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homework-jianmu/tests/script/api/apitest.c

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// sample code to verify all TDengine API
// to compile: gcc -o apitest apitest.c -ltaos
#include "cJSON.h"
#include "taoserror.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "../../include/client/taos.h"
static int64_t count = 10000;
int64_t genReqid() {
count += 100;
return count;
}
static void prepare_data(TAOS* taos) {
TAOS_RES* result;
result = taos_query(taos, "drop database if exists test;");
taos_free_result(result);
usleep(100000);
result = taos_query(taos, "create database test precision 'us';");
taos_free_result(result);
usleep(100000);
taos_select_db(taos, "test");
result = taos_query(taos, "create table meters(ts timestamp, a int) tags(area int);");
taos_free_result(result);
result = taos_query(taos, "create table t0 using meters tags(0);");
taos_free_result(result);
result = taos_query(taos, "create table t1 using meters tags(1);");
taos_free_result(result);
result = taos_query(taos, "create table t2 using meters tags(2);");
taos_free_result(result);
result = taos_query(taos, "create table t3 using meters tags(3);");
taos_free_result(result);
result = taos_query(taos, "create table t4 using meters tags(4);");
taos_free_result(result);
result = taos_query(taos, "create table t5 using meters tags(5);");
taos_free_result(result);
result = taos_query(taos, "create table t6 using meters tags(6);");
taos_free_result(result);
result = taos_query(taos, "create table t7 using meters tags(7);");
taos_free_result(result);
result = taos_query(taos, "create table t8 using meters tags(8);");
taos_free_result(result);
result = taos_query(taos, "create table t9 using meters tags(9);");
taos_free_result(result);
result = taos_query(taos,
"insert into t0 values('2020-01-01 00:00:00.000', 0)"
" ('2020-01-01 00:01:00.000', 0)"
" ('2020-01-01 00:02:00.000', 0)"
" t1 values('2020-01-01 00:00:00.000', 0)"
" ('2020-01-01 00:01:00.000', 0)"
" ('2020-01-01 00:02:00.000', 0)"
" ('2020-01-01 00:03:00.000', 0)"
" t2 values('2020-01-01 00:00:00.000', 0)"
" ('2020-01-01 00:01:00.000', 0)"
" ('2020-01-01 00:01:01.000', 0)"
" ('2020-01-01 00:01:02.000', 0)"
" t3 values('2020-01-01 00:01:02.000', 0)"
" t4 values('2020-01-01 00:01:02.000', 0)"
" t5 values('2020-01-01 00:01:02.000', 0)"
" t6 values('2020-01-01 00:01:02.000', 0)"
" t7 values('2020-01-01 00:01:02.000', 0)"
" t8 values('2020-01-01 00:01:02.000', 0)"
" t9 values('2020-01-01 00:01:02.000', 0)");
int affected = taos_affected_rows(result);
if (affected != 18) {
printf("\033[31m%d rows affected by last insert statement, but it should be 18\033[0m\n", affected);
}
taos_free_result(result);
// super tables subscription
usleep(1000000);
}
static int print_result(TAOS_RES* res, int blockFetch) {
TAOS_ROW row = NULL;
int num_fields = taos_num_fields(res);
TAOS_FIELD* fields = taos_fetch_fields(res);
int nRows = 0;
if (blockFetch) {
int rows = 0;
while ((rows = taos_fetch_block(res, &row))) {
// for (int i = 0; i < rows; i++) {
// char temp[256];
// taos_print_row(temp, row + i, fields, num_fields);
// puts(temp);
// }
nRows += rows;
}
} else {
while ((row = taos_fetch_row(res))) {
char temp[256] = {0};
taos_print_row(temp, row, fields, num_fields);
puts(temp);
nRows++;
}
}
printf("%d rows consumed.\n", nRows);
return nRows;
}
static void check_row_count(int line, TAOS_RES* res, int expected) {
int actual = print_result(res, expected % 2);
