例如,我创建了这样一个触发器:
CREATE EVENT TRIGGER tr_event_begin
ON ddl_command_start
EXECUTE PROCEDURE event_trigger_begin ( );
现在可以从哪个表格中拉出相同的表格?或至少部分。 information_schema.triggers不包含它,因为它是一个事件触发器,而不是普通的触发器。
答案 0 :(得分:0)
样品:
et=# create or replace function event_trigger_begin() returns event_trigger as $$ begin raise info '%',99; end;$$ language plpgsql;
CREATE FUNCTION
Time: 27.611 ms
et=# CREATE EVENT TRIGGER tr_event_begin
ON ddl_command_start
EXECUTE PROCEDURE event_trigger_begin ( );
CREATE EVENT TRIGGER
Time: 18.293 ms
et=# create table i (i int);
INFO: 99
CREATE TABLE
您可以使用pg_catalog
关系为event_triggers生成DDL,如:
et=# SELECT format('CREATE EVENT TRIGGER %I ON %s EXECUTE PROCEDURE %I()',evtname,evtevent,evtfoid::regproc) as ddl
FROM pg_event_trigger;
ddl
--------------------------------------------------------------------------------------------------
CREATE EVENT TRIGGER tr_event_begin ON ddl_command_start EXECUTE PROCEDURE event_trigger_begin()
(1 row)
最后获得定义的正确方法:
MacBook-Air:~ vao$ pg_dump -d et -s | tail -20
CREATE FUNCTION event_trigger_begin() RETURNS event_trigger
LANGUAGE plpgsql
AS $$ begin raise info '%',99; end;$$;
ALTER FUNCTION public.event_trigger_begin() OWNER TO vao;
--
-- Name: tr_event_begin; Type: EVENT TRIGGER; Schema: -; Owner: vao
--
CREATE EVENT TRIGGER tr_event_begin ON ddl_command_start
EXECUTE PROCEDURE public.event_trigger_begin();
当然dbname不会et和tail不起作用 - 我用jsut来截断输出