.0.1:6030/log";
DruidDataSource dataSource = new DruidDataSource();
// jdbc properties
dataSource.setDriverClassName("com.taosdata.jdbc.TSDBDriver");
dataSource.setUrl(url);
dataSource.setUsername("root");
dataSource.setPassword("taosdata");
// pool configurations
dataSource.setInitialSize(10);
dataSource.setMinIdle(10);
dataSource.setMaxActive(10);
dataSource.setMaxWait(30000);
dataSource.setValidationQuery("SELECT SERVER_VERSION()");
Connection connection = dataSource.getConnection(); // get connection
Statement statement = connection.createStatement(); // get statement
// query or insert
// ...
statement.close();
connection.close(); // put back to connection pool
dataSource.close();
}
// ANCHOR_END: connection_pool
}

190
docs/examples/java/src/main/java/com/taos/example/GeometryDemo.java Normal file
View File

@ -0,0 +1,190 @@
package com.taos.example;
import com.taosdata.jdbc.TSDBPreparedStatement;
import org.locationtech.jts.geom.*;
import org.locationtech.jts.io.ByteOrderValues;
import org.locationtech.jts.io.ParseException;
import org.locationtech.jts.io.WKBReader;
import org.locationtech.jts.io.WKBWriter;
import java.sql.*;
import java.util.ArrayList;
import java.util.Properties;
public class GeometryDemo {
private static String host = "localhost";
private static final String dbName = "test";
private static final String tbName = "weather";
private static final String user = "root";
private static final String password = "taosdata";
private Connection connection;
public static void main(String[] args) throws SQLException {
for (int i = 0; i < args.length; i++) {
if ("-host".equalsIgnoreCase(args[i]) && i < args.length - 1)
host = args[++i];
}
if (host == null) {
printHelp();
}
GeometryDemo demo = new GeometryDemo();
demo.init();
demo.createDatabase();
demo.useDatabase();
demo.dropTable();
demo.createTable();
demo.insert();
demo.stmtInsert();
demo.select();
demo.dropTable();
demo.close();
}
private void init() {
final String url = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
// get connection
try {
Properties properties = new Properties();
properties.setProperty("charset", "UTF-8");
properties.setProperty("locale", "en_US.UTF-8");
properties.setProperty("timezone", "UTC-8");
System.out.println("get connection starting...");
connection = DriverManager.getConnection(url, properties);
if (connection != null)
System.out.println("[ OK ] Connection established.");
} catch (SQLException e) {
e.printStackTrace();
}
}
private void createDatabase() {
String sql = "create database if not exists " + dbName;
execute(sql);
}
private void useDatabase() {
String sql = "use " + dbName;
execute(sql);
}
private void dropTable() {
final String sql = "drop table if exists " + dbName + "." + tbName + "";
execute(sql);
}
private void createTable() {
final String sql = "create table if not exists " + dbName + "." + tbName + " (ts timestamp, temperature float, humidity int, location geometry(50))";
execute(sql);
}
private void insert() {
final String sql = "insert into " + dbName + "." + tbName + " (ts, temperature, humidity, location) values(now, 20.5, 34, 'POINT(1 2)')";
execute(sql);
}
private void stmtInsert() throws SQLException {
TSDBPreparedStatement preparedStatement = (TSDBPreparedStatement) connection.prepareStatement("insert into " + dbName + "." + tbName + " values (?, ?, ?, ?)");
long current = System.currentTimeMillis();
ArrayList<Long> tsList = new ArrayList<>();
tsList.add(current);
tsList.add(current + 1);
preparedStatement.setTimestamp(0, tsList);
ArrayList<Float> tempList = new ArrayList<>();
tempList.add(20.1F);
tempList.add(21.2F);
preparedStatement.setFloat(1, tempList);
ArrayList<Integer> humList = new ArrayList<>();
humList.add(30);
humList.add(31);
preparedStatement.setInt(2, humList);
ArrayList<byte[]> list = new ArrayList<>();
GeometryFactory gf = new GeometryFactory();
Point p1 = gf.createPoint(new Coordinate(1,2));
p1.setSRID(1234);
// NOTE: TDengine current version only support 2D dimension and little endian byte order
WKBWriter w = new WKBWriter(2, ByteOrderValues.LITTLE_ENDIAN, true);
byte[] wkb = w.write(p1);
list.add(wkb);
Coordinate[] coordinates = { new Coordinate(10, 20),
new Coordinate(30, 40)};
LineString lineString = gf.createLineString(coordinates);
lineString.setSRID(2345);
byte[] wkb2 = w.write(lineString);
list.add(wkb2);
preparedStatement.setGeometry(3, list, 50);
preparedStatement.columnDataAddBatch();
preparedStatement.columnDataExecuteBatch();
}
private void select() {
final String sql = "select * from " + dbName + "." + tbName;
executeQuery(sql);
}
private void close() {
try {
if (connection != null) {
this.connection.close();
System.out.println("connection closed.");
}
} catch (SQLException e) {
e.printStackTrace();
}
}
private void executeQuery(String sql) {
long start = System.currentTimeMillis();
try (Statement statement = connection.createStatement()) {
ResultSet resultSet = statement.executeQuery(sql);
long end = System.currentTimeMillis();
printSql(sql, true, (end - start));
while (resultSet.next()){
byte[] result1 = resultSet.getBytes(4);
WKBReader reader = new WKBReader();
Geometry g1 = reader.read(result1);
System.out.println("GEO OBJ: " + g1 + ", SRID: " + g1.getSRID());
}
} catch (SQLException e) {
long end = System.currentTimeMillis();
printSql(sql, false, (end - start));
e.printStackTrace();
} catch (ParseException e) {
throw new RuntimeException(e);
}
}
private void printSql(String sql, boolean succeed, long cost) {
System.out.println("[ " + (succeed ? "OK" : "ERROR!") + " ] time cost: " + cost + " ms, execute statement ====> " + sql);
}
private void execute(String sql) {
long start = System.currentTimeMillis();
try (Statement statement = connection.createStatement()) {
boolean execute = statement.execute(sql);
long end = System.currentTimeMillis();
printSql(sql, true, (end - start));
} catch (SQLException e) {
long end = System.currentTimeMillis();
printSql(sql, false, (end - start));
e.printStackTrace();
}
}
private static void printHelp() {
System.out.println("Usage: java -jar JDBCDemo.jar -host <hostname>");
System.exit(0);
}
}

37
docs/examples/java/src/main/java/com/taos/example/HikariDemo.java Normal file
View File

@ -0,0 +1,37 @@
package com.taosdata.example;
import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import java.sql.Connection;
import java.sql.Statement;
public class HikariDemo {
// ANCHOR: connection_pool
public static void main(String[] args) throws Exception {
HikariConfig config = new HikariConfig();
// jdbc properties
config.setJdbcUrl("jdbc:TAOS://127.0.0.1:6030/log");
config.setUsername("root");
config.setPassword("taosdata");
// connection pool configurations
config.setMinimumIdle(10); // minimum number of idle connection
config.setMaximumPoolSize(10); // maximum number of connection in the pool
config.setConnectionTimeout(30000); // maximum wait milliseconds for get connection from pool
config.setMaxLifetime(0); // maximum life time for each connection
config.setIdleTimeout(0); // max idle time for recycle idle connection
config.setConnectionTestQuery("SELECT SERVER_VERSION()"); // validation query
HikariDataSource dataSource = new HikariDataSource(config); // create datasource
Connection connection = dataSource.getConnection(); // get connection
Statement statement = connection.createStatement(); // get statement
// query or insert
// ...
statement.close();
connection.close(); // put back to connection pool
dataSource.close();
}
// ANCHOR_END: connection_pool
}

48
docs/examples/java/src/main/java/com/taos/example/JNIConnectExample.java
View File

@ -8,31 +8,33 @@ import java.util.Properties;
import com.taosdata.jdbc.TSDBDriver;
public class JNIConnectExample {
// ANCHOR: main
public static void main(String[] args) throws SQLException {
// use
// String jdbcUrl = "jdbc:TAOS://localhost:6030/dbName?user=root&password=taosdata";
// if you want to connect a specified database named "dbName".
String jdbcUrl = "jdbc:TAOS://localhost:6030?user=root&password=taosdata";
Properties connProps = new Properties();
connProps.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
connProps.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
connProps.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
// ANCHOR: main
public static void main(String[] args) throws Exception {
// use
// String jdbcUrl =
// "jdbc:TAOS://localhost:6030/dbName?user=root&password=taosdata";
// if you want to connect a specified database named "dbName".
String jdbcUrl = "jdbc:TAOS://localhost:6030?user=root&password=taosdata";
Properties connProps = new Properties();
connProps.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
connProps.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
connProps.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
try (Connection conn = DriverManager.getConnection(jdbcUrl, connProps)) {
System.out.println("Connected to " + jdbcUrl + " successfully.");
try (Connection conn = DriverManager.getConnection(jdbcUrl, connProps)) {
System.out.println("Connected to " + jdbcUrl + " successfully.");
// you can use the connection for execute SQL here
// you can use the connection for execute SQL here
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to connect to " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to connect to " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to connect to %s, %sErrMessage: %s%n",
jdbcUrl,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
// ANCHOR_END: main
}
// ANCHOR_END: main
}

125
docs/examples/java/src/main/java/com/taos/example/JdbcBasicDemo.java Normal file
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@ -0,0 +1,125 @@
package com.taos.example;
import com.taosdata.jdbc.AbstractStatement;
import java.sql.*;
import java.util.Properties;
public class JdbcBasicDemo {
private static final String host = "localhost";
private static final String dbName = "test";
private static final String tbName = "weather";
private static final String user = "root";
private static final String password = "taosdata";
public static void main(String[] args) throws SQLException {
final String url = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
// get connection
Properties properties = new Properties();
properties.setProperty("charset", "UTF-8");
properties.setProperty("locale", "en_US.UTF-8");
properties.setProperty("timezone", "UTC-8");
System.out.println("get connection starting...");
try (Connection connection = DriverManager.getConnection(url, properties)) {
if (connection != null) {
System.out.println("[ OK ] Connection established.");
} else {
System.out.println("[ ERR ] Connection can not be established.");
return;
}
Statement stmt = connection.createStatement();
// ANCHOR: create_db_and_table
// create database
stmt.executeUpdate("CREATE DATABASE IF NOT EXISTS power");
// use database
stmt.executeUpdate("USE power");
// create table
stmt.executeUpdate("CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
// ANCHOR_END: create_db_and_table
// ANCHOR: insert_data
// insert data
String insertQuery = "INSERT INTO " +
"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 219, 0.31000) " +
"(NOW + 2a, 12.60000, 218, 0.33000) " +
"(NOW + 3a, 12.30000, 221, 0.31000) " +
"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 218, 0.25000) ";
int affectedRows = stmt.executeUpdate(insertQuery);
System.out.println("insert " + affectedRows + " rows.");
// ANCHOR_END: insert_data
// ANCHOR: query_data
// query data
ResultSet resultSet = stmt.executeQuery("SELECT * FROM meters");
Timestamp ts;
float current;
String location;
while (resultSet.next()) {
ts = resultSet.getTimestamp(1);
current = resultSet.getFloat(2);
location = resultSet.getString("location");
System.out.printf("%s, %f, %s\n", ts, current, location);
}
// ANCHOR_END: query_data
// ANCHOR: with_reqid
AbstractStatement aStmt = (AbstractStatement) connection.createStatement();
aStmt.execute("CREATE DATABASE IF NOT EXISTS power", 1L);
aStmt.executeUpdate("USE power", 2L);
try (ResultSet rs = aStmt.executeQuery("SELECT * FROM meters limit 1", 3L)) {
while (rs.next()) {
Timestamp timestamp = rs.getTimestamp(1);
System.out.println("timestamp = " + timestamp);
}
}
aStmt.close();
// ANCHOR_END: with_reqid
String sql = "SELECT * FROM meters limit 2;";
// ANCHOR: jdbc_exception
try (Statement statement = connection.createStatement();
// executeQuery
ResultSet tempResultSet = statement.executeQuery(sql)) {
// print result
printResult(tempResultSet);
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to execute statement, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: jdbc_exception
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Error Code: " + ex.getErrorCode());
System.out.println("Message: " + ex.getMessage());
}
}
private static void printResult(ResultSet resultSet) throws SQLException {
Util.printResult(resultSet);
}
}

18
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcCreatDBDemo.java → docs/examples/java/src/main/java/com/taos/example/JdbcCreatDBDemo.java
View File

@ -1,6 +1,4 @@
package com.taosdata.example;
import com.taosdata.jdbc.AbstractStatement;
package com.taos.example;
import java.sql.*;
import java.util.Properties;
@ -35,13 +33,13 @@ public class JdbcCreatDBDemo {
rowsAffected = stmt.executeUpdate("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
// you can check rowsAffected here
System.out.println("Create stable power.meters successfully, rowsAffected: " + rowsAffected);
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to create db and table, url:" + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to create db and table, url:" + jdbcUrl + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create database power or stable meters, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: create_db_and_table

56
docs/examples/java/src/main/java/com/taos/example/JdbcInsertDataDemo.java Normal file
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@ -0,0 +1,56 @@
package com.taos.example;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
public class JdbcInsertDataDemo {
private static final String host = "localhost";
private static final String dbName = "test";
private static final String tbName = "weather";
private static final String user = "root";
private static final String password = "taosdata";
public static void main(String[] args) throws SQLException {
final String jdbcUrl = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
// get connection
Properties properties = new Properties();
properties.setProperty("charset", "UTF-8");
properties.setProperty("locale", "en_US.UTF-8");
properties.setProperty("timezone", "UTC-8");
System.out.println("get connection starting...");
// ANCHOR: insert_data
// insert data, please make sure the database and table are created before
String insertQuery = "INSERT INTO " +
"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 219, 0.31000) " +
"(NOW + 2a, 12.60000, 218, 0.33000) " +
"(NOW + 3a, 12.30000, 221, 0.31000) " +
"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 218, 0.25000) ";
try (Connection connection = DriverManager.getConnection(jdbcUrl, properties);
Statement stmt = connection.createStatement()) {
int affectedRows = stmt.executeUpdate(insertQuery);
// you can check affectedRows here
System.out.println("Successfully inserted " + affectedRows + " rows to power.meters.");
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data to power.meters, sql: %s, %sErrMessage: %s%n",
insertQuery,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: insert_data
}
}