if (actual != expected) {
printf("\033[31mline %d: row count mismatch, expected: %d, actual: %d\033[0m\n", line, expected, actual);
} else {
printf("line %d: %d rows consumed as expected\n", line, actual);
}
}
static void verify_query(TAOS* taos) {
prepare_data(taos);
int code = taos_load_table_info(taos, "t0,t1,t2,t3,t4,t5,t6,t7,t8,t9");
if (code != 0) {
printf("\033[31mfailed to load table info: 0x%08x\033[0m\n", code);
}
code = taos_validate_sql(taos, "select * from nonexisttable");
if (code == 0) {
printf("\033[31mimpossible, the table does not exists\033[0m\n");
}
code = taos_validate_sql(taos, "select * from meters");
if (code != 0) {
printf("\033[31mimpossible, the table does exists: 0x%08x\033[0m\n", code);
}
TAOS_RES* res = taos_query_with_reqid(taos, "select * from meters", genReqid());
check_row_count(__LINE__, res, 18);
printf("result precision is: %d\n", taos_result_precision(res));
int c = taos_field_count(res);
printf("field count is: %d\n", c);
int* lengths = taos_fetch_lengths(res);
for (int i = 0; i < c; i++) {
printf("length of column %d is %d\n", i, lengths[i]);
}
taos_free_result(res);
res = taos_query_with_reqid(taos, "select * from t0", genReqid());
check_row_count(__LINE__, res, 3);
taos_free_result(res);
res = taos_query_with_reqid(taos, "select * from nonexisttable", genReqid());
code = taos_errno(res);
printf("code=%d, error msg=%s\n", code, taos_errstr(res));
taos_free_result(res);
res = taos_query_with_reqid(taos, "select * from meters", genReqid());
taos_stop_query(res);
taos_free_result(res);
}
void subscribe_callback(TAOS_SUB* tsub, TAOS_RES* res, void* param, int code) {
int rows = print_result(res, *(int*)param);
printf("%d rows consumed in subscribe_callback\n", rows);
}
void verify_prepare(TAOS* taos) {
TAOS_RES* result = taos_query(taos, "drop database if exists test;");
taos_free_result(result);
usleep(100000);
result = taos_query(taos, "create database test;");
int code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create database, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
return;
}
taos_free_result(result);
usleep(100000);
taos_select_db(taos, "test");
// create table
const char* sql =
"create table m1 (ts timestamp, b bool, v1 tinyint, v2 smallint, v4 int, v8 bigint, f4 float, f8 double, bin "
"binary(40), blob nchar(10))";
result = taos_query_with_reqid(taos, sql, genReqid());
code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create table, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
return;
}
taos_free_result(result);
// insert 10 records
struct {
int64_t ts;
int8_t b;
int8_t v1;
int16_t v2;
int32_t v4;
int64_t v8;
float f4;
double f8;
char bin[40];
char blob[80];
} v = {0};
int32_t boolLen = sizeof(int8_t);
int32_t sintLen = sizeof(int16_t);
int32_t intLen = sizeof(int32_t);
int32_t bintLen = sizeof(int64_t);
int32_t floatLen = sizeof(float);
int32_t doubleLen = sizeof(double);
int32_t binLen = sizeof(v.bin);
int32_t ncharLen = 30;
TAOS_STMT* stmt = taos_stmt_init(taos);
TAOS_MULTI_BIND params[10];
params[0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
params[0].buffer_length = sizeof(v.ts);
params[0].buffer = &v.ts;
params[0].length = &bintLen;
params[0].is_null = NULL;
params[0].num = 1;
params[1].buffer_type = TSDB_DATA_TYPE_BOOL;
params[1].buffer_length = sizeof(v.b);
params[1].buffer = &v.b;
params[1].length = &boolLen;
params[1].is_null = NULL;
params[1].num = 1;
params[2].buffer_type = TSDB_DATA_TYPE_TINYINT;
