PosgreSQ批量删除分区表\批量修改表属性

CREATE Or replace FUNCTION del_tables(tblname varchar,sof int,eof int) RETURNS void AS $$
DECLARE
    tmp VARCHAR(512);
BEGIN
  FOR sof IN sof..eof LOOP
    tmp := 'DROP TABLE IF EXISTS '|| tblname||sof||';' ;
    RAISE NOTICE 'notice: %', tmp;
    EXECUTE 'DROP TABLE IF EXISTS '|| tblname||sof||';' ;
  END LOOP;
  RAISE NOTICE 'finished .....';
END;
 
$$ LANGUAGE plpgsql;


select del_tables('tablename_p',0,16);

解释

假设分区表是 tablename_p1到 tablename_p16，通过上面脚本可以一次性删除。

执行结果

skynet=# select del_tables('tablename_p',0,16);
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p0;
NOTICE:  table "tablename_p0" does not exist, skipping
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p1;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p2;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p3;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p4;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p5;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p6;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p7;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p8;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p9;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p10;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p11;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p12;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p13;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p14;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p15;
NOTICE:  notice: DROP TABLE IF EXISTS tablename_p16;
NOTICE:  finished .....
 del_tables 
------------

其实可以通过excel生成删除语句，一次性执行就好了。没必要用这些脚本，只是为了学习一下存储过程。

批量修改表owner

DO $$DECLARE r record;
BEGIN
FOR r IN SELECT tablename FROM pg_tables WHERE schemaname = 'public'
LOOP
    EXECUTE 'alter table '|| r.tablename ||' owner to snabu;';
END LOOP;
END$$;