PG_GET_COLS
返回表或视图定义的列元数据。
语法
pg_get_cols('name')
Arguments
- 名称
-
Amazon Redshift 表或视图的名称。
返回类型
VARCHAR
使用说明
PG_GET_COLS 函数为表或视图定义中的每个列返回一行内容。该行包含一个逗号分隔列表，其中包括 schema 名称、关系名称、列名、数据类型和列编号。
示例
以下示例会返回名为 SALES_VW 的视图的列元数据。
select pg_get_cols('sales_vw'); pg_get_cols ----------------------------------------------------------- (public,sales_vw,salesid,integer,1) (public,sales_vw,listid,integer,2) (public,sales_vw,sellerid,integer,3) (public,sales_vw,buyerid,integer,4) (public,sales_vw,eventid,integer,5) (public,sales_vw,dateid,smallint,6) (public,sales_vw,qtysold,smallint,7) (public,sales_vw,pricepaid,"numeric(8,2)",8) (public,sales_vw,commission,"numeric(8,2)",9) (public,sales_vw,saletime,"timestamp without time zone",10)
以下示例会以表格式返回 SALES_VW 视图的列元数据。
select * from pg_get_cols('sales_vw') cols(view_schema name, view_name name, col_name name, col_type varchar, col_num int); view_schema | view_name | col_name | col_type | col_num ------------+-----------+------------+-----------------------------+-------- public | sales_vw | salesid | integer | 1 public | sales_vw | listid | integer | 2 public | sales_vw | sellerid | integer | 3 public | sales_vw | buyerid | integer | 4 public | sales_vw | eventid | integer | 5 public | sales_vw | dateid | smallint | 6 public | sales_vw | qtysold | smallint | 7 public | sales_vw | pricepaid | numeric(8,2) | 8 public | sales_vw | commission | numeric(8,2) | 9 public | sales_vw | saletime | timestamp without time zone | 10