params[2].buffer_length = sizeof(v.v1);
params[2].buffer = &v.v1;
params[2].length = &boolLen;
params[2].is_null = NULL;
params[2].num = 1;
params[3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
params[3].buffer_length = sizeof(v.v2);
params[3].buffer = &v.v2;
params[3].length = &sintLen;
params[3].is_null = NULL;
params[3].num = 1;
params[4].buffer_type = TSDB_DATA_TYPE_INT;
params[4].buffer_length = sizeof(v.v4);
params[4].buffer = &v.v4;
params[4].length = &intLen;
params[4].is_null = NULL;
params[4].num = 1;
params[5].buffer_type = TSDB_DATA_TYPE_BIGINT;
params[5].buffer_length = sizeof(v.v8);
params[5].buffer = &v.v8;
params[5].length = &bintLen;
params[5].is_null = NULL;
params[5].num = 1;
params[6].buffer_type = TSDB_DATA_TYPE_FLOAT;
params[6].buffer_length = sizeof(v.f4);
params[6].buffer = &v.f4;
params[6].length = &floatLen;
params[6].is_null = NULL;
params[6].num = 1;
params[7].buffer_type = TSDB_DATA_TYPE_DOUBLE;
params[7].buffer_length = sizeof(v.f8);
params[7].buffer = &v.f8;
params[7].length = &doubleLen;
params[7].is_null = NULL;
params[7].num = 1;
params[8].buffer_type = TSDB_DATA_TYPE_BINARY;
params[8].buffer_length = sizeof(v.bin);
params[8].buffer = v.bin;
params[8].length = &binLen;
params[8].is_null = NULL;
params[8].num = 1;
strcpy(v.blob, "一二三四五六七八九十");
params[9].buffer_type = TSDB_DATA_TYPE_NCHAR;
params[9].buffer_length = sizeof(v.blob);
params[9].buffer = v.blob;
params[9].length = &ncharLen;
params[9].is_null = NULL;
params[9].num = 1;
char is_null = 1;
sql = "insert into m1 values(?,?,?,?,?,?,?,?,?,?)";
code = taos_stmt_prepare(stmt, sql, 0);
if (code != 0) {
printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
return;
}
v.ts = 1591060628000;
for (int i = 0; i < 10; ++i) {
v.ts += 1;
for (int j = 1; j < 10; ++j) {
params[j].is_null = ((i == j) ? &is_null : 0);
}
v.b = (int8_t)i % 2;
v.v1 = (int8_t)i;
v.v2 = (int16_t)(i * 2);
v.v4 = (int32_t)(i * 4);
v.v8 = (int64_t)(i * 8);
v.f4 = (float)(i * 40);
v.f8 = (double)(i * 80);
for (int j = 0; j < sizeof(v.bin); ++j) {
v.bin[j] = (char)(i + '0');
}
taos_stmt_bind_param(stmt, params);
taos_stmt_add_batch(stmt);
}
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute insert statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
return;
}
taos_stmt_close(stmt);
// query the records
stmt = taos_stmt_init(taos);
taos_stmt_prepare(stmt, "SELECT * FROM m1 WHERE v1 > ? AND v2 < ?", 0);
v.v1 = 5;
v.v2 = 15;
taos_stmt_bind_param(stmt, params + 2);
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute select statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
return;
}
result = taos_stmt_use_result(stmt);
TAOS_ROW row;
int rows = 0;
int num_fields = taos_num_fields(result);
TAOS_FIELD* fields = taos_fetch_fields(result);
// fetch the records row by row
while ((row = taos_fetch_row(result))) {
char temp[256] = {0};
rows++;
taos_print_row(temp, row, fields, num_fields);
printf("%s\n", temp);
}
taos_free_result(result);
taos_stmt_close(stmt);
}
void verify_prepare2(TAOS* taos) {
TAOS_RES* result = taos_query(taos, "drop database if exists test;");
taos_free_result(result);
usleep(100000);
result = taos_query(taos, "create database test;");
int code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create database, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
return;
}
taos_free_result(result);
usleep(100000);
taos_select_db(taos, "test");
// create table
const char* sql =
