瀚高数据库查询表字段及备注

Posted 2022-02-05 瀚高PG实验室

目录
环境
文档用途
详细信息

环境
系统平台：Linux x86-64 Red Hat Enterprise Linux 7
版本：6.0,4.5
文档用途
当数据库表字段有备注时，查询字段的备注名称及字段类型。

详细信息
使用如下语句进行查询（字段没有备注不显示）：

select 
	c.relname 表名,
	cast(obj_description(c.oid,'pg_class') as varchar) 名称,
	a.attname 字段,
	d.description 字段备注,
	concat_ws('',t.typname,substring(format_type(a.atttypid,a.atttypmod) from '\\(.*\\)')) as 列类型 
from pg_class c,pg_attribute a,pg_type t,pg_description d
where a.attnum > 0 and a.attrelid = c.oid and a.atttypid = t.oid and d.objoid = a.attrelid and d.objsubid = a.attnum
and c.relname in (select tablename from pg_tables where schemaname = current_schema and strpos(tablename,'_2') = 0) 
order by c.relname,a.attnum