mysql 触发器自动创建表分区_自动创建分区表及触发器

分区表自动生成脚本

CREATE FUNCTION "public"."create_table_partition"(IN tablename varchar) RETURNS "text"

AS $BODY$

declare

date_suffix varchar(6);

sqlCon varchar;

p_table varchar;

begin

for i in -72..72 loop

select to_char(now() + interval '1 month' * i,'yyyyMM') into date_suffix;

p_table='p_'||tablename||'_'||date_suffix;

raise notice '%',p_table;

sqlCon = 'create table '||p_table||' (

check ( finance_month = '||date_suffix||' )

) INHERITS ('||tablename||')';

EXECUTE sqlCon;

end loop;

RETURN date_suffix;

end;

$BODY$

LANGUAGE plpgsql

COST 100

CALLED ON NULL INPUT

SECURITY INVOKER

VOLATILE;

这个主要是创建前后6年的分区，每个分区表是以月为后缀的，-72...72这个是时间范围可以自行修改。 再来看看自动创建触发器的脚本

CREATE FUNCTION "public"."create_table_insert_trigger"(IN tablename varchar) RETURNS "text"

AS $BODY$

declare

date_suffix varchar(6);

sqlCon varchar;

p_table varchar;

tmp integer :=0;

sqlTrigger varchar;

begin

sqlCon = 'CREATE OR REPLACE FUNCTION '||tablename||'_insert_trigger()

RETURNS TRIGGER AS $$

BEGIN

';

sqlTrigger = 'CREATE TRIGGER trg_insert_'||tablename||' BEFORE INSERT ON "public"."'||tablename||'" FOR EACH ROW EXECUTE PROCEDURE "'||tablename||'_insert_trigger"();

COMMENT ON TRIGGER "trg_insert_'||tablename||'" ON "public"."'||tablename||'" IS NULL;';

for i in -72..72 loop

select to_char(now() + interval '1 month' * i,'yyyyMM') into date_suffix;

p_table='p_'||tablename||'_'||date_suffix;

IF tmp=0 THEN

sqlCon = sqlCon || 'IF ( NEW.finance_month = '||date_suffix||') THEN

INSERT INTO '||p_table||' VALUES (NEW.*);

';

tmp =1;

ELSE

sqlCon = sqlCon || 'ELSIF ( NEW.finance_month = '||date_suffix||') THEN

INSERT INTO '||p_table||' VALUES (NEW.*);

';

END if;

end loop;

sqlCon = sqlCon || 'END IF;

RETURN NULL;

END;

$$

LANGUAGE plpgsql;';

EXECUTE sqlCon;

EXECUTE sqlTrigger;

RETURN sqlCon;

end;

$BODY$

LANGUAGE plpgsql

COST 100

CALLED ON NULL INPUT

SECURITY INVOKER

VOLATILE;

这个脚本会将前面通过分区脚本创建的分区表中加上相应的触发器，好了，脚本很好理解就不多说了，有问题请留言。