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optimized the cpp connector sample code page

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Yaming Pei 2024-08-22 11:58:04 +08:00
parent 9ddfefc6bf
commit d93e15b552
2 changed files with 10 additions and 150 deletions
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36
docs/en/14-reference/05-connectors/10-cpp.mdx
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@ -68,49 +68,23 @@ This section shows sample code for standard access methods to TDengine clusters
### Synchronous query example
<details>
<summary>Synchronous query</summary>
[C example] (https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/demo.c)
</details>
- [C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/demo.c)
### Asynchronous query example
<details>
<summary>Asynchronous queries</summary>
[C example] (https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/asyncdemo.c)
</details>
- [C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/asyncdemo.c)
### Parameter binding example
<details>
<summary>Parameter Binding</summary>
[C example] (https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/prepare.c)
</details>
- [C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/prepare.c)
### Pattern-free writing example
<details>
<summary>Mode free write</summary>
[C example] (https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/schemaless.c)
</details>
- [C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/schemaless.c)
### Subscription and consumption example
<details>
<summary>Subscribe and consume</summary>
```c
```
</details>
- [C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/tmq.c)
:::info
More example code and downloads are available at [GitHub](https://github.com/taosdata/TDengine/tree/develop/docs/examples/c).

124
docs/zh/14-reference/05-connector/10-cpp.mdx
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@ -42,137 +42,23 @@ TDengine 客户端驱动的版本号与 TDengine 服务端的版本号是一一
### 同步查询示例
<details>
<summary>同步查询</summary>
请参考：[C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/demo.c)
格式化输出不同类型字段函数 taos_print_row
```c
int taos_print_row(char *str, TAOS_ROW row, TAOS_FIELD *fields, int num_fields) {
int32_t len = 0;
for (int i = 0; i < num_fields; ++i) {
if (i > 0) {
str[len++] = ' ';
}
if (row[i] == NULL) {
len += sprintf(str + len, "%s", TSDB_DATA_NULL_STR);
continue;
}
switch (fields[i].type) {
case TSDB_DATA_TYPE_TINYINT:
len += sprintf(str + len, "%d", *((int8_t *)row[i]));
break;
case TSDB_DATA_TYPE_UTINYINT:
len += sprintf(str + len, "%u", *((uint8_t *)row[i]));
break;
case TSDB_DATA_TYPE_SMALLINT:
len += sprintf(str + len, "%d", *((int16_t *)row[i]));
break;
case TSDB_DATA_TYPE_USMALLINT:
len += sprintf(str + len, "%u", *((uint16_t *)row[i]));
break;
case TSDB_DATA_TYPE_INT:
len += sprintf(str + len, "%d", *((int32_t *)row[i]));
break;
case TSDB_DATA_TYPE_UINT:
len += sprintf(str + len, "%u", *((uint32_t *)row[i]));
break;
case TSDB_DATA_TYPE_BIGINT:
len += sprintf(str + len, "%" PRId64, *((int64_t *)row[i]));
break;
case TSDB_DATA_TYPE_UBIGINT:
len += sprintf(str + len, "%" PRIu64, *((uint64_t *)row[i]));
break;
case TSDB_DATA_TYPE_FLOAT: {
float fv = 0;
fv = GET_FLOAT_VAL(row[i]);
len += sprintf(str + len, "%f", fv);
} break;
case TSDB_DATA_TYPE_DOUBLE: {
double dv = 0;
dv = GET_DOUBLE_VAL(row[i]);
len += sprintf(str + len, "%lf", dv);
} break;
case TSDB_DATA_TYPE_BINARY:
case TSDB_DATA_TYPE_NCHAR: {
int32_t charLen = varDataLen((char *)row[i] - VARSTR_HEADER_SIZE);
if (fields[i].type == TSDB_DATA_TYPE_BINARY) {
assert(charLen <= fields[i].bytes && charLen >= 0);
} else {
assert(charLen <= fields[i].bytes * TSDB_NCHAR_SIZE && charLen >= 0);
}
memcpy(str + len, row[i], charLen);
len += charLen;
} break;
case TSDB_DATA_TYPE_TIMESTAMP:
len += sprintf(str + len, "%" PRId64, *((int64_t *)row[i]));
break;
case TSDB_DATA_TYPE_BOOL:
len += sprintf(str + len, "%d", *((int8_t *)row[i]));
default:
break;
}
}
str[len] = 0;
return len;
}
```
</details>
- 请参考：[C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/demo.c)
### 异步查询示例
<details>
<summary>异步查询</summary>
请参考：[C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/asyncdemo.c)
</details>
- 请参考：[C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/asyncdemo.c)
### 参数绑定示例
<details>
<summary>参数绑定</summary>
请参考：[C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/prepare.c)
</details>
- 请参考：[C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/prepare.c)
### 无模式写入示例
<details>
<summary>无模式写入</summary>
请参考：[C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/schemaless.c)
</details>
- 请参考：[C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/schemaless.c)
### 订阅和消费示例
<details>
<summary>订阅和消费</summary>
请参考：[C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/tmq.c)
</details>
- 请参考：[C example](https://github.com/taosdata/TDengine/tree/3.0/docs/examples/c/tmq.c)
:::info
更多示例代码及下载请见 [GitHub](https://github.com/taosdata/TDengine/tree/develop/docs/examples/c)。