《TDengine v2.0 数据库文档》

返回值为JSON格式，如下:

{
    "status": "succ",
    "head": ["ts","current", …],
    "column_meta": [["ts",9,8],["current",6,4], …],
    "data": [
        ["2018-10-03 14:38:05.000", 10.3, …],
        ["2018-10-03 14:38:15.000", 12.6, …]
    ],
    "rows": 2
}

说明：

column_meta 中的列类型说明：

自定义授权码

HTTP请求中需要带有授权码，用于身份识别。授权码通常由管理员提供，可简单的通过发送HTTP GET请求来获取授权码，操作如下：

curl http://:6041/rest/login//

其中，ip是TDengine数据库的IP地址url加上时间戳，username为数据库用户名，password为数据库密码，返回值为JSON格式url加上时间戳，各字段含义如下：

获取授权码示例：

curl http://192.168.0.1:6041/rest/login/root/taosdata

返回值：

{
  "status": "succ",
  "code": 0,
  "desc": "/KfeAzX/f9na8qdtNZmtONryp201ma04bEl8LcvLUd7a8qdtNZmtONryp201ma04"
}

使用示例

curl -H 'Authorization: Basic cm9vdDp0YW9zZGF0YQ==' -d 'select * from demo.d1001' 192.168.0.1:6041/rest/sql

返回值：

{
    "status": "succ",
    "head": ["ts","current","voltage","phase"],
    "column_meta": [["ts",9,8],["current",6,4],["voltage",4,4],["phase",6,4]],
    "data": [
        ["2018-10-03 14:38:05.000",10.3,219,0.31],
        ["2018-10-03 14:38:15.000",12.6,218,0.33]
    ],
    "rows": 2
}

curl -H 'Authorization: Basic cm9vdDp0YW9zZGF0YQ==' -d 'create database demo' 192.168.0.1:6041/rest/sql

返回值：

{
    "status": "succ",
    "head": ["affected_rows"],
    "column_meta": [["affected_rows",4,4]],
    "data": [[1]],
    "rows": 1
}

其他用法结果集采用Unix时间戳

HTTP请求URL采用sqlt时，返回结果集的时间戳将采用Unix时间戳格式表示，例如

curl -H 'Authorization: Basic cm9vdDp0YW9zZGF0YQ==' -d 'select * from demo.d1001' 192.168.0.1:6041/rest/sqlt

返回值：

{
    "status": "succ",
    "head": ["ts","current","voltage","phase"],
    "column_meta": [["ts",9,8],["current",6,4],["voltage",4,4],["phase",6,4]],
    "data": [
        [1538548685000,10.3,219,0.31],
        [1538548695000,12.6,218,0.33]
    ],
    "rows": 2
}

结果集采用UTC时间字符串

HTTP请求URL采用sqlutc时，返回结果集的时间戳将采用UTC时间字符串表示，例如

  curl -H 'Authorization: Basic cm9vdDp0YW9zZGF0YQ==' -d 'select * from demo.t1' 192.168.0.1:6041/rest/sqlutc

返回值：

{
    "status": "succ",
    "head": ["ts","current","voltage","phase"],
    "column_meta": [["ts",9,8],["current",6,4],["voltage",4,4],["phase",6,4]],
    "data": [
        ["2018-10-03T14:38:05.000+0800",10.3,219,0.31],
        ["2018-10-03T14:38:15.000+0800",12.6,218,0.33]
    ],
    "rows": 2
}

重要配置项

下面仅列出一些与RESTful接口有关的配置参数，其他系统参数请看配置文件里的说明。注意：配置修改后，需要重启taosd服务才能生效