查询表的Schema。

语法

describe_table_statement ::= DESCRIBE TABLE table_name

示例

> describe table sensor;
+--------------+-----------+
|  columnName  | typeName  |
+--------------+-----------+
| device_id    | VARCHAR   |
| region       | VARCHAR   |
| time         | BIGINT    |
| temperature  | DOUBLE    |
| humidity     | DOUBLE    |
+--------------+-----------+
5 rows selected (0.075 seconds)