"create table m1 (ts timestamp, b bool, v1 tinyint, v2 smallint, v4 int, v8 bigint, f4 float, f8 double, bin "
"binary(40), blob nchar(10))";
result = taos_query(taos, sql);
code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create table, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
return;
}
taos_free_result(result);
// insert 10 records
struct {
int64_t ts[10];
int8_t b[10];
int8_t v1[10];
int16_t v2[10];
int32_t v4[10];
int64_t v8[10];
float f4[10];
double f8[10];
char bin[10][40];
char blob[10][80];
} v;
int32_t* t8_len = malloc(sizeof(int32_t) * 10);
int32_t* t16_len = malloc(sizeof(int32_t) * 10);
int32_t* t32_len = malloc(sizeof(int32_t) * 10);
int32_t* t64_len = malloc(sizeof(int32_t) * 10);
int32_t* float_len = malloc(sizeof(int32_t) * 10);
int32_t* double_len = malloc(sizeof(int32_t) * 10);
int32_t* bin_len = malloc(sizeof(int32_t) * 10);
int32_t* blob_len = malloc(sizeof(int32_t) * 10);
TAOS_STMT* stmt = taos_stmt_init(taos);
TAOS_MULTI_BIND params[10];
char is_null[10] = {0};
params[0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
params[0].buffer_length = sizeof(v.ts[0]);
params[0].buffer = v.ts;
params[0].length = t64_len;
params[0].is_null = is_null;
params[0].num = 10;
params[1].buffer_type = TSDB_DATA_TYPE_BOOL;
params[1].buffer_length = sizeof(v.b[0]);
params[1].buffer = v.b;
params[1].length = t8_len;
params[1].is_null = is_null;
params[1].num = 10;
params[2].buffer_type = TSDB_DATA_TYPE_TINYINT;
params[2].buffer_length = sizeof(v.v1[0]);
params[2].buffer = v.v1;
params[2].length = t8_len;
params[2].is_null = is_null;
params[2].num = 10;
params[3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
params[3].buffer_length = sizeof(v.v2[0]);
params[3].buffer = v.v2;
params[3].length = t16_len;
params[3].is_null = is_null;
params[3].num = 10;
params[4].buffer_type = TSDB_DATA_TYPE_INT;
params[4].buffer_length = sizeof(v.v4[0]);
params[4].buffer = v.v4;
params[4].length = t32_len;
params[4].is_null = is_null;
params[4].num = 10;
params[5].buffer_type = TSDB_DATA_TYPE_BIGINT;
params[5].buffer_length = sizeof(v.v8[0]);
params[5].buffer = v.v8;
params[5].length = t64_len;
params[5].is_null = is_null;
params[5].num = 10;
params[6].buffer_type = TSDB_DATA_TYPE_FLOAT;
params[6].buffer_length = sizeof(v.f4[0]);
params[6].buffer = v.f4;
params[6].length = float_len;
params[6].is_null = is_null;
params[6].num = 10;
params[7].buffer_type = TSDB_DATA_TYPE_DOUBLE;
params[7].buffer_length = sizeof(v.f8[0]);
params[7].buffer = v.f8;
params[7].length = double_len;
params[7].is_null = is_null;
params[7].num = 10;
params[8].buffer_type = TSDB_DATA_TYPE_BINARY;
params[8].buffer_length = sizeof(v.bin[0]);
params[8].buffer = v.bin;
params[8].length = bin_len;
params[8].is_null = is_null;
params[8].num = 10;
params[9].buffer_type = TSDB_DATA_TYPE_NCHAR;
params[9].buffer_length = sizeof(v.blob[0]);
params[9].buffer = v.blob;
params[9].length = blob_len;
params[9].is_null = is_null;
params[9].num = 10;
sql = "insert into ? (ts, b, v1, v2, v4, v8, f4, f8, bin, blob) values(?,?,?,?,?,?,?,?,?,?)";
code = taos_stmt_prepare(stmt, sql, 0);
if (code != 0) {
printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
return;
}
code = taos_stmt_set_tbname(stmt, "m1");
if (code != 0) {
printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
return;
}
int64_t ts = 1591060628000;
for (int i = 0; i < 10; ++i) {
v.ts[i] = ts++;
is_null[i] = 0;
v.b[i] = (int8_t)i % 2;
v.v1[i] = (int8_t)i;
v.v2[i] = (int16_t)(i * 2);
v.v4[i] = (int32_t)(i * 4);