26
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcQueryDemo.java → docs/examples/java/src/main/java/com/taos/example/JdbcQueryDemo.java
View File

@ -1,6 +1,4 @@
package com.taosdata.example;
import com.taosdata.jdbc.AbstractStatement;
package com.taos.example;
import java.sql.*;
import java.util.Properties;
@ -24,10 +22,11 @@ public class JdbcQueryDemo {
properties.setProperty("timezone", "UTC-8");
System.out.println("get connection starting...");
// ANCHOR: query_data
String sql = "SELECT ts, current, location FROM power.meters limit 100";
try (Connection connection = DriverManager.getConnection(jdbcUrl, properties);
Statement stmt = connection.createStatement();
// query data, make sure the database and table are created before
ResultSet resultSet = stmt.executeQuery("SELECT ts, current, location FROM power.meters limit 100")) {
ResultSet resultSet = stmt.executeQuery(sql)) {
Timestamp ts;
float current;
@ -41,19 +40,16 @@ public class JdbcQueryDemo {
// you can check data here
System.out.printf("ts: %s, current: %f, location: %s %n", ts, current, location);
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to query data from power.meters, url:" + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to query data from power.meters, url:" + jdbcUrl + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to query data from power.meters, sql: %s, %sErrMessage: %s%n",
sql,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: query_data
}
private static void printResult(ResultSet resultSet) throws SQLException {
Util.printResult(resultSet);
}
}

15
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcReqIdDemo.java → docs/examples/java/src/main/java/com/taos/example/JdbcReqIdDemo.java
View File

@ -1,4 +1,4 @@
package com.taosdata.example;
package com.taos.example;
import com.taosdata.jdbc.AbstractStatement;
@ -45,12 +45,13 @@ public class JdbcReqIdDemo {
}
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to execute sql with reqId: " + reqId + ", url:" + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to execute sql with reqId: " + reqId + ", url:" + jdbcUrl + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to execute sql with reqId: %s, %sErrMessage: %s%n", reqId,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: with_reqid

15
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/ParameterBindingBasicDemo.java → docs/examples/java/src/main/java/com/taos/example/ParameterBindingBasicDemo.java
View File

@ -1,4 +1,4 @@
package com.taosdata.example;
package com.taos.example;
import com.taosdata.jdbc.TSDBPreparedStatement;
@ -68,12 +68,13 @@ public class ParameterBindingBasicDemo {
// you can check exeResult here
System.out.println("Successfully inserted " + (numOfSubTable * numOfRow) + " rows to power.meters.");
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert to table meters using stmt, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}

325
docs/examples/java/src/main/java/com/taos/example/ParameterBindingFullDemo.java Normal file
View File

@ -0,0 +1,325 @@
package com.taos.example;
import com.taosdata.jdbc.TSDBPreparedStatement;
import com.taosdata.jdbc.utils.StringUtils;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
// ANCHOR: para_bind
public class ParameterBindingFullDemo {
private static final String host = "127.0.0.1";
private static final Random random = new Random(System.currentTimeMillis());
private static final int BINARY_COLUMN_SIZE = 50;
private static final String[] schemaList = {
"create table stable1(ts timestamp, f1 tinyint, f2 smallint, f3 int, f4 bigint) tags(t1 tinyint, t2 smallint, t3 int, t4 bigint)",
"create table stable2(ts timestamp, f1 float, f2 double) tags(t1 float, t2 double)",
"create table stable3(ts timestamp, f1 bool) tags(t1 bool)",
"create table stable4(ts timestamp, f1 binary(" + BINARY_COLUMN_SIZE + ")) tags(t1 binary(" + BINARY_COLUMN_SIZE + "))",
"create table stable5(ts timestamp, f1 nchar(" + BINARY_COLUMN_SIZE + ")) tags(t1 nchar(" + BINARY_COLUMN_SIZE + "))",
"create table stable6(ts timestamp, f1 varbinary(" + BINARY_COLUMN_SIZE + ")) tags(t1 varbinary(" + BINARY_COLUMN_SIZE + "))",
"create table stable7(ts timestamp, f1 geometry(" + BINARY_COLUMN_SIZE + ")) tags(t1 geometry(" + BINARY_COLUMN_SIZE + "))",
};
private static final int numOfSubTable = 10, numOfRow = 10;
public static void main(String[] args) throws SQLException {
String jdbcUrl = "jdbc:TAOS://" + host + ":6030/";
try (Connection conn = DriverManager.getConnection(jdbcUrl, "root", "taosdata")) {
init(conn);
bindInteger(conn);
bindFloat(conn);
bindBoolean(conn);
bindBytes(conn);
bindString(conn);
bindVarbinary(conn);
bindGeometry(conn);
clean(conn);
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
throw ex;
}
}
private static void init(Connection conn) throws SQLException {
clean(conn);
try (Statement stmt = conn.createStatement()) {
stmt.execute("create database if not exists test_parabind");
stmt.execute("use test_parabind");
for (int i = 0; i < schemaList.length; i++) {
stmt.execute(schemaList[i]);
}
}
}
private static void clean(Connection conn) throws SQLException {
try (Statement stmt = conn.createStatement()) {
stmt.execute("drop database if exists test_parabind");
}
}
private static void bindInteger(Connection conn) throws SQLException {
String sql = "insert into ? using stable1 tags(?,?,?,?) values(?,?,?,?,?)";
try (TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t1_" + i);
// set tags
pstmt.setTagByte(0, Byte.parseByte(Integer.toString(random.nextInt(Byte.MAX_VALUE))));
pstmt.setTagShort(1, Short.parseShort(Integer.toString(random.nextInt(Short.MAX_VALUE))));
pstmt.setTagInt(2, random.nextInt(Integer.MAX_VALUE));
pstmt.setTagLong(3, random.nextLong());
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<Byte> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f1List.add(Byte.parseByte(Integer.toString(random.nextInt(Byte.MAX_VALUE))));
pstmt.setByte(1, f1List);
ArrayList<Short> f2List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f2List.add(Short.parseShort(Integer.toString(random.nextInt(Short.MAX_VALUE))));
pstmt.setShort(2, f2List);
ArrayList<Integer> f3List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f3List.add(random.nextInt(Integer.MAX_VALUE));
pstmt.setInt(3, f3List);
ArrayList<Long> f4List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f4List.add(random.nextLong());
pstmt.setLong(4, f4List);
// add column
pstmt.columnDataAddBatch();
}
// execute column
pstmt.columnDataExecuteBatch();
}
}
private static void bindFloat(Connection conn) throws SQLException {
String sql = "insert into ? using stable2 tags(?,?) values(?,?,?)";
TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class);
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t2_" + i);
// set tags
pstmt.setTagFloat(0, random.nextFloat());
pstmt.setTagDouble(1, random.nextDouble());
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<Float> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f1List.add(random.nextFloat());
pstmt.setFloat(1, f1List);
ArrayList<Double> f2List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f2List.add(random.nextDouble());
pstmt.setDouble(2, f2List);
// add column
pstmt.columnDataAddBatch();
}
// execute
pstmt.columnDataExecuteBatch();
// close if no try-with-catch statement is used
pstmt.close();
}
private static void bindBoolean(Connection conn) throws SQLException {
String sql = "insert into ? using stable3 tags(?) values(?,?)";
try (TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t3_" + i);
// set tags
pstmt.setTagBoolean(0, random.nextBoolean());
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<Boolean> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f1List.add(random.nextBoolean());
pstmt.setBoolean(1, f1List);
// add column
pstmt.columnDataAddBatch();
}
// execute
pstmt.columnDataExecuteBatch();
}
}
private static void bindBytes(Connection conn) throws SQLException {
String sql = "insert into ? using stable4 tags(?) values(?,?)";
try (TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t4_" + i);
// set tags
pstmt.setTagString(0, new String("abc"));
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<String> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++) {
f1List.add(new String("abc"));
}
pstmt.setString(1, f1List, BINARY_COLUMN_SIZE);
// add column
pstmt.columnDataAddBatch();
}
// execute
pstmt.columnDataExecuteBatch();
}
}
private static void bindString(Connection conn) throws SQLException {
String sql = "insert into ? using stable5 tags(?) values(?,?)";
try (TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t5_" + i);
// set tags
pstmt.setTagNString(0, "California.SanFrancisco");
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<String> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++) {
f1List.add("California.LosAngeles");
}
pstmt.setNString(1, f1List, BINARY_COLUMN_SIZE);
// add column
pstmt.columnDataAddBatch();
}
// execute
pstmt.columnDataExecuteBatch();
}
}
private static void bindVarbinary(Connection conn) throws SQLException {
String sql = "insert into ? using stable6 tags(?) values(?,?)";
try (TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t6_" + i);
// set tags
byte[] bTag = new byte[]{0,2,3,4,5};
bTag[0] = (byte) i;
pstmt.setTagVarbinary(0, bTag);
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<byte[]> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++) {
byte[] v = new byte[]{0,2,3,4,5,6};
v[0] = (byte)j;
f1List.add(v);
}
pstmt.setVarbinary(1, f1List, BINARY_COLUMN_SIZE);
// add column
pstmt.columnDataAddBatch();
}
// execute
pstmt.columnDataExecuteBatch();
}
}
private static void bindGeometry(Connection conn) throws SQLException {
String sql = "insert into ? using stable7 tags(?) values(?,?)";
try (TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class)) {
byte[] g1 = StringUtils.hexToBytes("0101000000000000000000F03F0000000000000040");
byte[] g2 = StringUtils.hexToBytes("0102000020E610000002000000000000000000F03F000000000000004000000000000008400000000000001040");
List<byte[]> listGeo = new ArrayList<>();
listGeo.add(g1);
listGeo.add(g2);
for (int i = 1; i <= 2; i++) {
// set table name
pstmt.setTableName("t7_" + i);
// set tags
pstmt.setTagGeometry(0, listGeo.get(i - 1));
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<byte[]> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++) {
f1List.add(listGeo.get(i - 1));
}
pstmt.setGeometry(1, f1List, BINARY_COLUMN_SIZE);
// add column
pstmt.columnDataAddBatch();
}
// execute
pstmt.columnDataExecuteBatch();
}
}
}
// ANCHOR_END: para_bind

32
docs/examples/java/src/main/java/com/taos/example/RESTConnectExample.java
View File

@ -5,22 +5,24 @@ import java.sql.DriverManager;
import java.sql.SQLException;
public class RESTConnectExample {
// ANCHOR: main
public static void main(String[] args) throws SQLException {
String jdbcUrl = "jdbc:TAOS-RS://localhost:6041?user=root&password=taosdata";
try (Connection conn = DriverManager.getConnection(jdbcUrl)){
System.out.println("Connected to " + jdbcUrl + " successfully.");
// ANCHOR: main
public static void main(String[] args) throws Exception {
String jdbcUrl = "jdbc:TAOS-RS://localhost:6041?user=root&password=taosdata";
try (Connection conn = DriverManager.getConnection(jdbcUrl)) {
System.out.println("Connected to " + jdbcUrl + " successfully.");
// you can use the connection for execute SQL here
// you can use the connection for execute SQL here
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to connect to " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to connect to " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to connect to %s, %sErrMessage: %s%n",
jdbcUrl,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
// ANCHOR_END: main
}
// ANCHOR_END: main
}

15
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/SchemalessJniTest.java → docs/examples/java/src/main/java/com/taos/example/SchemalessJniTest.java
View File

@ -1,4 +1,4 @@
package com.taosdata.example;
package com.taos.example;
import com.taosdata.jdbc.AbstractConnection;
import com.taosdata.jdbc.enums.SchemalessProtocolType;
@ -26,12 +26,13 @@ public class SchemalessJniTest {
conn.write(telnetDemo, SchemalessProtocolType.TELNET, SchemalessTimestampType.MILLI_SECONDS);
conn.write(jsonDemo, SchemalessProtocolType.JSON, SchemalessTimestampType.NOT_CONFIGURED);
System.out.println("Inserted data with schemaless successfully.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert data with schemaless, host:" + host + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert data with schemaless, host:" + host + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data with schemaless, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}

15
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/SchemalessWsTest.java → docs/examples/java/src/main/java/com/taos/example/SchemalessWsTest.java
View File

@ -1,4 +1,4 @@
package com.taosdata.example;
package com.taos.example;
import com.taosdata.jdbc.AbstractConnection;
import com.taosdata.jdbc.enums.SchemalessProtocolType;
@ -26,12 +26,13 @@ public class SchemalessWsTest {
conn.write(telnetDemo, SchemalessProtocolType.TELNET, SchemalessTimestampType.MILLI_SECONDS);
conn.write(jsonDemo, SchemalessProtocolType.JSON, SchemalessTimestampType.SECONDS);
System.out.println("Inserted data with schemaless successfully.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert data with schemaless, host:" + host + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert data with schemaless, host:" + host + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data with schemaless, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}

25
docs/examples/java/src/main/java/com/taos/example/Util.java Normal file
View File

@ -0,0 +1,25 @@
package com.taos.example;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
public class Util {
public static void printResult(ResultSet resultSet) throws SQLException {
ResultSetMetaData metaData = resultSet.getMetaData();
for (int i = 1; i <= metaData.getColumnCount(); i++) {
String columnLabel = metaData.getColumnLabel(i);
System.out.printf(" %s |", columnLabel);
}
System.out.println();
System.out.println("-------------------------------------------------------------");
while (resultSet.next()) {
for (int i = 1; i <= metaData.getColumnCount(); i++) {
String value = resultSet.getString(i);
System.out.printf("%s, ", value);
}
System.out.println();
}
}
}

16
docs/examples/java/src/main/java/com/taos/example/WSConnectExample.java
View File

