142 lines
3.6 KiB
C
142 lines
3.6 KiB
C
// sample code for TDengine subscribe/consume API
|
|
// to compile: gcc -o subscribe subscribe.c -ltaos
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <taos.h> // include TDengine header file
|
|
#include <unistd.h>
|
|
|
|
|
|
void showme();
|
|
float calculate_delta_t(size_t size);
|
|
int is_lossless_compressed_data(unsigned char* compressedBytes, size_t cmpSize);
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <inttypes.h>
|
|
#include <taos.h> // TAOS header file
|
|
|
|
static void queryDB(TAOS *taos, char *command) {
|
|
|
|
printf("aaa");
|
|
/*
|
|
int i;
|
|
TAOS_RES *pSql = NULL;
|
|
int32_t code = -1;
|
|
|
|
for (i = 0; i < 5; i++) {
|
|
if (NULL != pSql) {
|
|
taos_free_result(pSql);
|
|
pSql = NULL;
|
|
}
|
|
|
|
pSql = taos_query(taos, command);
|
|
code = taos_errno(pSql);
|
|
if (0 == code) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (code != 0) {
|
|
fprintf(stderr, "Failed to run %s, reason: %s\n", command, taos_errstr(pSql));
|
|
taos_free_result(pSql);
|
|
taos_close(taos);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
taos_free_result(pSql);
|
|
*/
|
|
}
|
|
|
|
void Test(TAOS *taos, char *qstr, int i);
|
|
|
|
int main(int argc, char *argv[]) {
|
|
//char qstr[1024];
|
|
|
|
is_lossless_compressed_data(NULL,0);
|
|
|
|
// connect to server
|
|
if (argc < 2) {
|
|
printf("please input server-ip \n");
|
|
return 0;
|
|
}
|
|
|
|
TAOS *taos = taos_connect(argv[1], "root", "taosdata", NULL, 0);
|
|
if (taos == NULL) {
|
|
printf("failed to connect to server, reason:%s\n", "null taos"/*taos_errstr(taos)*/);
|
|
exit(1);
|
|
}
|
|
/*
|
|
for (int i = 0; i < 100; i++) {
|
|
Test(taos, qstr, i);
|
|
}
|
|
taos_close(taos);
|
|
taos_cleanup();
|
|
*/
|
|
}
|
|
void Test(TAOS *taos, char *qstr, int index) {
|
|
|
|
printf("==================test at %d\n================================", index);
|
|
|
|
queryDB(taos, "drop database if exists demo");
|
|
queryDB(taos, "create database demo");
|
|
//TAOS_RES *result;
|
|
queryDB(taos, "use demo");
|
|
|
|
queryDB(taos, "create table m1 (ts timestamp, ti tinyint, si smallint, i int, bi bigint, f float, d double, b binary(10))");
|
|
printf("success to create table\n");
|
|
|
|
/*
|
|
int i = 0;
|
|
for (i = 0; i < 10; ++i) {
|
|
sprintf(qstr, "insert into m1 values (%" PRId64 ", %d, %d, %d, %d, %f, %lf, '%s')", (uint64_t)(1546300800000 + i * 1000), i, i, i, i*10000000, i*1.0, i*2.0, "hello");
|
|
printf("qstr: %s\n", qstr);
|
|
|
|
// note: how do you wanna do if taos_query returns non-NULL
|
|
// if (taos_query(taos, qstr)) {
|
|
// printf("insert row: %i, reason:%s\n", i, taos_errstr(taos));
|
|
// }
|
|
TAOS_RES *result1 = taos_query(taos, qstr);
|
|
if (result1 == NULL || taos_errno(result1) != 0) {
|
|
printf("failed to insert row, reason:%s\n", taos_errstr(result1));
|
|
taos_free_result(result1);
|
|
exit(1);
|
|
} else {
|
|
printf("insert row: %i\n", i);
|
|
}
|
|
taos_free_result(result1);
|
|
}
|
|
printf("success to insert rows, total %d rows\n", i);
|
|
|
|
// query the records
|
|
sprintf(qstr, "SELECT * FROM m1");
|
|
result = taos_query(taos, qstr);
|
|
if (result == NULL || taos_errno(result) != 0) {
|
|
printf("failed to select, reason:%s\n", taos_errstr(result));
|
|
taos_free_result(result);
|
|
exit(1);
|
|
}
|
|
|
|
TAOS_ROW row;
|
|
int rows = 0;
|
|
int num_fields = taos_field_count(result);
|
|
TAOS_FIELD *fields = taos_fetch_fields(result);
|
|
|
|
printf("num_fields = %d\n", num_fields);
|
|
printf("select * from table, result:\n");
|
|
// 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);
|
|
}
|
|
|
|
taos_free_result(result);
|
|
printf("====demo end====\n\n");
|
|
*/
|
|
}
|
|
|