v.v8[i] = (int64_t)(i * 8);
v.f4[i] = (float)(i * 40);
v.f8[i] = (double)(i * 80);
for (int j = 0; j < sizeof(v.bin[0]); ++j) {
v.bin[i][j] = (char)(i + '0');
}
strcpy(v.blob[i], "一二三四五六七八九十");
t8_len[i] = sizeof(int8_t);
t16_len[i] = sizeof(int16_t);
t32_len[i] = sizeof(int32_t);
t64_len[i] = sizeof(int64_t);
float_len[i] = sizeof(float);
double_len[i] = sizeof(double);
bin_len[i] = sizeof(v.bin[0]);
blob_len[i] = (int32_t)strlen(v.blob[i]);
}
taos_stmt_bind_param_batch(stmt, params);
taos_stmt_add_batch(stmt);
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute insert statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
return;
}
taos_stmt_close(stmt);
// query the records
stmt = taos_stmt_init(taos);
taos_stmt_prepare(stmt, "SELECT * FROM m1 WHERE v1 > ? AND v2 < ?", 0);
TAOS_MULTI_BIND qparams[2];
int8_t v1 = 5;
int16_t v2 = 15;
int32_t tinyLen = sizeof(v1);
int32_t smallLen = sizeof(v2);
qparams[0].buffer_type = TSDB_DATA_TYPE_TINYINT;
qparams[0].buffer_length = sizeof(v1);
qparams[0].buffer = &v1;
qparams[0].length = &tinyLen;
qparams[0].is_null = NULL;
qparams[0].num = 1;
qparams[1].buffer_type = TSDB_DATA_TYPE_SMALLINT;
qparams[1].buffer_length = sizeof(v2);
qparams[1].buffer = &v2;
qparams[1].length = &smallLen;
qparams[1].is_null = NULL;
qparams[1].num = 1;
taos_stmt_bind_param(stmt, qparams);
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute select statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
return;
}
result = taos_stmt_use_result(stmt);
TAOS_ROW row;
int rows = 0;
int num_fields = taos_num_fields(result);
TAOS_FIELD* fields = taos_fetch_fields(result);
// fetch the records row by row
while ((row = taos_fetch_row(result))) {
char temp[256] = {0};
rows++;
taos_print_row(temp, row, fields, num_fields);
printf("%s\n", temp);
}
taos_free_result(result);
taos_stmt_close(stmt);
free(t8_len);
free(t16_len);
free(t32_len);
free(t64_len);
free(float_len);
free(double_len);
free(bin_len);
free(blob_len);
}
void verify_prepare3(TAOS* taos) {
TAOS_RES* result = taos_query(taos, "drop database if exists test;");
taos_free_result(result);
usleep(100000);
result = taos_query(taos, "create database test;");
int code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create database, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
return;
}
taos_free_result(result);
usleep(100000);
taos_select_db(taos, "test");
// create table
const char* sql =
"create stable st1 (ts timestamp, b bool, v1 tinyint, v2 smallint, v4 int, v8 bigint, f4 float, f8 double, bin "
"binary(40), blob nchar(10)) tags (id1 int, id2 binary(40))";
result = taos_query(taos, sql);
code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create table, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
return;
}
taos_free_result(result);
TAOS_MULTI_BIND tags[2];
int32_t id1 = 1;
char id2[40] = "abcdefghijklmnopqrstuvwxyz0123456789";
int32_t id2_len = (int32_t)strlen(id2);
tags[0].buffer_type = TSDB_DATA_TYPE_INT;
tags[0].buffer_length = sizeof(int);
tags[0].buffer = &id1;
tags[0].length = NULL;
tags[0].is_null = NULL;
tags[0].num = 1;
tags[1].buffer_type = TSDB_DATA_TYPE_BINARY;
tags[1].buffer_length = sizeof(id2);
tags[1].buffer = id2;
tags[1].length = &id2_len;
tags[1].is_null = NULL;
tags[1].num = 1;
// insert 10 records
struct {
int64_t ts[10];
int8_t b[10];
int8_t v1[10];
int16_t v2[10];
int32_t v4[10];
int64_t v8[10];
float f4[10];
double f8[10];
char bin[10][40];
char blob[10][80];
} v;
int32_t* t8_len = malloc(sizeof(int32_t) * 10);
