DROP TRIGGERDROP TRIGGER — 移除一个触发器大纲DROP TRIGGER [ IF EXISTS ] name ON table_name [ CASCADE | RESTRICT ]描述DROP TRIGGER移除一个现有的触发器定义。 要执行这个命令,当前用户必须是触发器基表的拥有… 阅读全文 赞同 添加评论 ...
CREATE TRIGGER 命令都属于 DDL 语句,所以会进入 DDL 的处理流程,关键的调用路径为: ProcessUtilitySlow-->CreateTrigger-->CreateTriggerFiringOn,CreateTriggerFiringOn 函数代码超过 1000 行,因此只介绍其中的关键步骤: 根据表的 oid,打开触发器所在的表,加上 ShareRowExclusiveLock 锁 进行各种合法性检查,过滤不合...
RETURN NEW; END IF; RETURN NULL; -- result is ignored since this is an AFTER trigger END; $emp_audit$ LANGUAGE plpgsql; DROP TRIGGER if EXISTS emp_audit ON emp; CREATE TRIGGER emp_audit AFTER INSERT OR UPDATE OR DELETE ON emp FOR EACH ROW EXECUTE PROCEDURE process_emp_audit();...
TG_TABLE_SCHEMA: 触发器所在表的模式。 TG_NARGS: 在CREATETRIGGER语句里面赋予触发器过程的参数个数。 TG_ARGV[]: 为text类型的一个数组;是CREATETRIGGER语句里的参数。 八、删除触发器函数 DROPFUNCTIONsentence_insert() 九、删除触发器 DROPTRIGGERIFEXISTS触发器名称ON表名称;...
drop trigger if exists x_weather_u on weather; create trigger x_weather_u after insert or update or delete on weather for each statement execute procedure f_update_change_log(); 1. 2. 3. 4. 四、测试 在sql窗口中分别执行以下sql语句,并到t_record_change表中查看时间是否更新 ...
drop table if exists tbl221; create table tbl221(a int); CREATE or replace PROCEDURE p_transaction() LANGUAGE plpgsql AS $$ DECLARE carry float; BEGIN INSERT INTO tbl221 (a) VALUES (1); BEGIN rollback; EXCEPTION WHEN others THEN RAISE NOTICE 'in exception exception'; INSERT INTO tbl221...
CREATE TABLE IF NOT EXISTS t_trigger ( id int8 not null, action_params text, bindings varchar(200), PRIMARY KEY (id) ); INSERT INTO t_trigger VALUES ('10002955', '{"className":"ActionParamsOfRpc","service":"NapDeviceService_PullHitCountConfig","params":{"deviceType":"sky_firewall",...
--test_cond表设置了级联删除,所以不需要delete触发drop trigger if exists tri_test_change on test; drop function if exists tri_test_trigger(); create or replace function tri_test_trigger() returns trigger as $$ begin if (TG_OP = 'INSERT') then insert into test_cond(objectid,keys) values...
beginexecute'drop tableifexists test';execute'create table test(id int8 primary key, info text, crt_time timestamp)'; for i in 0..1023 loopexecuteformat('drop tableifexists test%s', i);executeformat('create table test%s (like test including all)', i); ...
DROP TABLESPACE删除一个表空间。DROP TABLESPACE tablespace_nameDROP TRIGGER删除一个触发器定义。DROP TRIGGER name ON table [ CASCADE | RESTRICT ]DROP TYPE删除一个用户定义数据类型。DROP TYPE name [, ...] [ CASCADE | RESTRICT ]DROP USER删除一个数据库用户帐号。