improve doc
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sheyanjie-qq
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ed99f12573
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1f6f4df25b
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@ -22,76 +22,56 @@
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#include <string.h>
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#include "taos.h"
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static int DemoWithReqId() {
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// ANCHOR: with_reqid
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const char *ip = "localhost";
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const char *user = "root";
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const char *password = "taosdata";
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// ANCHOR: with_reqid
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const char *ip = "localhost";
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const char *user = "root";
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const char *password = "taosdata";
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// connect
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TAOS *taos = taos_connect(ip, user, password, NULL, 0);
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if (taos == NULL) {
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printf("failed to connect to server %s, reason: %s\n", ip, taos_errstr(NULL));
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taos_cleanup();
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return -1;
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}
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printf("success to connect server %s\n", ip);
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// connect
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TAOS *taos = taos_connect(ip, user, password, NULL, 0);
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if (taos == NULL) {
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printf("failed to connect to server %s, reason: %s\n", ip, taos_errstr(NULL));
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taos_cleanup();
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return -1;
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}
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printf("success to connect server %s\n", ip);
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// create database
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TAOS_RES *result = taos_query_with_reqid(taos, "CREATE DATABASE IF NOT EXISTS power", 1L);
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int code = taos_errno(result);
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if (code != 0) {
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printf("failed to create database power, reason: %s\n", taos_errstr(result));
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const char *sql = "SELECT ts, current, location FROM power.meters limit 1";
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// query data with reqid
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TAOS_RES *result = taos_query_with_reqid(taos, sql, 3L);
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int code = taos_errno(result);
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if (code != 0) {
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printf("failed to query data from power.meters, ip: %s, reason: %s\n", ip, 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_ROW row = NULL;
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int rows = 0;
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int num_fields = taos_field_count(result);
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TAOS_FIELD *fields = taos_fetch_fields(result);
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printf("fields: %d\n", num_fields);
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printf("sql: %s, result:\n", sql);
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// fetch the records row by row
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while ((row = taos_fetch_row(result))) {
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char temp[1024] = {0};
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rows++;
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taos_print_row(temp, row, fields, num_fields);
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printf("%s\n", temp);
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}
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printf("total rows: %d\n", rows);
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taos_free_result(result);
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printf("success to query data from power.meters\n");
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// close & clean
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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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printf("success to create database power\n");
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// use database
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result = taos_query_with_reqid(taos, "USE power", 2L);
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taos_free_result(result);
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// query data
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const char* sql = "SELECT ts, current, location FROM power.meters limit 1";
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result = taos_query_with_reqid(taos, sql, 3L);
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code = taos_errno(result);
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if (code != 0) {
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printf("failed to query data from power.meters, ip: %s, reason: %s\n", ip, 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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return 0;
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// ANCHOR_END: with_reqid
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}
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TAOS_ROW row = NULL;
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int rows = 0;
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int num_fields = taos_field_count(result);
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TAOS_FIELD *fields = taos_fetch_fields(result);
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printf("fields: %d\n", num_fields);
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printf("sql: %s, result:\n", sql);
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// fetch the records row by row
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while ((row = taos_fetch_row(result))) {
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char temp[1024] = {0};
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rows++;
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taos_print_row(temp, row, fields, num_fields);
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printf("%s\n", temp);
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}
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printf("total rows: %d\n", rows);
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taos_free_result(result);
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printf("success to query data from power.meters\n");
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// close & clean
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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: with_reqid
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}
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int main(int argc, char *argv[]) {
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return DemoWithReqId();
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}
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int main(int argc, char *argv[]) { return DemoWithReqId(); }
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@ -273,6 +273,12 @@ URL 和 Properties 的详细参数说明和如何使用详见 [url 规范](../..
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</TabItem>
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<TabItem label="Python" value="python">
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Python 连接器使用 `connect()` 方法来建立连接，下面是连接参数的具体说明：
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- url： `taosAdapter` REST 服务的 URL。默认是 `localhost` 的 `6041` 端口。
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- user： TDengine 用户名。默认是 `root`。
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- password： TDengine 用户密码。默认是 `taosdata`。
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- timeout： HTTP 请求超时时间。单位为秒。默认为 `socket._GLOBAL_DEFAULT_TIMEOUT`。一般无需配置。
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</TabItem>
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<TabItem label="Go" value="go">
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@ -448,7 +454,7 @@ C/C++ 语言连接器使用 `taos_connect()` 函数用于建立与 TDengine 数
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```
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</TabItem>
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<TabItem label="C#" value="csharp">
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```csharp title="WebSocket 连接"
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```csharp
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{{#include docs/examples/csharp/connect/Program.cs:main}}
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```
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</TabItem>
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