@ -9,7 +9,7 @@ import java.util.Properties;
public class WSConnectExample {
// ANCHOR: main
public static void main(String[] args) throws SQLException {
public static void main(String[] args) throws Exception {
// use
// String jdbcUrl =
// "jdbc:TAOS-RS://localhost:6041/dbName?user=root&password=taosdata&batchfetch=true";
@ -25,14 +25,14 @@ public class WSConnectExample {
// you can use the connection for execute SQL here
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed
// exceptions info
System.out.println("Failed to connect to " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: "
+ ex.getMessage());
throw ex;
} catch (Exception ex) {
System.out.println("Failed to connect to " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to connect to %s, %sErrMessage: %s%n",
jdbcUrl,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}

17
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WSParameterBindingBasicDemo.java → docs/examples/java/src/main/java/com/taos/example/WSParameterBindingBasicDemo.java
View File

@ -1,10 +1,8 @@
package com.taosdata.example;
package com.taos.example;
import com.taosdata.jdbc.TSDBPreparedStatement;
import com.taosdata.jdbc.ws.TSWSPreparedStatement;
import java.sql.*;
import java.util.ArrayList;
import java.util.Random;
// ANCHOR: para_bind
@ -47,12 +45,13 @@ public class WSParameterBindingBasicDemo {
System.out.println("Successfully inserted " + exeResult.length + " rows to power.meters.");
}
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert to table meters using stmt, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}

180
docs/examples/java/src/main/java/com/taos/example/WSParameterBindingFullDemo.java Normal file
View File

@ -0,0 +1,180 @@
package com.taos.example;
import com.taosdata.jdbc.ws.TSWSPreparedStatement;
import java.sql.*;
import java.util.Random;
// ANCHOR: para_bind
public class WSParameterBindingFullDemo {
private static final String host = "127.0.0.1";
private static final Random random = new Random(System.currentTimeMillis());
private static final int BINARY_COLUMN_SIZE = 30;
private static final String[] schemaList = {
"create table stable1(ts timestamp, f1 tinyint, f2 smallint, f3 int, f4 bigint) tags(t1 tinyint, t2 smallint, t3 int, t4 bigint)",
"create table stable2(ts timestamp, f1 float, f2 double) tags(t1 float, t2 double)",
"create table stable3(ts timestamp, f1 bool) tags(t1 bool)",
"create table stable4(ts timestamp, f1 binary(" + BINARY_COLUMN_SIZE + ")) tags(t1 binary(" + BINARY_COLUMN_SIZE + "))",
"create table stable5(ts timestamp, f1 nchar(" + BINARY_COLUMN_SIZE + ")) tags(t1 nchar(" + BINARY_COLUMN_SIZE + "))"
};
private static final int numOfSubTable = 10, numOfRow = 10;
public static void main(String[] args) throws SQLException {
String jdbcUrl = "jdbc:TAOS-RS://" + host + ":6041/?batchfetch=true";
try (Connection conn = DriverManager.getConnection(jdbcUrl, "root", "taosdata")) {
init(conn);
bindInteger(conn);
bindFloat(conn);
bindBoolean(conn);
bindBytes(conn);
bindString(conn);
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
throw ex;
}
}
private static void init(Connection conn) throws SQLException {
try (Statement stmt = conn.createStatement()) {
stmt.execute("drop database if exists test_ws_parabind");
stmt.execute("create database if not exists test_ws_parabind");
stmt.execute("use test_ws_parabind");
for (int i = 0; i < schemaList.length; i++) {
stmt.execute(schemaList[i]);
}
}
}
private static void bindInteger(Connection conn) throws SQLException {
String sql = "insert into ? using stable1 tags(?,?,?,?) values(?,?,?,?,?)";
try (TSWSPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSWSPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t1_" + i);
// set tags
pstmt.setTagByte(1, Byte.parseByte(Integer.toString(random.nextInt(Byte.MAX_VALUE))));
pstmt.setTagShort(2, Short.parseShort(Integer.toString(random.nextInt(Short.MAX_VALUE))));
pstmt.setTagInt(3, random.nextInt(Integer.MAX_VALUE));
pstmt.setTagLong(4, random.nextLong());
// set columns
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++) {
pstmt.setTimestamp(1, new Timestamp(current + j));
pstmt.setByte(2, Byte.parseByte(Integer.toString(random.nextInt(Byte.MAX_VALUE))));
pstmt.setShort(3, Short.parseShort(Integer.toString(random.nextInt(Short.MAX_VALUE))));
pstmt.setInt(4, random.nextInt(Integer.MAX_VALUE));
pstmt.setLong(5, random.nextLong());
pstmt.addBatch();
}
pstmt.executeBatch();
}
}
}
private static void bindFloat(Connection conn) throws SQLException {
String sql = "insert into ? using stable2 tags(?,?) values(?,?,?)";
try(TSWSPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSWSPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t2_" + i);
// set tags
pstmt.setTagFloat(1, random.nextFloat());
pstmt.setTagDouble(2, random.nextDouble());
// set columns
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++) {
pstmt.setTimestamp(1, new Timestamp(current + j));
pstmt.setFloat(2, random.nextFloat());
pstmt.setDouble(3, random.nextDouble());
pstmt.addBatch();
}
pstmt.executeBatch();
}
}
}
private static void bindBoolean(Connection conn) throws SQLException {
String sql = "insert into ? using stable3 tags(?) values(?,?)";
try (TSWSPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSWSPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t3_" + i);
// set tags
pstmt.setTagBoolean(1, random.nextBoolean());
// set columns
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++) {
pstmt.setTimestamp(1, new Timestamp(current + j));
pstmt.setBoolean(2, random.nextBoolean());
pstmt.addBatch();
}
pstmt.executeBatch();
}
}
}
private static void bindBytes(Connection conn) throws SQLException {
String sql = "insert into ? using stable4 tags(?) values(?,?)";
try (TSWSPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSWSPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t4_" + i);
// set tags
pstmt.setTagString(1, new String("abc"));
// set columns
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++) {
pstmt.setTimestamp(1, new Timestamp(current + j));
pstmt.setString(2, "abc");
pstmt.addBatch();
}
pstmt.executeBatch();
}
}
}
private static void bindString(Connection conn) throws SQLException {
String sql = "insert into ? using stable5 tags(?) values(?,?)";
try (TSWSPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSWSPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t5_" + i);
// set tags
pstmt.setTagNString(1, "California.SanFrancisco");
// set columns
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++) {
pstmt.setTimestamp(0, new Timestamp(current + j));
pstmt.setNString(1, "California.SanFrancisco");
pstmt.addBatch();
}
pstmt.executeBatch();
}
}
}
}
// ANCHOR_END: para_bind

143
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java → docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java
View File

@ -1,4 +1,4 @@
package com.taosdata.example;
package com.taos.example;
import com.alibaba.fastjson.JSON;
import com.taosdata.jdbc.TSDBDriver;
@ -6,19 +6,23 @@ import com.taosdata.jdbc.tmq.*;
import java.sql.*;
import java.time.Duration;
import java.util.*;
import java.util.Collections;
import java.util.List;
import java.util.Properties;
import java.util.Set;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.function.Consumer;
// ANCHOR: consumer_demo
public class WsConsumerLoopFull {
static private Connection connection;
static private Statement statement;
static private volatile boolean stopThread = false;
static private String groupId = "group1";
static private String clientId = "clinet1";
public static TaosConsumer<ResultBean> getConsumer() throws SQLException {
public static TaosConsumer<ResultBean> getConsumer() throws Exception {
// ANCHOR: create_consumer
Properties config = new Properties();
config.setProperty("td.connect.type", "ws");
@ -28,33 +32,38 @@ public class WsConsumerLoopFull {
config.setProperty("enable.auto.commit", "true");
config.setProperty("auto.commit.interval.ms", "1000");
config.setProperty("group.id", "group1");
config.setProperty("client.id", "1");
config.setProperty("client.id", "clinet1");
config.setProperty("td.connect.user", "root");
config.setProperty("td.connect.pass", "taosdata");
config.setProperty("value.deserializer", "com.taosdata.example.WsConsumerLoopFull$ResultDeserializer");
config.setProperty("value.deserializer", "com.taos.example.WsConsumerLoopFull$ResultDeserializer");
config.setProperty("value.deserializer.encoding", "UTF-8");
try {
TaosConsumer<ResultBean> consumer= new TaosConsumer<>(config);
System.out.println("Create consumer successfully, host: " + config.getProperty("bootstrap.servers") + ", groupId: " + config.getProperty("group.id") + ", clientId: " + config.getProperty("client.id"));
System.out.printf("Create consumer successfully, host: %s, groupId: %s, clientId: %s%n",
config.getProperty("bootstrap.servers"),
config.getProperty("group.id"),
config.getProperty("client.id"));
return consumer;
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to create websocket consumer, host: " + config.getProperty("bootstrap.servers") + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create consumer", ex);
} catch (Exception ex) {
System.out.println("Failed to create websocket consumer, host: " + config.getProperty("bootstrap.servers")
+ "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create consumer", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create websocket consumer, host: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
config.getProperty("bootstrap.servers"),
config.getProperty("group.id"),
config.getProperty("client.id"),
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: create_consumer
}
public static void pollExample(TaosConsumer<ResultBean> consumer) throws SQLException {
// ANCHOR: poll_data_code_piece
List<String> topics = Collections.singletonList("topic_meters");
try {
List<String> topics = Collections.singletonList("topic_meters");
// subscribe to the topics
consumer.subscribe(topics);
System.out.println("Subscribe topics successfully.");
@ -63,27 +72,29 @@ public class WsConsumerLoopFull {
ConsumerRecords<ResultBean> records = consumer.poll(Duration.ofMillis(100));
for (ConsumerRecord<ResultBean> record : records) {
ResultBean bean = record.value();
// process the data here
// Add your data processing logic here
System.out.println("data: " + JSON.toJSONString(bean));
}
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to poll data, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to poll data", ex);
} catch (Exception ex) {
System.out.println("Failed to poll data, ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to poll data", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to poll data, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
topics.get(0),
groupId,
clientId,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: poll_data_code_piece
}
public static void seekExample(TaosConsumer<ResultBean> consumer) throws SQLException {
// ANCHOR: consumer_seek
List<String> topics = Collections.singletonList("topic_meters");
try {
List<String> topics = Collections.singletonList("topic_meters");
// subscribe to the topics
consumer.subscribe(topics);
System.out.println("Subscribe topics successfully.");
@ -98,13 +109,17 @@ public class WsConsumerLoopFull {
consumer.seekToBeginning(assignment);
System.out.println("Assignment seek to beginning successfully.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Seek example failed; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("seek example failed", ex);
} catch (Exception ex) {
System.out.println("Seek example failed; ErrMessage: " + ex.getMessage());
throw new SQLException("seek example failed", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to seek offset, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
topics.get(0),
groupId,
clientId,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: consumer_seek
}
@ -112,15 +127,14 @@ public class WsConsumerLoopFull {
public static void commitExample(TaosConsumer<ResultBean> consumer) throws SQLException {
// ANCHOR: commit_code_piece
List<String> topics = Collections.singletonList("topic_meters");
try {
List<String> topics = Collections.singletonList("topic_meters");
consumer.subscribe(topics);
for (int i = 0; i < 50; i++) {
ConsumerRecords<ResultBean> records = consumer.poll(Duration.ofMillis(100));
for (ConsumerRecord<ResultBean> record : records) {
ResultBean bean = record.value();
// process your data here
// Add your data processing logic here
System.out.println("data: " + JSON.toJSONString(bean));
}
if (!records.isEmpty()) {
@ -129,13 +143,17 @@ public class WsConsumerLoopFull {
System.out.println("Commit offset manually successfully.");
}
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to execute consumer functions. ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to execute consumer functions", ex);
} catch (Exception ex) {
System.out.println("Failed to execute consumer functions. ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to execute consumer functions", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to commit offset, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
topics.get(0),
groupId,
clientId,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: commit_code_piece
}
@ -148,13 +166,17 @@ public class WsConsumerLoopFull {
// unsubscribe the consumer
consumer.unsubscribe();
System.out.println("Consumer unsubscribed successfully.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to unsubscribe consumer. ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to unsubscribe consumer", ex);
} catch (Exception ex) {
System.out.println("Failed to unsubscribe consumer. ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to unsubscribe consumer", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to unsubscribe consumer, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
topics.get(0),
groupId,
clientId,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
finally {
// close the consumer
@ -236,9 +258,14 @@ public class WsConsumerLoopFull {
i++;
Thread.sleep(1);
}
} catch (SQLException ex) {
System.out.println("Failed to insert data to power.meters, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to insert data to power.meters", ex);
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data to power.meters, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
@ -248,9 +275,14 @@ public class WsConsumerLoopFull {
statement.executeUpdate("USE power");
statement.executeUpdate("CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
statement.executeUpdate("CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM meters");
} catch (SQLException ex) {
System.out.println("Failed to create db and table, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create db and table", ex);
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create db and table, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
@ -309,7 +341,7 @@ public class WsConsumerLoopFull {
try {
prepareData();
} catch (SQLException ex) {
System.out.println("Failed to prepare data, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
System.out.println("Failed to prepare data, ErrCode:" + ex.getErrorCode() + ", ErrMessage: " + ex.getMessage());
return;
} catch (Exception ex) {
System.out.println("Failed to prepare data, ErrMessage: " + ex.getMessage());
@ -334,8 +366,7 @@ public class WsConsumerLoopFull {
consumer.unsubscribe();
unsubscribeExample(consumer);
System.out.println("unsubscribeExample executed successfully.");
System.out.println("unsubscribeExample executed successfully");
} catch (SQLException ex) {
System.out.println("Failed to poll data from topic_meters, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
return;

4
docs/examples/node/websocketexample/line_example.js
View File

@ -28,7 +28,7 @@ async function test() {
console.log("Inserted data with schemaless successfully.")
}
catch (err) {
console.error("Failed to insert data with schemaless, url:"+ dsn +", ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error(`Failed to insert data with schemaless, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
}
finally {
if (wsRows) {
@ -40,4 +40,4 @@ async function test() {
taos.destroy();
}
}
test()
test()

