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ddae2e481e
* test: add Makefile and test script for C ws examples * docs: add c ws new examples * docs: replace c ws examples with c ws new examples * fix: correct log file redirection syntax in c_ws scripts * style: format code * docs: update c/c++ zh doc * docs: add async demo and ws error code * docs: modify c/c++ zh doc * docs: rename asyncdemo.c to async_demo.c * docs: update c ws zh doc * docs: update c ws en docs * docs: fix typos and improve WebSocket connection documentation * docs: refactor code structure for improved readability and maintainability * docs: modify stmt en doc * fix: fix build doc errors * fix: fix return value * fix: delete taos_options * fix: fix return value * docs: update c/c++ connector docs
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
// to compile: gcc -o create_db_demo create_db_demo.c -ltaos
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "taos.h"
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static int DemoCreateDB() {
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// ANCHOR: create_db_and_table
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const char *host = "localhost";
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const char *user = "root";
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const char *password = "taosdata";
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uint16_t port = 6041;
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int code = 0;
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code = taos_options(TSDB_OPTION_DRIVER, "websocket");
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if (code != 0) {
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fprintf(stderr, "Failed to set driver option, code: %d\n", code);
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return -1;
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}
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// connect
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TAOS *taos = taos_connect(host, user, password, NULL, port);
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if (taos == NULL) {
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fprintf(stderr, "Failed to connect to %s:%hu, ErrCode: 0x%x, ErrMessage: %s.\n", host, port, taos_errno(NULL),
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taos_errstr(NULL));
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taos_cleanup();
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return -1;
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}
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// create database
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TAOS_RES *result = taos_query(taos, "CREATE DATABASE IF NOT EXISTS power");
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code = taos_errno(result);
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if (code != 0) {
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fprintf(stderr, "Failed to create database power, ErrCode: 0x%x, ErrMessage: %s.\n", code, taos_errstr(result));
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taos_close(taos);
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taos_cleanup();
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return -1;
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}
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taos_free_result(result);
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fprintf(stdout, "Create database power successfully.\n");
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// create table
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const char *sql =
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"CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId "
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"INT, location BINARY(24))";
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result = taos_query(taos, sql);
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code = taos_errno(result);
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if (code != 0) {
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fprintf(stderr, "Failed to create stable power.meters, ErrCode: 0x%x, ErrMessage: %s\n.", code,
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taos_errstr(result));
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taos_close(taos);
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taos_cleanup();
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return -1;
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}
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taos_free_result(result);
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fprintf(stdout, "Create stable power.meters successfully.\n");
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taos_close(taos);
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taos_cleanup();
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return 0;
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// ANCHOR_END: create_db_and_table
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}
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int main() { return DemoCreateDB(); }
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