获取表名和表注释
select
relname as tabname,
obj_description(c.oid)
from
pg_class c
where
obj_description(c.oid) is not null ;
获取表/视图结构
SELECT * FROM pg_views;
desc v_object_mfr_where_used
select
a.attnum as "序号",
c.relname as "表名",
cast(obj_description(c.oid) as varchar) as "表名描述",
a.attname as "列名",
concat_ws('', t.typname, SUBSTRING(format_type(a.atttypid, a.atttypmod) from '\(.*\)')) as "字段类型",
d.description as "备注"
from
pg_attribute a
left join pg_description d on
d.objoid = a.attrelid
and d.objsubid = a.attnum
left join pg_class c on
a.attrelid = c.oid
left join pg_type t on
a.atttypid = t.oid
where
a.attnum >= 0
and c.relname like '表名'
order by
c.relname desc,
a.attnum asc
查询某表某列的默认值
SELECT column_default AS default_value FROM information_schema.columns WHERE table_name='表名' AND column_name='字段名' LIMIT 1;