postgresql 建立删除分区表

常经常添加分区表，和清理分区表，很简单的2个函数

--添加分区表

CREATE OR REPLACE FUNCTION create_table(table_name character varying,table_num integer)

 RETURNS void

 LANGUAGE plpgsql

AS $function$

declare

v_date      char(8);

v_tablename  varchar(64);

begin

 

for i in 0..table_num loop

v_date      :=to_char(current_date + i,'YYYYMMDD');

v_tablename := table_name ||'_'|| v_date;

execute  'create table ' || v_tablename ||'(like '||table_name||' including all) inherits('||table_name||')';

execute 'grant select on ' || v_tablename || ' to dwetl';

end loop;

end

$function$;

--删除分区表

CREATE OR REPLACE FUNCTION drop_table(table_name character varying,table_num integer)

 RETURNS void

 LANGUAGE plpgsql

AS $function$

declare

v_date      char(8);

v_tablename  varchar(64);

begin

 

for i in 0..table_num loop

v_date      :=to_char(current_date + i,'YYYYMMDD');

v_tablename := table_name ||'_'|| v_date;

execute  'drop table ' || v_tablename;

end loop;

end

$function$;

--执行函数

select create_table('table_name',table_num);

select drop_table('table_name',table_num);

--删除函数

drop FUNCTION create_table(table_name character varying,table_num integer); #必须写上输入参数

drop FUNCTION drop_table(table_name character varying,table_num integer);