int32_t* t16_len = malloc(sizeof(int32_t) * 10);
int32_t* t32_len = malloc(sizeof(int32_t) * 10);
int32_t* t64_len = malloc(sizeof(int32_t) * 10);
int32_t* float_len = malloc(sizeof(int32_t) * 10);
int32_t* double_len = malloc(sizeof(int32_t) * 10);
int32_t* bin_len = malloc(sizeof(int32_t) * 10);
int32_t* blob_len = malloc(sizeof(int32_t) * 10);
TAOS_STMT* stmt = taos_stmt_init(taos);
TAOS_MULTI_BIND params[10];
char is_null[10] = {0};
params[0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
params[0].buffer_length = sizeof(v.ts[0]);
params[0].buffer = v.ts;
params[0].length = t64_len;
params[0].is_null = is_null;
params[0].num = 10;
params[1].buffer_type = TSDB_DATA_TYPE_BOOL;
params[1].buffer_length = sizeof(v.b[0]);
params[1].buffer = v.b;
params[1].length = t8_len;
params[1].is_null = is_null;
params[1].num = 10;
params[2].buffer_type = TSDB_DATA_TYPE_TINYINT;
params[2].buffer_length = sizeof(v.v1[0]);
params[2].buffer = v.v1;
params[2].length = t8_len;
params[2].is_null = is_null;
params[2].num = 10;
params[3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
params[3].buffer_length = sizeof(v.v2[0]);
params[3].buffer = v.v2;
params[3].length = t16_len;
params[3].is_null = is_null;
params[3].num = 10;
params[4].buffer_type = TSDB_DATA_TYPE_INT;
params[4].buffer_length = sizeof(v.v4[0]);
params[4].buffer = v.v4;
params[4].length = t32_len;
params[4].is_null = is_null;
params[4].num = 10;
params[5].buffer_type = TSDB_DATA_TYPE_BIGINT;
params[5].buffer_length = sizeof(v.v8[0]);
params[5].buffer = v.v8;
params[5].length = t64_len;
params[5].is_null = is_null;
params[5].num = 10;
params[6].buffer_type = TSDB_DATA_TYPE_FLOAT;
params[6].buffer_length = sizeof(v.f4[0]);
params[6].buffer = v.f4;
params[6].length = float_len;
params[6].is_null = is_null;
params[6].num = 10;
params[7].buffer_type = TSDB_DATA_TYPE_DOUBLE;
params[7].buffer_length = sizeof(v.f8[0]);
params[7].buffer = v.f8;
params[7].length = double_len;
params[7].is_null = is_null;
params[7].num = 10;
params[8].buffer_type = TSDB_DATA_TYPE_BINARY;
params[8].buffer_length = sizeof(v.bin[0]);
params[8].buffer = v.bin;
params[8].length = bin_len;
params[8].is_null = is_null;
params[8].num = 10;
params[9].buffer_type = TSDB_DATA_TYPE_NCHAR;
params[9].buffer_length = sizeof(v.blob[0]);
params[9].buffer = v.blob;
params[9].length = blob_len;
params[9].is_null = is_null;
params[9].num = 10;
sql = "insert into ? using st1 tags(?,?) values(?,?,?,?,?,?,?,?,?,?)";
code = taos_stmt_prepare(stmt, sql, 0);
if (code != 0) {
printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
return;
}
code = taos_stmt_set_tbname_tags(stmt, "m1", tags);
if (code != 0) {
printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
return;
}
int64_t ts = 1591060628000;
for (int i = 0; i < 10; ++i) {
v.ts[i] = ts++;
is_null[i] = 0;
v.b[i] = (int8_t)i % 2;
v.v1[i] = (int8_t)i;
v.v2[i] = (int16_t)(i * 2);
v.v4[i] = (int32_t)(i * 4);
v.v8[i] = (int64_t)(i * 8);
v.f4[i] = (float)(i * 40);
v.f8[i] = (double)(i * 80);
for (int j = 0; j < sizeof(v.bin[0]); ++j) {
v.bin[i][j] = (char)(i + '0');
}
strcpy(v.blob[i], "一二三四五六七八九十");
t8_len[i] = sizeof(int8_t);
t16_len[i] = sizeof(int16_t);
t32_len[i] = sizeof(int32_t);
t64_len[i] = sizeof(int64_t);
float_len[i] = sizeof(float);
double_len[i] = sizeof(double);
bin_len[i] = sizeof(v.bin[0]);
blob_len[i] = (int32_t)strlen(v.blob[i]);
}
taos_stmt_bind_param_batch(stmt, params);
taos_stmt_add_batch(stmt);
