tgname---example_trigger(1row) 删除触发器 删除触发器基础语法如下: drop trigger ${trigger_name}on ${table_of_trigger_dependent}; 删除本文上表 company 上的触发器 example_trigger 的指令为: drop trigger example_trigger on company;
同类触发器如果有多个, 调用顺序则和触发器的名字有关, 按照名字的排序进行调用. 举例, 使用raise notice TG_NAME跟踪调用顺序 : // 表举例 // 创建测试表 postgres=# create table digoal (id int); CREATE TABLE // 创建触发器函数 postgres=# create or replace function debug() returns trigger as $$...
tgname --- example_trigger (1 row) 删除触发器 删除触发器基础语法如下: drop trigger ${trigger_name} on ${table_of_trigger_dependent}; 删除本文上表 company 上的触发器 example_trigger 的指令为: drop trigger example_trigger on company; PostgreSQL 索引PostgreSQL...
tgname---example_trigger (1row) 删除触发器 删除触发器基础语法如下: droptrigger${trigger_name}on${table_of_trigger_dependent}; 删除本文上表 company 上的触发器 example_trigger 的指令为: droptriggerexample_triggeroncompany; PostgreSQL 索引 索引是加速搜索引擎检索数据的一种特殊表查询。简单地说,索引...
tgname --- example_trigger (1 row) 删除触发器 删除触发器基础语法如下: drop trigger ${trigger_name} on ${table_of_trigger_dependent}; 删除本文上表 company 上的触发器 example_trigger 的指令为: drop trigger example_trigger on company; end 微信搜索:嘀嗒运维 有惊喜!编辑于 2021-11-11 16...
Example 1. A PL/pgSQL Trigger Procedure This example trigger ensures that any time a row is inserted or updated in the table, the current user name and time are stamped into the row. And it checks that an employee’s name is given and that the salary is a positive value. ...
Second, create a BEFORE INSERT trigger and associate a trigger function with it: CREATE TRIGGER trigger_name BEFORE INSERT ON table_name FOR EACH {ROW | STATEMENT} EXECUTE FUNCTION trigger_function(); PostgreSQL BEFORE INSERT trigger example First, create a table called inventory to store inventory...
runoobdb=# CREATE TRIGGER example_trigger AFTER INSERT ON COMPANY FOR EACH ROW EXECUTE PROCEDURE auditlogfunc(); 1. auditlogfunc() 是 PostgreSQL 一个程序,其定义如下: AI检测代码解析 CREATE OR REPLACE FUNCTION auditlogfunc() RETURNS TRIGGER AS $example_table$ ...
testdb=# CREATE TRIGGER example_trigger AFTER INSERT ON COMPANY FOR EACH ROW EXECUTE PROCEDURE auditlogfunc(); 1. 2. 其中auditlogfunc()是PostgreSQL 过程并具有以下定义- CREATE OR REPLACE FUNCTION auditlogfunc() RETURNS TRIGGER AS $example_table$ ...
触发器函数的返回类型为trigger, 如果需要给触发器函数传入参数, 不能定义在触发器函数的参数列表中, 而是通过其他方式传入(TriggerData数据结构). 例如使用plpgsql写的触发器函数, 通过变量TG_ARGV[]来接收传入的变量值. The trigger function must be defined before the trigger itself can be created. The ...