51
docs/examples/node/websocketexample/sql_example.js
View File

@ -9,11 +9,11 @@ async function createConnect() {
conf.setUser('root');
conf.setPwd('taosdata');
conf.setDb('power');
conn = await taos.sqlConnect(conf);
conn = await taos.sqlConnect(conf);
console.log("Connected to " + dsn + " successfully.");
return conn;
return conn;
} catch (err) {
console.log("Failed to connect to " + dns + "; ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.log("Failed to connect to " + dsn + ", ErrCode: " + err.code + ", ErrMessage: " + err.message);
throw err;
}
@ -29,13 +29,13 @@ async function createDbAndTable() {
await wsSql.exec('CREATE DATABASE IF NOT EXISTS power');
console.log("Create database power successfully.");
// create table
await wsSql.exec('CREATE STABLE IF NOT EXISTS power.meters ' +
'(_ts timestamp, current float, voltage int, phase float) ' +
'TAGS (location binary(64), groupId int);');
await wsSql.exec('CREATE STABLE IF NOT EXISTS power.meters ' +
'(_ts timestamp, current float, voltage int, phase float) ' +
'TAGS (location binary(64), groupId int);');
console.log("Create stable power.meters successfully");
} catch (err) {
console.error("Failed to create db and table, url:" + dns + "; ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error(`Failed to create database power or stable meters, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
} finally {
if (wsSql) {
await wsSql.close();
@ -51,18 +51,18 @@ async function insertData() {
try {
wsSql = await createConnect();
let insertQuery = "INSERT INTO " +
"power.d1001 USING power.meters (location, groupId) TAGS('California.SanFrancisco', 2) " +
"VALUES " +
"(NOW + 1a, 10.30000, 219, 0.31000) " +
"(NOW + 2a, 12.60000, 218, 0.33000) " +
"(NOW + 3a, 12.30000, 221, 0.31000) " +
"power.d1002 USING power.meters TAGS('California.SanFrancisco', 3) " +
"VALUES " +
"(NOW + 1a, 10.30000, 218, 0.25000) ";
"power.d1001 USING power.meters (location, groupId) TAGS('California.SanFrancisco', 2) " +
"VALUES " +
"(NOW + 1a, 10.30000, 219, 0.31000) " +
"(NOW + 2a, 12.60000, 218, 0.33000) " +
"(NOW + 3a, 12.30000, 221, 0.31000) " +
"power.d1002 USING power.meters TAGS('California.SanFrancisco', 3) " +
"VALUES " +
"(NOW + 1a, 10.30000, 218, 0.25000) ";
taosResult = await wsSql.exec(insertQuery);
console.log("Successfully inserted " + taosResult.getAffectRows() + " rows to power.meters.");
} catch (err) {
console.error("Failed to insert data to power.meters, url:" + dsn + "; ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error(`Failed to insert data to power.meters, sql: ${insertQuery}, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
} finally {
if (wsSql) {
await wsSql.close();
@ -75,21 +75,22 @@ async function insertData() {
async function queryData() {
let wsRows = null;
let wsSql = null;
let sql = 'SELECT ts, current, location FROM power.meters limit 100';
try {
wsSql = await createConnect();
wsRows = await wsSql.query('SELECT ts, current, location FROM power.meters limit 100');
wsRows = await wsSql.query(sql);
while (await wsRows.next()) {
let row = wsRows.getData();
console.log('ts: ' + row[0] + ', current: ' + row[1] + ', location: ' + row[2]);
console.log('ts: ' + row[0] + ', current: ' + row[1] + ', location: ' + row[2]);
}
}
catch (err) {
console.error("Failed to query data from power.meters, url:" + dsn + " ; ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error(`Failed to query data from power.meters, sql: ${sql}, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
}
finally {
if (wsRows) {
await wsRows.close();
}
}
if (wsSql) {
await wsSql.close();
}
@ -107,16 +108,16 @@ async function sqlWithReqid() {
wsRows = await wsSql.query('SELECT ts, current, location FROM power.meters limit 100', reqId);
while (await wsRows.next()) {
let row = wsRows.getData();
console.log('ts: ' + row[0] + ', current: ' + row[1] + ', location: ' + row[2]);
console.log('ts: ' + row[0] + ', current: ' + row[1] + ', location: ' + row[2]);
}
}
catch (err) {
console.error("Failed to execute sql with reqId: " + reqId + ", ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error(`Failed to query data from power.meters, reqId: ${reqId}, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
}
finally {
if (wsRows) {
await wsRows.close();
}
}
if (wsSql) {
await wsSql.close();
}
@ -129,7 +130,7 @@ async function test() {
await insertData();
await queryData();
await sqlWithReqid();
taos.destroy();
taos.destroy();
}
test()
test()

4
docs/examples/node/websocketexample/stmt_example.js
View File

@ -3,7 +3,7 @@ const taos = require("@tdengine/websocket");
let db = 'power';
let stable = 'meters';
let numOfSubTable = 10;
let numOfRow = 10;
let numOfRow = 10;
let dsn = 'ws://localhost:6041'
function getRandomInt(min, max) {
min = Math.ceil(min);
@ -59,7 +59,7 @@ async function prepare() {
}
}
catch (err) {
console.error("Failed to insert to table meters using stmt, url:" + dsn + "ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error(`Failed to insert to table meters using stmt, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
}
finally {
if (stmt) {

30
docs/examples/node/websocketexample/tmq_example.js
View File

@ -3,12 +3,16 @@ const taos = require("@tdengine/websocket");
// ANCHOR: create_consumer
const db = 'power';
const stable = 'meters';
const topics = ['power_meters_topic'];
const url = 'ws://localhost:6041';
const topic = 'topic_meters'
const topics = [topic];
const groupId = "group1";
const clientId = "client1";
async function createConsumer() {
let groupId = "group1";
let clientId = "1";
let clientId = "client1";
let configMap = new Map([
[taos.TMQConstants.GROUP_ID, groupId],
[taos.TMQConstants.CLIENT_ID, clientId],
@ -23,11 +27,11 @@ async function createConsumer() {
conn = await taos.tmqConnect(configMap);
console.log(`Create consumer successfully, host: ${url}, groupId: ${groupId}, clientId: ${clientId}`)
return conn;
}catch (err) {
console.log("Failed to create websocket consumer, ErrCode:" + err.code + "; ErrMessage: " + err.message);
} catch (err) {
console.error(`Failed to create websocket consumer, topic: ${topic}, groupId: ${groupId}, clientId: ${clientId}, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
throw err;
}
}
// ANCHOR_END: create_consumer
@ -38,7 +42,7 @@ async function prepare() {
conf.setDb('power');
const createDB = `CREATE DATABASE IF NOT EXISTS ${db}`;
const createStable = `CREATE STABLE IF NOT EXISTS ${db}.${stable} (ts timestamp, current float, voltage int, phase float) TAGS (location binary(64), groupId int);`;
let wsSql = await taos.sqlConnect(conf);
await wsSql.exec(createDB);
await wsSql.exec(createStable);
@ -60,13 +64,14 @@ async function subscribe(consumer) {
for (let i = 0; i < 50; i++) {
let res = await consumer.poll(100);
for (let [key, value] of res) {
// Add your data processing logic here
console.log(`data: ${key} ${value}`);
}
consumer.commit();
await consumer.commit();
console.log("Commit offset manually successfully.");
}
}
} catch (err) {
console.error("Failed to poll data; ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error(`Failed to poll data, topic: ${topic}, groupId: ${groupId}, clientId: ${clientId}, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
throw err;
}
// ANCHOR_END: commit
@ -77,17 +82,18 @@ async function test() {
let consumer = null;
try {
await prepare();
let consumer = await createConsumer()
await subscribe(consumer)
consumer = await createConsumer()
await subscribe(consumer)
await consumer.unsubscribe();
console.log("Consumer unsubscribed successfully.");
}
catch (err) {
console.error("Failed to unsubscribe consume, ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error(`Failed to unsubscribe consumer, topic: ${topic}, groupId: ${groupId}, clientId: ${clientId}, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
}
finally {
if (consumer) {
await consumer.close();
console.log("Consumer closed successfully.");
}
taos.destroy();
}

17
docs/examples/node/websocketexample/tmq_seek_example.js
View File

@ -2,7 +2,11 @@ const taos = require("@tdengine/websocket");
const db = 'power';
const stable = 'meters';
const topics = ['power_meters_topic'];
const topic = 'topic_meters'
const topics = [topic];
const groupId = "group1";
const clientId = "client1";
// ANCHOR: create_consumer
async function createConsumer() {
@ -19,7 +23,7 @@ async function createConsumer() {
try {
return await taos.tmqConnect(configMap);
} catch (err) {
console.log(err);
console.error(err);
throw err;
}
@ -31,7 +35,7 @@ async function prepare() {
conf.setUser('root');
conf.setPwd('taosdata');
conf.setDb('power');
const createDB = `CREATE DATABASE IF NOT EXISTS POWER ${db} KEEP 3650 DURATION 10 BUFFER 16 WAL_LEVEL 1;`;
const createDB = `CREATE DATABASE IF NOT EXISTS ${db} KEEP 3650 DURATION 10 BUFFER 16 WAL_LEVEL 1;`;
const createStable = `CREATE STABLE IF NOT EXISTS ${db}.${stable} (ts timestamp, current float, voltage int, phase float) TAGS (location binary(64), groupId int);`;
let wsSql = await taos.sqlConnect(conf);
@ -45,7 +49,7 @@ async function prepare() {
for (let i = 0; i < 10; i++) {
await wsSql.exec(`INSERT INTO d1001 USING ${stable} (location, groupId) TAGS ("California.SanFrancisco", 3) VALUES (NOW, ${10 + i}, ${200 + i}, ${0.32 + i})`);
}
wsSql.Close();
await wsSql.close();
}
// ANCHOR: subscribe
@ -55,11 +59,12 @@ async function subscribe(consumer) {
for (let i = 0; i < 50; i++) {
let res = await consumer.poll(100);
for (let [key, value] of res) {
// Add your data processing logic here
console.log(`data: ${key} ${value}`);
}
}
} catch (err) {
console.error("Failed to poll data; ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error(`Failed to poll data, topic: ${topic}, groupId: ${groupId}, clientId: ${clientId}, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
throw err;
}
@ -83,7 +88,7 @@ async function test() {
console.log("Assignment seek to beginning successfully");
}
catch (err) {
console.error("Seek example failed, ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error(`Failed to seek offset, topic: ${topic}, groupId: ${groupId}, clientId: ${clientId}, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
}
finally {
if (consumer) {

4
docs/examples/python/connect_example.py
View File

@ -14,11 +14,11 @@ def create_connection():
)
print(f"Connected to {host}:{port} successfully.");
except Exception as err:
print(f"Failed to connect to {host}:{port} ; ErrMessage:{err}")
print(f"Failed to connect to {host}:{port} , ErrMessage:{err}")
finally:
if conn:
conn.close()
if __name__ == "__main__":
create_connection()
create_connection()

2
docs/examples/python/connect_rest_example.py
View File

@ -12,7 +12,7 @@ def create_connection():
print(f"Connected to {url} successfully.");
except Exception as err:
print(f"Failed to connect to {url} ; ErrMessage:{err}")
print(f"Failed to connect to {url} , ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/connect_websocket_examples.py
View File

@ -14,7 +14,7 @@ def create_connection():
)
print(f"Connected to {host}:{port} successfully.");
except Exception as err:
print(f"Failed to connect to {host}:{port} ; ErrMessage:{err}")
print(f"Failed to connect to {host}:{port} , ErrMessage:{err}")
return conn
# ANCHOR_END: connect

2
docs/examples/python/create_db_native.py
View File

@ -20,7 +20,7 @@ try:
print(f"Create stable power.meters successfully, rowsAffected: {rowsAffected}");
except Exception as err:
print(f"Failed to create db and table, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to create database power or stable meters, ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/create_db_rest.py
View File

@ -19,7 +19,7 @@ try:
print(f"Create stable power.meters successfully, rowsAffected: {rowsAffected}");
except Exception as err:
print(f"Failed to create db and table, url:{url} ; ErrMessage:{err}")
print(f"Failed to create database power or stable meters, ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/create_db_ws.py
View File

@ -20,7 +20,7 @@ try:
print(f"Create stable power.meters successfully, rowsAffected: {rowsAffected}");
except Exception as err:
print(f"Failed to create db and table, db addrr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to create database power or stable meters, ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/insert_native.py
View File

@ -21,7 +21,7 @@ try:
print(f"Successfully inserted {affectedRows} rows to power.meters.")
except Exception as err:
print(f"Failed to insert data to power.meters, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to insert data to power.meters, sql: {sql}, ErrMessage: {err}.")
finally:
if conn:
conn.close()

2
docs/examples/python/insert_rest.py
View File

@ -20,7 +20,7 @@ try:
print(f"Successfully inserted {affectedRows} rows to power.meters.")
except Exception as err:
print(f"Failed to insert data to power.meters, url:{url} ; ErrMessage:{err}")
print(f"Failed to insert data to power.meters, sql:{sql}, ErrMessage:{err}.")
finally:
if conn:
conn.close()

2
docs/examples/python/insert_ws.py
View File

@ -21,7 +21,7 @@ try:
print(f"Successfully inserted {affectedRows} rows to power.meters.")
except Exception as err:
print(f"Failed to insert data to power.meters, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to insert data to power.meters, sql: {sql}, ErrMessage: {err}.")
finally:
if conn:
conn.close()

8
docs/examples/python/query_native.py
View File

@ -7,15 +7,15 @@ try:
port=port,
user="root",
password="taosdata")
result = conn.query("SELECT ts, current, location FROM power.meters limit 100")
sql = "SELECT ts, current, location FROM power.meters limit 100"
result = conn.query(sql)
# Get data from result as list of tuple
data = result.fetch_all()
for row in data:
print(f"ts: {row[0]}, current: {row[1]}, location: {row[2]}")
except Exception as err:
print(f"Failed to query data from power.meters, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to query data from power.meters, sql: {sql}, ErrMessage:{err}")
finally:
if conn:
conn.close()
conn.close()

