PostgreSql 获取所有的表、视图、字段、 主键

转载自http://www.cnblogs.com/lucoo/p/5712585.html

PostgreSQL获取数据库中所有view名 视图：

SELECT viewname FROM pg_views WHERE schemaname ='public'

postgreSQL获取数据库中所有table名 表：

SELECT tablename FROM pg_tables WHERE tablename NOT LIKE 'pg%' AND tablename NOT LIKE 'sql_%' ORDER BY tablename;

postgreSQL获取某个表tablename    所有字段名称 ， 类型，备注,是否为空 等

SELECT col_description(a.attrelid,a.attnum) as comment,pg_type.typname as typename,a.attname as name, a.attnotnull as notnull FROM pg_class as c,pg_attribute as a inner join pg_type on pg_type.oid = a.atttypid where c.relname = 'tablename' and a.attrelid = c.oid and a.attnum>0

 

postgreSQL获取某个表tablename  的主键信息

select pg_attribute.attname as colname,pg_type.typname as typename,pg_constraint.conname as pk_name from pg_constraint inner join pg_class on pg_constraint.conrelid = pg_class.oid inner join pg_attribute on pg_attribute.attrelid = pg_class.oid and pg_attribute.attnum = pg_constraint.conkey[1] inner join pg_type on pg_type.oid = pg_attribute.atttypid where pg_class.relname = 'tablename' and pg_constraint.contype='p'