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute insert statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
return;
}
taos_stmt_close(stmt);
// query the records
stmt = taos_stmt_init(taos);
taos_stmt_prepare(stmt, "SELECT * FROM m1 WHERE v1 > ? AND v2 < ?", 0);
TAOS_MULTI_BIND qparams[2];
int8_t v1 = 5;
int16_t v2 = 15;
int32_t tinyLen = sizeof(v1);
int32_t smallLen = sizeof(v2);
qparams[0].buffer_type = TSDB_DATA_TYPE_TINYINT;
qparams[0].buffer_length = sizeof(v1);
qparams[0].buffer = &v1;
qparams[0].length = &tinyLen;
qparams[0].is_null = NULL;
qparams[0].num = 1;
qparams[1].buffer_type = TSDB_DATA_TYPE_SMALLINT;
qparams[1].buffer_length = sizeof(v2);
qparams[1].buffer = &v2;
qparams[1].length = &smallLen;
qparams[1].is_null = NULL;
qparams[1].num = 1;
taos_stmt_bind_param(stmt, qparams);
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute select statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
taos_stmt_close(stmt);
return;
}
result = taos_stmt_use_result(stmt);
TAOS_ROW row;
int rows = 0;
int num_fields = taos_num_fields(result);
TAOS_FIELD* fields = taos_fetch_fields(result);
// fetch the records row by row
while ((row = taos_fetch_row(result))) {
char temp[256] = {0};
rows++;
taos_print_row(temp, row, fields, num_fields);
printf("%s\n", temp);
}
taos_free_result(result);
taos_stmt_close(stmt);
free(t8_len);
free(t16_len);
free(t32_len);
free(t64_len);
free(float_len);
free(double_len);
free(bin_len);
free(blob_len);
}
void retrieve_callback(void* param, TAOS_RES* tres, int numOfRows) {
if (numOfRows > 0) {
printf("%d rows async retrieved\n", numOfRows);
taos_fetch_rows_a(tres, retrieve_callback, param);
} else {
if (numOfRows < 0) {
printf("\033[31masync retrieve failed, code: %d\033[0m\n", numOfRows);
} else {
printf("async retrieve completed\n");
}
taos_free_result(tres);
}
}
void select_callback(void* param, TAOS_RES* tres, int code) {
if (code == 0 && tres) {
taos_fetch_rows_a(tres, retrieve_callback, param);
} else {
printf("\033[31masync select failed, code: %d\033[0m\n", code);
}
}
void verify_async(TAOS* taos) {
prepare_data(taos);
taos_query_a(taos, "select * from meters", select_callback, NULL);
usleep(1000000);
}
void stream_callback(void* param, TAOS_RES* res, TAOS_ROW row) {
if (res == NULL || row == NULL) {
return;
}
int num_fields = taos_num_fields(res);
TAOS_FIELD* fields = taos_fetch_fields(res);
printf("got one row from stream_callback\n");
char temp[256] = {0};
taos_print_row(temp, row, fields, num_fields);
puts(temp);
}
int main(int argc, char* argv[]) {
const char* host = "127.0.0.1";
const char* user = "root";
const char* passwd = "taosdata";
taos_options(TSDB_OPTION_TIMEZONE, "GMT-8");
TAOS* taos = taos_connect(host, user, passwd, "", 0);
if (taos == NULL) {
printf("\033[31mfailed to connect to db, reason:%s\033[0m\n", taos_errstr(taos));
exit(1);
}
const char* info = taos_get_server_info(taos);
printf("server info: %s\n", info);
info = taos_get_client_info(taos);
printf("client info: %s\n", info);
printf("************ verify query *************\n");
verify_query(taos);
printf("********* verify async query **********\n");
verify_async(taos);
printf("************ verify prepare *************\n");
verify_prepare(taos);
printf("************ verify prepare2 *************\n");
verify_prepare2(taos);
printf("************ verify prepare3 *************\n");
verify_prepare3(taos);
printf("done\n");
taos_close(taos);
taos_cleanup();
}
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