6
docs/examples/python/query_rest.py
View File

@ -7,11 +7,11 @@ try:
user="root",
password="taosdata",
timeout=30)
result = client.sql(f"SELECT ts, current, location FROM power.meters limit 100")
sql = f"SELECT ts, current, location FROM power.meters limit 100"
result = client.sql(sql)
if result["data"]:
for row in result["data"]:
print(f"ts: {row[0]}, current: {row[1]}, location: {row[2]}")
except Exception as err:
print(f"Failed to query data from power.meters, url:{url} ; ErrMessage:{err}")
print(f"Failed to query data from power.meters, sql: {sql}, ErrMessage:{err}")

6
docs/examples/python/query_ws.py
View File

@ -8,13 +8,13 @@ try:
password="taosdata",
host=host,
port=port)
result = conn.query("SELECT ts, current, location FROM power.meters limit 100")
sql = "SELECT ts, current, location FROM power.meters limit 100"
result = conn.query(sql)
for row in result:
print(f"ts: {row[0]}, current: {row[1]}, location: {row[2]}")
except Exception as err:
print(f"Failed to query data from power.meters, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to query data from power.meters, sql: {sql}, ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/reqid_native.py
View File

@ -17,7 +17,7 @@ try:
print(f"ts: {row[0]}, current: {row[1]}, location: {row[2]}")
except Exception as err:
print(f"Failed to execute sql with reqId:{reqId}, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to execute sql with reqId:{reqId}, ErrMessage:{err}")
finally:
if conn:

2
docs/examples/python/reqid_rest.py
View File

@ -15,4 +15,4 @@ try:
print(f"ts: {row[0]}, current: {row[1]}, location: {row[2]}")
except Exception as err:
print(f"Failed to execute sql with reqId:{reqId}, url:{url} ; ErrMessage:{err}")
print(f"Failed to execute sql with reqId:{reqId}, ErrMessage:{err}")

2
docs/examples/python/reqid_ws.py
View File

@ -18,7 +18,7 @@ try:
print(f"ts: {row[0]}, current: {row[1]}, location: {row[2]}")
except Exception as err:
print(f"Failed to execute sql with reqId:{reqId}, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to execute sql with reqId:{reqId}, ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/schemaless_native.py
View File

@ -34,7 +34,7 @@ try:
)
print("Inserted data with schemaless successfully.");
except Exception as err:
print(f"Failed to insert data with schemaless, addr: {host}:{port} ErrMessage:{err}")
print(f"Failed to insert data with schemaless, ErrMessage:{err}")
finally:
if conn:
conn.close()

17
docs/examples/python/schemaless_ws.py
View File

@ -1,19 +1,21 @@
import taosws
host = "localhost"
port = 6041
def prepare():
conn = None
try:
conn = taosws.connect(user="root",
password="taosdata",
host="localhost",
port=6041)
host=host,
port=port)
# create database
rowsAffected = conn.execute(f"CREATE DATABASE IF NOT EXISTS power")
assert rowsAffected == 0
except Exception as err:
print(f"Failed to create db and table, err:{err}")
print(f"Failed to create db and table, db addrr:{host}:{port} ; ErrMessage:{err}")
raise err
finally:
if conn:
@ -32,8 +34,7 @@ def schemaless_insert():
jsonDemo = [
'{"metric": "metric_json","timestamp": 1626846400,"value": 10.3, "tags": {"groupid": 2, "location": "California.SanFrancisco", "id": "d1001"}}'
]
host = "localhost"
port = 6041
try:
conn = taosws.connect(user="root",
password="taosdata",
@ -66,7 +67,7 @@ def schemaless_insert():
)
print("Inserted data with schemaless successfully.");
except Exception as err:
print(f"Failed to insert data with schemaless, addr: {host}:{port} ErrMessage:{err}")
print(f"Failed to insert data with schemaless, ErrMessage:{err}")
raise err
finally:
@ -76,6 +77,6 @@ def schemaless_insert():
if __name__ == "__main__":
try:
prepare()
schemaless_insert
schemaless_insert()
except Exception as err:
print(f"Failed to insert data with schemaless, err:{err}")
print(f"Failed to insert data with schemaless, err:{err}")

6
docs/examples/python/stmt_native.py
View File

@ -7,8 +7,8 @@ numOfRow = 10
conn = None
stmt = None
host="localhost",
port=6030,
host="localhost"
port=6030
try:
conn = taos.connect(
user="root",
@ -56,7 +56,7 @@ try:
print(f"Successfully inserted to power.meters.")
except Exception as err:
print(f"Failed to insert to table meters using stmt, addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to insert to table meters using stmt, ErrMessage:{err}")
finally:
if stmt:
stmt.close()

6
docs/examples/python/stmt_ws.py
View File

@ -13,8 +13,8 @@ port=6041
try:
conn = taosws.connect(user="root",
password="taosdata",
host="localhost",
port=6041)
host=host,
port=port)
conn.execute("CREATE DATABASE IF NOT EXISTS power")
conn.execute("USE power")
@ -61,7 +61,7 @@ try:
print(f"Successfully inserted to power.meters.")
except Exception as err:
print(f"Failed to insert to table meters using stmt, addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to insert to table meters using stmt, ErrMessage:{err}")
finally:
if stmt:
stmt.close()

69
docs/examples/python/tmq_native.py
View File

@ -1,17 +1,24 @@
#!/usr/bin/python3
import taos
db = "power"
topic = "topic_meters"
user = "root"
password = "taosdata"
host = "localhost"
port = 6030
groupId = "group1"
clientId = "1"
tdConnWsScheme = "ws"
autoOffsetReset = "latest"
autoCommitState = "true"
autoCommitIntv = "1000"
def prepareMeta():
conn = None
try:
conn = taos.connect(
host="localhost",
user="root",
password="taosdata",
port=6030,
)
db = "power"
topic = "topic_meters"
conn = taos.connect(host=host, user=user, password=password, port=port)
conn.execute(f"CREATE DATABASE IF NOT EXISTS {db}")
# change database. same as execute "USE db"
@ -33,13 +40,13 @@ def prepareMeta():
power.d1001 USING power.meters (groupid, location) TAGS(2, 'California.SanFrancisco')
VALUES (NOW + 1a, 10.30000, 219, 0.31000)
(NOW + 2a, 12.60000, 218, 0.33000) (NOW + 3a, 12.30000, 221, 0.31000)
power.d1002 USING power.meters (groupid, location) TAGS(3, 'California.SanFrancisco')
power.d1002 USING power.meters (groupid, location) TAGS(3, 'California.SanFrancisco')
VALUES (NOW + 1a, 10.30000, 218, 0.25000)
"""
affectedRows = conn.execute(sql)
print(f"Inserted into {affectedRows} rows to power.meters successfully.")
except Exception as err:
print(f"Prepare insert data error, ErrMessage:{err}")
print(f"Failed to prepareMeta, host: {host}:{port}, db: {db}, topic: {topic}, ErrMessage:{err}.")
raise err
finally:
if conn:
@ -49,28 +56,24 @@ def prepareMeta():
from taos.tmq import Consumer
def create_consumer():
host = "localhost"
port = 6030
groupId = "group1"
clientId = "1"
try:
consumer = Consumer(
{
"group.id": groupId,
"client.id": clientId,
"td.connect.user": "root",
"td.connect.pass": "taosdata",
"enable.auto.commit": "true",
"auto.commit.interval.ms": "1000",
"auto.offset.reset": "latest",
"td.connect.user": user,
"td.connect.pass": password,
"enable.auto.commit": autoCommitState,
"auto.commit.interval.ms": autoCommitIntv,
"auto.offset.reset": autoOffsetReset,
"td.connect.ip": host,
"td.connect.port": port,
"td.connect.port": str(port),
}
)
print(f"Create consumer successfully, host: {host}:{port}, groupId: {groupId}, clientId: {clientId}");
print(f"Create consumer successfully, host: {host}:{port}, groupId: {groupId}, clientId: {clientId}")
return consumer
except Exception as err:
print(f"Failed to create native consumer, host: {host}:{port} ; ErrMessage:{err}");
print(f"Failed to create native consumer, host: {host}:{port}, groupId: {groupId}, clientId: {clientId}, ErrMessage:{err}.")
raise err
# ANCHOR_END: create_consumer
@ -96,7 +99,7 @@ def subscribe(consumer):
print(f"data: {data}")
except Exception as err:
print(f"Failed to poll data, ErrMessage:{err}")
print(f"Failed to poll data, topic: {topic}, groupId: {groupId}, clientId: {clientId}, ErrMessage:{err}.")
raise err
@ -123,7 +126,7 @@ def commit_offset(consumer):
print("Commit offset manually successfully.");
except Exception as err:
print(f"Failed to poll data, ErrMessage:{err}")
print(f"Failed to commit offset, topic: {topic}, groupId: {groupId}, clientId: {clientId}, ErrMessage:{err}.")
raise err
# ANCHOR_END: commit_offset
@ -136,9 +139,9 @@ def seek_offset(consumer):
for partition in assignments:
partition.offset = 0
consumer.seek(partition)
print(f"Assignment seek to beginning successfully");
print(f"Assignment seek to beginning successfully.")
except Exception as err:
print(f"Seek example failed; ErrMessage:{err}")
print(f"Failed to seek offset, topic: {topic}, groupId: {groupId}, clientId: {clientId}, ErrMessage:{err}.")
raise err
# ANCHOR_END: assignment
@ -148,10 +151,11 @@ def unsubscribe(consumer):
consumer.unsubscribe()
print("Consumer unsubscribed successfully.");
except Exception as err:
print(f"Failed to unsubscribe consumer. ErrMessage:{err}")
print(f"Failed to unsubscribe consumer. topic: {topic}, groupId: {groupId}, clientId: {clientId}, ErrMessage:{err}.")
finally:
if consumer:
consumer.close()
consumer.close()
print("Consumer closed successfully.");
# ANCHOR_END: unsubscribe
if __name__ == "__main__":
@ -162,10 +166,7 @@ if __name__ == "__main__":
subscribe(consumer)
seek_offset(consumer)
commit_offset(consumer)
consumer.unsubscribe()
print("Consumer unsubscribed successfully.");
except Exception as err:
print(f"Failed to stmt consumer. ErrMessage:{err}")
print(f"Failed to execute consumer example, topic: {topic}, groupId: {groupId}, clientId: {clientId}, ErrMessage:{err}.")
finally:
consumer.unsubscribe()
unsubscribe(consumer);

59
docs/examples/python/tmq_websocket_example.py
View File

@ -1,18 +1,26 @@
#!/usr/bin/python3
import taosws
topic = "topic_meters"
db = "power"
topic = "topic_meters"
user = "root"
password = "taosdata"
host = "localhost"
port = 6041
groupId = "group1"
clientId = "1"
tdConnWsScheme = "ws"
autoOffsetReset = "latest"
autoCommitState = "true"
autoCommitIntv = "1000"
def prepareMeta():
conn = None
try:
conn = taosws.connect(user="root",
password="taosdata",
host="localhost",
port=6041)
conn = taosws.connect(user=user, password=password, host=host, port=port)
db = "power"
# create database
rowsAffected = conn.execute(f"CREATE DATABASE IF NOT EXISTS {db}")
assert rowsAffected == 0
@ -51,7 +59,7 @@ def prepareMeta():
print(f"Inserted into {affectedRows} rows to power.meters successfully.")
except Exception as err:
print(f"Failed to prepareMeta ErrMessage:{err}")
print(f"Failed to prepareMeta, host: {host}:{port}, db: {db}, topic: {topic}, ErrMessage:{err}.")
raise err
finally:
if conn:
@ -59,26 +67,22 @@ def prepareMeta():
# ANCHOR: create_consumer
def create_consumer():
host = "localhost"
port = 6041
groupId = "group1"
clientId = "1"
def create_consumer():
try:
consumer = taosws.Consumer(conf={
"td.connect.websocket.scheme": "ws",
"td.connect.websocket.scheme": tdConnWsScheme,
"group.id": groupId,
"client.id": clientId,
"auto.offset.reset": "latest",
"auto.offset.reset": autoOffsetReset,
"td.connect.ip": host,
"td.connect.port": port,
"enable.auto.commit": "true",
"auto.commit.interval.ms": "1000",
"enable.auto.commit": autoCommitState,
"auto.commit.interval.ms": autoCommitIntv,
})
print(f"Create consumer successfully, host: {host}:{port}, groupId: {groupId}, clientId: {clientId}");
print(f"Create consumer successfully, host: {host}:{port}, groupId: {groupId}, clientId: {clientId}.");
return consumer;
except Exception as err:
print(f"Failed to create websocket consumer, host: {host}:{port} ; ErrMessage:{err}");
print(f"Failed to create websocket consumer, host: {host}:{port}, groupId: {groupId}, clientId: {clientId}, ErrMessage:{err}.");
raise err
@ -95,10 +99,10 @@ def seek_offset(consumer):
print(
f"vg_id: {assign.vg_id()}, offset: {assign.offset()}, begin: {assign.begin()}, end: {assign.end()}")
consumer.seek(topic, assign.vg_id(), assign.begin())
print("Assignment seek to beginning successfully");
print("Assignment seek to beginning successfully.")
except Exception as err:
print(f"Seek example failed; ErrMessage:{err}")
print(f"Failed to seek offset, topic: {topic}, groupId: {groupId}, clientId: {clientId}, ErrMessage:{err}.")
raise err
# ANCHOR_END: assignment
@ -116,7 +120,7 @@ def subscribe(consumer):
print(f"data: {row}")
except Exception as err:
print(f"Failed to poll data, ErrMessage:{err}")
print(f"Failed to poll data, topic: {topic}, groupId: {groupId}, clientId: {clientId}, ErrMessage:{err}.")
raise err
@ -134,10 +138,10 @@ def commit_offset(consumer):
# after processing the data, commit the offset manually
consumer.commit(records)
print("Commit offset manually successfully.");
print("Commit offset manually successfully.")
except Exception as err:
print(f"Failed to poll data, ErrMessage:{err}")
print(f"Failed to commit offset, topic: {topic}, groupId: {groupId}, clientId: {clientId}, ErrMessage:{err}.")
raise err
@ -150,10 +154,11 @@ def unsubscribe(consumer):
consumer.unsubscribe()
print("Consumer unsubscribed successfully.");
except Exception as err:
print(f"Failed to unsubscribe consumer. ErrMessage:{err}")
print(f"Failed to unsubscribe consumer. topic: {topic}, groupId: {groupId}, clientId: {clientId}, ErrMessage:{err}.")
finally:
if consumer:
consumer.close()
consumer.close()
print("Consumer closed successfully.");
# ANCHOR_END: unsubscribe
@ -166,6 +171,6 @@ if __name__ == "__main__":
seek_offset(consumer)
commit_offset(consumer)
except Exception as err:
print(f"Failed to stmt consumer. ErrorMessage:{err}")
print(f"Failed to execute consumer example, topic: {topic}, groupId: {groupId}, clientId: {clientId}, ErrMessage:{err}.")
finally:
unsubscribe(consumer);
unsubscribe(consumer)

