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