PostgreSQL获取table名，字段名

PostgreSQL获取数据库中所有table名：

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

PostgreSQL获取数据库中所有table名及table的注解信息：

SELECT   tablename,obj_description(relfilenode,'pg_class')  FROM   pg_tables  a, pg_class b
WHERE   
a.tablename = b.relname
and a.tablename   NOT   LIKE   'pg%'  
AND a.tablename NOT LIKE 'sql_%'
ORDER   BY   a.tablename;

PostgreSQL获取指定table的所有字段信息：

SELECT col_description(a.attrelid,a.attnum) as comment,format_type(a.atttypid,a.atttypmod) as type,a.attname as name, a.attnotnull as notnull
FROM pg_class as c,pg_attribute as a
where c.relname = 'tablename' and a.attrelid = c.oid and a.attnum>0