2
docs/examples/rust/nativeexample/examples/connect.rs
View File

@ -10,7 +10,7 @@ async fn main() -> anyhow::Result<()> {
Ok(())
}
Err(err) => {
eprintln!("Failed to connect to {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to connect to {}, ErrMessage: {}", dsn, err);
return Err(err.into());
}
}

4
docs/examples/rust/nativeexample/examples/createdb.rs
View File

@ -13,7 +13,7 @@ async fn main() -> anyhow::Result<()> {
]).await {
Ok(afffected_rows) => println!("Create database power successfully, rowsAffected: {}", afffected_rows),
Err(err) => {
eprintln!("Failed to create database power; ErrMessage: {}", err);
eprintln!("Failed to create database power, ErrMessage: {}", err);
return Err(err.into());
}
}
@ -25,7 +25,7 @@ async fn main() -> anyhow::Result<()> {
]).await {
Ok(afffected_rows) => println!("Create stable power.meters successfully, rowsAffected: {}", afffected_rows),
Err(err) => {
eprintln!("Failed to create stable power.meters; ErrMessage: {}", err);
eprintln!("Failed to create stable power.meters, ErrMessage: {}", err);
return Err(err.into());
}
}

22
docs/examples/rust/nativeexample/examples/insert.rs
View File

@ -9,22 +9,22 @@ async fn main() -> anyhow::Result<()> {
// ANCHOR: insert_data
match taos.exec(r#"INSERT INTO
power.d1001 USING power.meters TAGS(2,'California.SanFrancisco')
VALUES
(NOW + 1a, 10.30000, 219, 0.31000)
(NOW + 2a, 12.60000, 218, 0.33000)
(NOW + 3a, 12.30000, 221, 0.31000)
power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco')
VALUES
(NOW + 1a, 10.30000, 218, 0.25000) "#).await{
let insert_sql = r#"INSERT INTO
power.d1001 USING power.meters TAGS(2,'California.SanFrancisco')
VALUES
(NOW + 1a, 10.30000, 219, 0.31000)
(NOW + 2a, 12.60000, 218, 0.33000)
(NOW + 3a, 12.30000, 221, 0.31000)
power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco')
VALUES
(NOW + 1a, 10.30000, 218, 0.25000) "#;
match taos.exec(insert_sql).await{
Ok(affected_rows) => println!("Successfully inserted {} rows to power.meters.", affected_rows),
Err(err) => {
eprintln!("Failed to insert data to power.meters, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to insert data to power.meters, sql: {}, ErrMessage: {}", insert_sql, err);
return Err(err.into());
}
}
// ANCHOR_END: insert_data
Ok(())

10
docs/examples/rust/nativeexample/examples/query.rs
View File

@ -11,7 +11,8 @@ async fn main() -> anyhow::Result<()> {
// ANCHOR: query_data
// query data, make sure the database and table are created before
match taos.query("SELECT ts, current, location FROM power.meters limit 100").await{
let sql = "SELECT ts, current, location FROM power.meters limit 100";
match taos.query(sql).await{
Ok(mut result) => {
for field in result.fields() {
println!("got field: {}", field.name());
@ -30,7 +31,7 @@ async fn main() -> anyhow::Result<()> {
}
}
Err(err) => {
eprintln!("Failed to query data from power.meters, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to query data from power.meters, sql: {}, ErrMessage: {}", sql, err);
return Err(err.into());
}
}
@ -51,6 +52,7 @@ async fn main() -> anyhow::Result<()> {
location: String,
}
let sql = "SELECT ts, current, location FROM power.meters limit 100";
match taos.query("SELECT ts, current, location FROM power.meters limit 100").await {
Ok(mut query) => {
match query.deserialize::<Record>().try_collect::<Vec<_>>().await {
@ -64,7 +66,7 @@ async fn main() -> anyhow::Result<()> {
}
}
Err(err) => {
eprintln!("Failed to query data from power.meters, url: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to query data from power.meters, sql: {}, ErrMessage: {}", sql, err);
return Err(err.into());
}
}
@ -92,7 +94,7 @@ async fn main() -> anyhow::Result<()> {
}
}
Err(err) => {
eprintln!("Failed to execute sql with reqId: {}, dsn: {}; ErrMessage: {}", req_id, dsn, err);
eprintln!("Failed to execute sql with reqId: {}, ErrMessage: {}", req_id, err);
return Err(err.into());
}
}

6
docs/examples/rust/nativeexample/examples/schemaless.rs
View File

@ -43,7 +43,7 @@ async fn main() -> anyhow::Result<()> {
match client.put(&sml_data).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to insert data with schemaless, host: {}; ErrMessage: {}", host, err);
eprintln!("Failed to insert data with schemaless, data:{:?}, ErrMessage: {}", data, err);
return Err(err.into());
}
}
@ -65,7 +65,7 @@ async fn main() -> anyhow::Result<()> {
match client.put(&sml_data).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to insert data with schemaless, host: {}; ErrMessage: {}", host, err);
eprintln!("Failed to insert data with schemaless, data:{:?}, ErrMessage: {}", data, err);
return Err(err.into());
}
}
@ -96,7 +96,7 @@ async fn main() -> anyhow::Result<()> {
match client.put(&sml_data).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to insert data with schemaless, host: {}; ErrMessage: {}", host, err);
eprintln!("Failed to insert data with schemaless, data:{:?}, ErrMessage: {}", data, err);
return Err(err.into());
}
}

26
docs/examples/rust/nativeexample/examples/stmt.rs
View File

@ -20,7 +20,13 @@ async fn main() -> anyhow::Result<()> {
let tags = vec![Value::Int(i as i32), Value::VarChar(format!("location_{}", i).into())];
// set table name and tags for the prepared statement.
stmt.set_tbname_tags(&table_name, &tags).await?;
match stmt.set_tbname_tags(&table_name, &tags).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to set table name and tags, table_name:{}, tags:{:?}, ErrMessage: {}", table_name, tags, err);
return Err(err.into());
}
}
for j in 0..NUM_ROWS {
let values = vec![
ColumnView::from_millis_timestamp(vec![1648432611249 + j as i64]),
@ -29,17 +35,29 @@ async fn main() -> anyhow::Result<()> {
ColumnView::from_floats(vec![0.31 + j as f32]),
];
// bind values to the prepared statement.
stmt.bind(&values).await?;
match stmt.bind(&values).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to bind values, values:{:?}, ErrMessage: {}", values, err);
return Err(err.into());
}
}
}
stmt.add_batch().await?;
match stmt.add_batch().await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to add batch, ErrMessage: {}", err);
return Err(err.into());
}
}
}
// execute.
match stmt.execute().await{
Ok(affected_rows) => println!("Successfully inserted {} rows to power.meters.", affected_rows),
Err(err) => {
eprintln!("Failed to insert to table meters using stmt, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to insert to table meters using stmt, ErrMessage: {}", err);
return Err(err.into());
}
}

68
docs/examples/rust/nativeexample/examples/tmq.rs
View File

@ -3,6 +3,8 @@ use std::str::FromStr;
use chrono::Local;
use chrono::DateTime;
use taos::*;
use std::thread;
use tokio::runtime::Runtime;
#[tokio::main]
async fn main() -> anyhow::Result<()> {
@ -53,17 +55,38 @@ async fn main() -> anyhow::Result<()> {
consumer
}
Err(err) => {
eprintln!("Failed to create consumer, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to create native consumer, dsn: {}, groupId: {}, clientId: {}, ErrMessage: {:?}", dsn, group_id, client_id, err);
return Err(err.into());
}
};
// ANCHOR_END: create_consumer_ac
thread::spawn(move || {
let rt = Runtime::new().unwrap();
rt.block_on(async {
let taos_insert = TaosBuilder::from_dsn(&dsn).unwrap().build().await.unwrap();
for i in 0..50 {
let insert_sql = format!(r#"INSERT INTO
power.d1001 USING power.meters TAGS(2,'California.SanFrancisco')
VALUES
(NOW, 10.30000, {}, 0.31000)"#, i);
if let Err(e) = taos_insert.exec(insert_sql).await {
eprintln!("Failed to execute insert: {:?}", e);
}
tokio::time::sleep(Duration::from_millis(10)).await;
}
});
}).join().unwrap();
// ANCHOR: consume
match consumer.subscribe(["topic_meters"]).await{
let topic = "topic_meters";
match consumer.subscribe([topic]).await{
Ok(_) => println!("Subscribe topics successfully."),
Err(err) => {
eprintln!("Failed to subscribe topic_meters, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to subscribe topic: {}, groupId: {}, clientId: {}, ErrMessage: {:?}", topic, group_id, client_id, err);
return Err(err.into());
}
}
@ -94,13 +117,14 @@ async fn main() -> anyhow::Result<()> {
if let Some(data) = message.into_data() {
while let Some(block) = data.fetch_raw_block().await? {
let records: Vec<Record> = block.deserialize().try_collect()?;
// Add your data processing logic here
println!("** read {} records: {:#?}\n", records.len(), records);
}
}
Ok(())
})
.await.map_err(|e| {
eprintln!("Failed to execute consumer functions. ErrMessage: {:?}", e);
eprintln!("Failed to poll data, topic: {}, groupId: {}, clientId: {}, ErrMessage: {:?}", topic, group_id, client_id, e);
e
})?;
@ -110,14 +134,14 @@ async fn main() -> anyhow::Result<()> {
consumer
.stream()
.try_for_each(|(offset, message)| async {
let topic = offset.topic();
// the vgroup id, like partition id in kafka.
let vgroup_id = offset.vgroup_id();
println!("* in vgroup id {vgroup_id} of topic {topic}\n");
println!("* in vgroup id {} of topic {}\n", vgroup_id, topic);
if let Some(data) = message.into_data() {
while let Some(block) = data.fetch_raw_block().await? {
let records: Vec<Record> = block.deserialize().try_collect()?;
// Add your data processing logic here
println!("** read {} records: {:#?}\n", records.len(), records);
}
}
@ -125,22 +149,30 @@ async fn main() -> anyhow::Result<()> {
match consumer.commit(offset).await{
Ok(_) => println!("Commit offset manually successfully."),
Err(err) => {
eprintln!("Failed to commit offset manually, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to commit offset manually, topic: {}, groupId: {}, clientId: {}, vGroupId: {}, ErrMessage: {:?}",
topic, group_id, client_id, vgroup_id, err);
return Err(err.into());
}
}
Ok(())
})
.await.map_err(|e| {
eprintln!("Failed to execute consumer functions. ErrMessage: {:?}", e);
eprintln!("Failed to poll data, topic: {}, groupId: {}, clientId: {}, ErrMessage: {:?}", topic, group_id, client_id, e);
e
})?;
// ANCHOR_END: consumer_commit_manually
// ANCHOR: seek_offset
let assignments = consumer.assignments().await.unwrap();
println!("Now assignments: {:?}", assignments);
let assignments = match consumer.assignments().await{
Some(assignments) => assignments,
None => {
let error_message = format!("Failed to get assignments. topic: {}, groupId: {}, clientId: {}", topic, group_id, client_id);
eprintln!("{}", error_message);
return Err(anyhow::anyhow!(error_message));
}
};
println!("assignments: {:?}", assignments);
// seek offset
for topic_vec_assignment in assignments {
@ -152,7 +184,7 @@ async fn main() -> anyhow::Result<()> {
let begin = assignment.begin();
let end = assignment.end();
println!(
"topic: {}, vgroup_id: {}, current offset: {} begin {}, end: {}",
"topic: {}, vgroup_id: {}, current offset: {}, begin {}, end: {}",
topic,
vgroup_id,
current,
@ -163,18 +195,26 @@ async fn main() -> anyhow::Result<()> {
match consumer.offset_seek(topic, vgroup_id, begin).await{
Ok(_) => (),
Err(err) => {
eprintln!("Seek example failed; ErrMessage: {}", err);
eprintln!("Failed to seek offset, topic: {}, groupId: {}, clientId: {}, vGroupId: {}, begin: {}, ErrMessage: {:?}",
topic, group_id, client_id, vgroup_id, begin, err);
return Err(err.into());
}
}
}
let topic_assignment = consumer.topic_assignment(topic).await;
println!("Topic assignment: {:?}", topic_assignment);
println!("topic assignment: {:?}", topic_assignment);
}
println!("Assignment seek to beginning successfully.");
// after seek offset
let assignments = consumer.assignments().await.unwrap();
let assignments = match consumer.assignments().await{
Some(assignments) => assignments,
None => {
let error_message = format!("Failed to get assignments. topic: {}, groupId: {}, clientId: {}", topic, group_id, client_id);
eprintln!("{}", error_message);
return Err(anyhow::anyhow!(error_message));
}
};
println!("After seek offset assignments: {:?}", assignments);
// ANCHOR_END: seek_offset

2
docs/examples/rust/restexample/examples/connect.rs
View File

@ -10,7 +10,7 @@ async fn main() -> anyhow::Result<()> {
Ok(())
}
Err(err) => {
eprintln!("Failed to connect to {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to connect to {}, ErrMessage: {}", dsn, err);
return Err(err.into());
}
}

4
docs/examples/rust/restexample/examples/createdb.rs
View File

@ -13,7 +13,7 @@ async fn main() -> anyhow::Result<()> {
]).await {
Ok(afffected_rows) => println!("Create database power successfully, rowsAffected: {}", afffected_rows),
Err(err) => {
eprintln!("Failed to create database power; ErrMessage: {}", err);
eprintln!("Failed to create database power, ErrMessage: {}", err);
return Err(err.into());
}
}
@ -25,7 +25,7 @@ async fn main() -> anyhow::Result<()> {
]).await {
Ok(afffected_rows) => println!("Create stable power.meters successfully, rowsAffected: {}", afffected_rows),
Err(err) => {
eprintln!("Failed to create stable power.meters; ErrMessage: {}", err);
eprintln!("Failed to create stable power.meters, ErrMessage: {}", err);
return Err(err.into());
}
}

22
docs/examples/rust/restexample/examples/insert.rs
View File

@ -9,22 +9,22 @@ async fn main() -> anyhow::Result<()> {
// ANCHOR: insert_data
match taos.exec(r#"INSERT INTO
power.d1001 USING power.meters TAGS(2,'California.SanFrancisco')
VALUES
(NOW + 1a, 10.30000, 219, 0.31000)
(NOW + 2a, 12.60000, 218, 0.33000)
(NOW + 3a, 12.30000, 221, 0.31000)
power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco')
VALUES
(NOW + 1a, 10.30000, 218, 0.25000) "#).await{
let insert_sql = r#"INSERT INTO
power.d1001 USING power.meters TAGS(2,'California.SanFrancisco')
VALUES
(NOW + 1a, 10.30000, 219, 0.31000)
(NOW + 2a, 12.60000, 218, 0.33000)
(NOW + 3a, 12.30000, 221, 0.31000)
power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco')
VALUES
(NOW + 1a, 10.30000, 218, 0.25000) "#;
match taos.exec(insert_sql).await{
Ok(affected_rows) => println!("Successfully inserted {} rows to power.meters.", affected_rows),
Err(err) => {
eprintln!("Failed to insert data to power.meters, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to insert data to power.meters, sql: {}, ErrMessage: {}", insert_sql, err);
return Err(err.into());
}
}
// ANCHOR_END: insert_data
Ok(())

10
docs/examples/rust/restexample/examples/query.rs
View File

@ -11,7 +11,8 @@ async fn main() -> anyhow::Result<()> {
// ANCHOR: query_data
// query data, make sure the database and table are created before
match taos.query("SELECT ts, current, location FROM power.meters limit 100").await{
let sql = "SELECT ts, current, location FROM power.meters limit 100";
match taos.query(sql).await{
Ok(mut result) => {
for field in result.fields() {
println!("got field: {}", field.name());
@ -30,7 +31,7 @@ async fn main() -> anyhow::Result<()> {
}
}
Err(err) => {
eprintln!("Failed to query data from power.meters, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to query data from power.meters, sql: {}, ErrMessage: {}", sql, err);
return Err(err.into());
}
}
@ -51,6 +52,7 @@ async fn main() -> anyhow::Result<()> {
location: String,
}
let sql = "SELECT ts, current, location FROM power.meters limit 100";
match taos.query("SELECT ts, current, location FROM power.meters limit 100").await {
Ok(mut query) => {
match query.deserialize::<Record>().try_collect::<Vec<_>>().await {
@ -64,7 +66,7 @@ async fn main() -> anyhow::Result<()> {
}
}
Err(err) => {
eprintln!("Failed to query data from power.meters, url: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to query data from power.meters, sql: {}, ErrMessage: {}", sql, err);
return Err(err.into());
}
}
@ -92,7 +94,7 @@ async fn main() -> anyhow::Result<()> {
}
}
Err(err) => {
eprintln!("Failed to execute sql with reqId: {}, dsn: {}; ErrMessage: {}", req_id, dsn, err);
eprintln!("Failed to execute sql with reqId: {}, ErrMessage: {}", req_id, err);
return Err(err.into());
}
}

15
docs/examples/rust/restexample/examples/schemaless.rs
View File

@ -17,6 +17,15 @@ async fn main() -> anyhow::Result<()> {
let client = TaosBuilder::from_dsn(dsn)?.build().await?;
let db = "power";
client
.exec(format!("create database if not exists {db}"))
.await?;
// should specify database before insert
client.exec(format!("use {db}")).await?;
// SchemalessProtocol::Line
let data = [
"meters,groupid=2,location=California.SanFrancisco current=10.3000002f64,voltage=219i32,phase=0.31f64 1626006833639",
@ -34,7 +43,7 @@ async fn main() -> anyhow::Result<()> {
match client.put(&sml_data).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to insert data with schemaless, host: {}; ErrMessage: {}", host, err);
eprintln!("Failed to insert data with schemaless, data:{:?}, ErrMessage: {}", data, err);
return Err(err.into());
}
}
@ -56,7 +65,7 @@ async fn main() -> anyhow::Result<()> {
match client.put(&sml_data).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to insert data with schemaless, host: {}; ErrMessage: {}", host, err);
eprintln!("Failed to insert data with schemaless, data:{:?}, ErrMessage: {}", data, err);
return Err(err.into());
}
}
@ -87,7 +96,7 @@ async fn main() -> anyhow::Result<()> {
match client.put(&sml_data).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to insert data with schemaless, host: {}; ErrMessage: {}", host, err);
eprintln!("Failed to insert data with schemaless, data:{:?}, ErrMessage: {}", data, err);
return Err(err.into());
}
}

26
docs/examples/rust/restexample/examples/stmt.rs
View File

@ -20,7 +20,13 @@ async fn main() -> anyhow::Result<()> {
let tags = vec![Value::Int(i as i32), Value::VarChar(format!("location_{}", i).into())];
// set table name and tags for the prepared statement.
stmt.set_tbname_tags(&table_name, &tags).await?;
match stmt.set_tbname_tags(&table_name, &tags).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to set table name and tags, table_name:{}, tags:{:?}, ErrMessage: {}", table_name, tags, err);
return Err(err.into());
}
}
for j in 0..NUM_ROWS {
let values = vec![
ColumnView::from_millis_timestamp(vec![1648432611249 + j as i64]),
@ -29,17 +35,29 @@ async fn main() -> anyhow::Result<()> {
ColumnView::from_floats(vec![0.31 + j as f32]),
];
// bind values to the prepared statement.
stmt.bind(&values).await?;
match stmt.bind(&values).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to bind values, values:{:?}, ErrMessage: {}", values, err);
return Err(err.into());
}
}
}
stmt.add_batch().await?;
match stmt.add_batch().await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to add batch, ErrMessage: {}", err);
return Err(err.into());
}
}
}
// execute.
match stmt.execute().await{
Ok(affected_rows) => println!("Successfully inserted {} rows to power.meters.", affected_rows),
Err(err) => {
eprintln!("Failed to insert to table meters using stmt, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to insert to table meters using stmt, ErrMessage: {}", err);
return Err(err.into());
}
}

64
docs/examples/rust/restexample/examples/tmq.rs
View File

@ -3,6 +3,8 @@ use std::str::FromStr;
use chrono::Local;
use chrono::DateTime;
use taos::*;
use std::thread;
use tokio::runtime::Runtime;
#[tokio::main]
async fn main() -> anyhow::Result<()> {
@ -53,17 +55,38 @@ async fn main() -> anyhow::Result<()> {
consumer
}
Err(err) => {
eprintln!("Failed to create consumer, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to create websocket consumer, dsn: {}, groupId: {}, clientId: {}, ErrMessage: {:?}", dsn, group_id, client_id, err);
return Err(err.into());
}
};
// ANCHOR_END: create_consumer_ac
thread::spawn(move || {
let rt = Runtime::new().unwrap();
rt.block_on(async {
let taos_insert = TaosBuilder::from_dsn(&dsn).unwrap().build().await.unwrap();
for i in 0..50 {
let insert_sql = format!(r#"INSERT INTO
power.d1001 USING power.meters TAGS(2,'California.SanFrancisco')
VALUES
(NOW, 10.30000, {}, 0.31000)"#, i);
if let Err(e) = taos_insert.exec(insert_sql).await {
eprintln!("Failed to execute insert: {:?}", e);
}
tokio::time::sleep(Duration::from_millis(10)).await;
}
});
}).join().unwrap();
// ANCHOR: consume
match consumer.subscribe(["topic_meters"]).await{
let topic = "topic_meters";
match consumer.subscribe([topic]).await{
Ok(_) => println!("Subscribe topics successfully."),
Err(err) => {
eprintln!("Failed to subscribe topic_meters, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to subscribe topic: {}, groupId: {}, clientId: {}, ErrMessage: {:?}", topic, group_id, client_id, err);
return Err(err.into());
}
}
@ -94,13 +117,14 @@ async fn main() -> anyhow::Result<()> {
if let Some(data) = message.into_data() {
while let Some(block) = data.fetch_raw_block().await? {
let records: Vec<Record> = block.deserialize().try_collect()?;
// Add your data processing logic here
println!("** read {} records: {:#?}\n", records.len(), records);
}
}
Ok(())
})
.await.map_err(|e| {
eprintln!("Failed to poll data; ErrMessage: {:?}", e);
eprintln!("Failed to poll data, topic: {}, groupId: {}, clientId: {}, ErrMessage: {:?}", topic, group_id, client_id, e);
e
})?;
@ -110,14 +134,14 @@ async fn main() -> anyhow::Result<()> {
consumer
.stream()
.try_for_each(|(offset, message)| async {
let topic = offset.topic();
// the vgroup id, like partition id in kafka.
let vgroup_id = offset.vgroup_id();
println!("* in vgroup id {vgroup_id} of topic {topic}\n");
println!("* in vgroup id {} of topic {}\n", vgroup_id, topic);
if let Some(data) = message.into_data() {
while let Some(block) = data.fetch_raw_block().await? {
let records: Vec<Record> = block.deserialize().try_collect()?;
// Add your data processing logic here
println!("** read {} records: {:#?}\n", records.len(), records);
}
}
@ -125,21 +149,29 @@ async fn main() -> anyhow::Result<()> {
match consumer.commit(offset).await{
Ok(_) => println!("Commit offset manually successfully."),
Err(err) => {
eprintln!("Failed to commit offset manually, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to commit offset manually, topic: {}, groupId: {}, clientId: {}, vGroupId: {}, ErrMessage: {:?}",
topic, group_id, client_id, vgroup_id, err);
return Err(err.into());
}
}
Ok(())
})
.await.map_err(|e| {
eprintln!("Failed to execute consumer functions. ErrMessage: {:?}", e);
eprintln!("Failed to poll data, topic: {}, groupId: {}, clientId: {}, ErrMessage: {:?}", topic, group_id, client_id, e);
e
})?;
// ANCHOR_END: consumer_commit_manually
// ANCHOR: seek_offset
let assignments = consumer.assignments().await.unwrap();
let assignments = match consumer.assignments().await{
Some(assignments) => assignments,
None => {
let error_message = format!("Failed to get assignments. topic: {}, groupId: {}, clientId: {}", topic, group_id, client_id);
eprintln!("{}", error_message);
return Err(anyhow::anyhow!(error_message));
}
};
println!("assignments: {:?}", assignments);
// seek offset
@ -152,7 +184,7 @@ async fn main() -> anyhow::Result<()> {
let begin = assignment.begin();
let end = assignment.end();
println!(
"topic: {}, vgroup_id: {}, current offset: {} begin {}, end: {}",
"topic: {}, vgroup_id: {}, current offset: {}, begin {}, end: {}",
topic,
vgroup_id,
current,
@ -163,7 +195,8 @@ async fn main() -> anyhow::Result<()> {
match consumer.offset_seek(topic, vgroup_id, begin).await{
Ok(_) => (),
Err(err) => {
eprintln!("seek example failed; ErrMessage: {}", err);
eprintln!("Failed to seek offset, topic: {}, groupId: {}, clientId: {}, vGroupId: {}, begin: {}, ErrMessage: {:?}",
topic, group_id, client_id, vgroup_id, begin, err);
return Err(err.into());
}
}
@ -174,7 +207,14 @@ async fn main() -> anyhow::Result<()> {
}
println!("Assignment seek to beginning successfully.");
// after seek offset
let assignments = consumer.assignments().await.unwrap();
let assignments = match consumer.assignments().await{
Some(assignments) => assignments,
None => {
let error_message = format!("Failed to get assignments. topic: {}, groupId: {}, clientId: {}", topic, group_id, client_id);
eprintln!("{}", error_message);
return Err(anyhow::anyhow!(error_message));
}
};
println!("After seek offset assignments: {:?}", assignments);
// ANCHOR_END: seek_offset

7
docs/zh/08-develop/01-connect/index.md
View File

@ -399,7 +399,8 @@ C/C++ 语言连接器使用 `taos_connect()` 函数用于建立与 TDengine 数
</TabItem>
<TabItem label="REST API" value="rest">
使用 REST API 方式访问 TDengine，由应用程序去建立 HTTP 连接，自己控制 HTTP 连接参数。
通过 REST API 方式访问 TDengine 时，应用程序直接与 taosAdapter 建立 HTTP 连接，建议使用连接池来管理连接。
使用 REST API 的参数具体可以参考：[http-请求格式](../../reference/connector/rest-api/#http-请求格式)
</TabItem>
</Tabs>
@ -544,7 +545,7 @@ C/C++ 语言连接器使用 `taos_connect()` 函数用于建立与 TDengine 数
使用示例如下：
```java
{{#include examples/JDBC/connectionPools/src/main/java/com/taosdata/example/HikariDemo.java:connection_pool}}
{{#include docs/examples/java/src/main/java/com/taos/example/HikariDemo.java:connection_pool}}
```
> 通过 HikariDataSource.getConnection() 获取连接后，使用完成后需要调用 close() 方法，实际上它并不会关闭连接，只是放回连接池中。
@ -555,7 +556,7 @@ C/C++ 语言连接器使用 `taos_connect()` 函数用于建立与 TDengine 数
使用示例如下：
```java
{{#include examples/JDBC/connectionPools/src/main/java/com/taosdata/example/DruidDemo.java:connection_pool}}
{{#include docs/examples/java/src/main/java/com/taos/example/DruidDemo.java:connection_pool}}
```
> 更多 druid 使用问题请查看[官方说明](https://github.com/alibaba/druid)。

8
docs/zh/08-develop/02-sql.md
View File

@ -27,7 +27,7 @@ REST API：直接调用 `taosadapter` 提供的 REST API 接口，进行数据
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcCreatDBDemo.java:create_db_and_table}}
{{#include docs/examples/java/src/main/java/com/taos/example/JdbcCreatDBDemo.java:create_db_and_table}}
```
</TabItem>
@ -98,7 +98,7 @@ curl --location -uroot:taosdata 'http://127.0.0.1:6041/rest/sql/power' \
<Tabs defaultValue="java" groupId="lang">
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcInsertDataDemo.java:insert_data}}
{{#include docs/examples/java/src/main/java/com/taos/example/JdbcInsertDataDemo.java:insert_data}}
```
**Note**
@ -170,7 +170,7 @@ curl --location -uroot:taosdata 'http://127.0.0.1:6041/rest/sql' \
<TabItem label="Java" value="java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcQueryDemo.java:query_data}}
{{#include docs/examples/java/src/main/java/com/taos/example/JdbcQueryDemo.java:query_data}}
```
**Note** 查询和操作关系型数据库一致，使用下标获取返回字段内容时从 1 开始，建议使用字段名称获取。
@ -251,7 +251,7 @@ reqId 可用于请求链路追踪，reqId 就像分布式系统中的 traceId
<TabItem label="Java" value="java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcReqIdDemo.java:with_reqid}}
{{#include docs/examples/java/src/main/java/com/taos/example/JdbcReqIdDemo.java:with_reqid}}
```
</TabItem>

4
docs/zh/08-develop/04-schemaless.md
View File

@ -165,7 +165,7 @@ st,t1=3,t2=4,t3=t3 c1=3i64,c6="passit" 1626006833640000000
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/SchemalessWsTest.java:schemaless}}
{{#include docs/examples/java/src/main/java/com/taos/example/SchemalessWsTest.java:schemaless}}
```
@ -216,7 +216,7 @@ writer.write(lineDemo, SchemalessProtocolType.LINE, SchemalessTimestampType.NANO
<Tabs defaultValue="java" groupId="lang">
<TabItem label="Java" value="java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/SchemalessJniTest.java:schemaless}}
{{#include docs/examples/java/src/main/java/com/taos/example/SchemalessJniTest.java:schemaless}}
```
执行带有 reqId 的无模式写入，最后一个参数 reqId 可用于请求链路追踪。

8
docs/zh/08-develop/05-stmt.md
View File

@ -27,11 +27,11 @@ import TabItem from "@theme/TabItem";
<Tabs defaultValue="java" groupId="lang">
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WSParameterBindingBasicDemo.java:para_bind}}
{{#include docs/examples/java/src/main/java/com/taos/example/WSParameterBindingBasicDemo.java:para_bind}}
```
这是一个[更详细的参数绑定示例](https://github.com/taosdata/TDengine/blob/main/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WSParameterBindingFullDemo.java)
这是一个[更详细的参数绑定示例](https://github.com/taosdata/TDengine/blob/main/docs/examples/java/src/main/java/com/taos/example/WSParameterBindingFullDemo.java)
</TabItem>
<TabItem label="Python" value="python">
@ -76,10 +76,10 @@ import TabItem from "@theme/TabItem";
<TabItem label="Java" value="java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/ParameterBindingBasicDemo.java:para_bind}}
{{#include docs/examples/java/src/main/java/com/taos/example/ParameterBindingBasicDemo.java:para_bind}}
```
这是一个[更详细的参数绑定示例](https://github.com/taosdata/TDengine/blob/main/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/ParameterBindingFullDemo.java)
这是一个[更详细的参数绑定示例](https://github.com/taosdata/TDengine/blob/main/docs/examples/java/src/main/java/com/taos/example/ParameterBindingFullDemo.java)
</TabItem>
<TabItem label="Python" value="python">

28
docs/zh/08-develop/07-tmq.md
View File

@ -109,7 +109,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:create_consumer}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:create_consumer}}
```
</TabItem>
@ -168,7 +168,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/ConsumerLoopFull.java:create_consumer}}
{{#include docs/examples/java/src/main/java/com/taos/example/ConsumerLoopFull.java:create_consumer}}
```
</TabItem>
@ -229,7 +229,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:poll_data_code_piece}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:poll_data_code_piece}}
```
- `subscribe` 方法的参数含义为：订阅的主题列表（即名称），支持同时订阅多个主题。
@ -293,7 +293,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:poll_data_code_piece}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:poll_data_code_piece}}
```
- `subscribe` 方法的参数含义为：订阅的主题列表（即名称），支持同时订阅多个主题。
@ -376,7 +376,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:consumer_seek}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:consumer_seek}}
```
1. 使用 consumer.poll 方法轮询数据，直到获取到数据为止。
2. 对于轮询到的第一批数据，打印第一条数据的内容，并获取当前消费者的分区分配信息。
@ -438,7 +438,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:consumer_seek}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:consumer_seek}}
```
1. 使用 consumer.poll 方法轮询数据，直到获取到数据为止。
2. 对于轮询到的第一批数据，打印第一条数据的内容，并获取当前消费者的分区分配信息。
@ -513,7 +513,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:commit_code_piece}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:commit_code_piece}}
```
</TabItem>
@ -565,7 +565,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:commit_code_piece}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:commit_code_piece}}
```
</TabItem>
@ -621,7 +621,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:unsubscribe_data_code_piece}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:unsubscribe_data_code_piece}}
```
</TabItem>
@ -644,7 +644,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
{{#include docs/examples/rust/restexample/examples/tmq.rs:unsubscribe}}
```
**注意**：消费者取消订阅后无法重用，如果想订阅新的 `topic`， 请重新创建消费者。
**注意**：消费者取消订阅后已经关闭，无法重用，如果想订阅新的 `topic`， 请重新创建消费者。
</TabItem>
<TabItem label="Node.js" value="node">
@ -672,7 +672,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:unsubscribe_data_code_piece}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:unsubscribe_data_code_piece}}
```
</TabItem>
@ -694,7 +694,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
{{#include docs/examples/rust/restexample/examples/tmq.rs:unsubscribe}}
```
**注意**：消费者取消订阅后无法重用，如果想订阅新的 `topic`， 请重新创建消费者。
**注意**：消费者取消订阅后已经关闭，无法重用，如果想订阅新的 `topic`， 请重新创建消费者。
</TabItem>
<TabItem label="Node.js" value="node">
不支持
@ -723,7 +723,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<details>
<summary>完整代码示例</summary>
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:consumer_demo}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:consumer_demo}}
```
**注意**：这里的 value.deserializer 配置参数值应该根据测试环境的包路径做相应的调整。
@ -788,7 +788,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<details>
<summary>完整代码示例</summary>
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/ConsumerLoopFull.java:consumer_demo}}
{{#include docs/examples/java/src/main/java/com/taos/example/ConsumerLoopFull.java:consumer_demo}}
```
**注意**：这里的 value.deserializer 配置参数值应该根据测试环境的包路径做相应的调整。

4
docs/zh/14-reference/05-connector/14-java.mdx
View File

@ -60,7 +60,7 @@ REST 连接支持所有能运行 Java 的平台。
在报错后，通过 SQLException 可以获取到错误的信息和错误码：
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcBasicDemo.java:jdbc_exception}}
{{#include docs/examples/java/src/main/java/com/taos/example/JdbcBasicDemo.java:jdbc_exception}}
```
JDBC 连接器可能报错的错误码包括 4 种：
@ -141,7 +141,7 @@ TDengine 目前支持时间戳、数字、字符、布尔类型，与 Java 对
由于历史原因，TDengine中的BINARY底层不是真正的二进制数据，已不建议使用。请用VARBINARY类型代替。
GEOMETRY类型是little endian字节序的二进制数据，符合WKB规范。详细信息请参考 [数据类型](../../taos-sql/data-type/#数据类型)
WKB规范请参考[Well-Known Binary (WKB)](https://libgeos.org/specifications/wkb/)
对于java连接器，可以使用jts库来方便的创建GEOMETRY类型对象，序列化后写入TDengine，这里有一个样例[Geometry示例](https://github.com/taosdata/TDengine/blob/3.0/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/GeometryDemo.java)
对于java连接器，可以使用jts库来方便的创建GEOMETRY类型对象，序列化后写入TDengine，这里有一个样例[Geometry示例](https://github.com/taosdata/TDengine/blob/main/docs/examples/java/src/main/java/com/taos/example/GeometryDemo.java)
## 示例程序汇总

53
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcInsertDataDemo.java
View File

@ -1,53 +0,0 @@
package com.taosdata.example;
import com.taosdata.jdbc.AbstractStatement;
import java.sql.*;
import java.util.Properties;
public class JdbcInsertDataDemo {
private static final String host = "localhost";
private static final String dbName = "test";
private static final String tbName = "weather";
private static final String user = "root";
private static final String password = "taosdata";
public static void main(String[] args) throws SQLException {
final String jdbcUrl = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
// get connection
Properties properties = new Properties();
properties.setProperty("charset", "UTF-8");
properties.setProperty("locale", "en_US.UTF-8");
properties.setProperty("timezone", "UTC-8");
System.out.println("get connection starting...");
// ANCHOR: insert_data
try (Connection connection = DriverManager.getConnection(jdbcUrl, properties);
Statement stmt = connection.createStatement()) {
// insert data, please make sure the database and table are created before
String insertQuery = "INSERT INTO " +
"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 219, 0.31000) " +
"(NOW + 2a, 12.60000, 218, 0.33000) " +
"(NOW + 3a, 12.30000, 221, 0.31000) " +
"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 218, 0.25000) ";
int affectedRows = stmt.executeUpdate(insertQuery);
// you can check affectedRows here
System.out.println("Successfully inserted " + affectedRows + " rows to power.meters.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert data to power.meters, url:" + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert data to power.meters, url:" + jdbcUrl + "; ErrMessage: " + ex.getMessage());
throw ex;
}
// ANCHOR_END: insert_data
}
}

48
examples/JDBC/connectionPools/src/main/java/com/taosdata/example/DruidDemo.java
View File

@ -2,35 +2,35 @@ package com.taosdata.example;
import com.alibaba.druid.pool.DruidDataSource;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.Statement;
public class DruidDemo {
// ANCHOR: connection_pool
public static void main(String[] args) throws Exception {
String url = "jdbc:TAOS://127.0.0.1:6030/log";
// ANCHOR: connection_pool
public static void main(String[] args) throws Exception {
String url = "jdbc:TAOS://127.0.0.1:6030/log";
DruidDataSource dataSource = new DruidDataSource();
// jdbc properties
dataSource.setDriverClassName("com.taosdata.jdbc.TSDBDriver");
dataSource.setUrl(url);
dataSource.setUsername("root");
dataSource.setPassword("taosdata");
// pool configurations
dataSource.setInitialSize(10);
dataSource.setMinIdle(10);
dataSource.setMaxActive(10);
dataSource.setMaxWait(30000);
dataSource.setValidationQuery("SELECT SERVER_VERSION()");
DruidDataSource dataSource = new DruidDataSource();
// jdbc properties
dataSource.setDriverClassName("com.taosdata.jdbc.TSDBDriver");
dataSource.setUrl(url);
dataSource.setUsername("root");
dataSource.setPassword("taosdata");
// pool configurations
dataSource.setInitialSize(10);
dataSource.setMinIdle(10);
dataSource.setMaxActive(10);
dataSource.setMaxWait(30000);
dataSource.setValidationQuery("SELECT SERVER_VERSION()");
Connection connection = dataSource.getConnection(); // get connection
Statement statement = connection.createStatement(); // get statement
//query or insert
// ...
Connection connection = dataSource.getConnection(); // get connection
Statement statement = connection.createStatement(); // get statement
// query or insert
// ...
statement.close();
connection.close(); // put back to connection pool
}
// ANCHOR_END: connection_pool
statement.close();
connection.close(); // put back to connection pool
dataSource.close();
}
// ANCHOR_END: connection_pool
}

48
examples/JDBC/connectionPools/src/main/java/com/taosdata/example/HikariDemo.java
View File

@ -4,34 +4,34 @@ import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
public class HikariDemo {
// ANCHOR: connection_pool
public static void main(String[] args) throws SQLException {
HikariConfig config = new HikariConfig();
// jdbc properties
config.setJdbcUrl("jdbc:TAOS://127.0.0.1:6030/log");
config.setUsername("root");
config.setPassword("taosdata");
// connection pool configurations
config.setMinimumIdle(10); //minimum number of idle connection
config.setMaximumPoolSize(10); //maximum number of connection in the pool
config.setConnectionTimeout(30000); //maximum wait milliseconds for get connection from pool
config.setMaxLifetime(0); // maximum life time for each connection
config.setIdleTimeout(0); // max idle time for recycle idle connection
config.setConnectionTestQuery("SELECT SERVER_VERSION()"); //validation query
// ANCHOR: connection_pool
public static void main(String[] args) throws Exception {
HikariConfig config = new HikariConfig();
// jdbc properties
config.setJdbcUrl("jdbc:TAOS://127.0.0.1:6030/log");
config.setUsername("root");
config.setPassword("taosdata");
// connection pool configurations
config.setMinimumIdle(10); // minimum number of idle connection
config.setMaximumPoolSize(10); // maximum number of connection in the pool
config.setConnectionTimeout(30000); // maximum wait milliseconds for get connection from pool
config.setMaxLifetime(0); // maximum life time for each connection
config.setIdleTimeout(0); // max idle time for recycle idle connection
config.setConnectionTestQuery("SELECT SERVER_VERSION()"); // validation query
HikariDataSource ds = new HikariDataSource(config); //create datasource
HikariDataSource dataSource = new HikariDataSource(config); // create datasource
Connection connection = ds.getConnection(); // get connection
Statement statement = connection.createStatement(); // get statement
Connection connection = dataSource.getConnection(); // get connection
Statement statement = connection.createStatement(); // get statement
//query or insert
// ...
statement.close();
connection.close(); // put back to connection pool
}
// ANCHOR_END: connection_pool
// query or insert
// ...
statement.close();
connection.close(); // put back to connection pool
dataSource.close();
}
// ANCHOR_END: connection_pool
}