Postgres 创建触发器函数失败； '返回附近的语法错误'

Question

我是一个 postgres 菜鸟，想为我的 admins 表创建一个触发器函数。 我正在关注一个在线示例，检查了类似问题并尝试了各种在线示例，但我仍然卡住了。

我有一张表admins

CREATE TABLE admins (
admin_name      varchar(15) PRIMARY KEY NOT NULL,
password        text NOT NULL,
telephone       varchar(15) NOT NULL UNIQUE,
email           varchar(30) NOT NULL UNIQUE,
added           timestamp DEFAULT CURRENT_TIMESTAMP,
name            varchar(30) NOT NULL,
active          boolean DEFAULT true     
);

还有一个审计表aud_admins

CREATE TABLE aud_admins (
admin_name      varchar(15) PRIMARY KEY NOT NULL,
password        text NOT NULL,
telephone       varchar(15) NOT NULL UNIQUE,
email           varchar(30) NOT NULL UNIQUE,
added           timestamp DEFAULT CURRENT_TIMESTAMP,
name            varchar(30) NOT NULL,
active          boolean DEFAULT true,
updated         timestamp DEFAULT CURRENT_TIMESTAMP,  
func            varchar(15)  NOT NULL     
);

• 我正在尝试创建一个存储的触发器函数，以便在发生更改但严重失败时更新 aud_admins 表

这是我的触发函数代码：

CREATE OR REPLACE FUNCTION public.audit_admins()
RETURNS trigger AS
$BODY$
BEGIN 
IF (TG_OP = 'DELETE') THEN
    INSERT INTO aud_admins (admin_name,password,telephone,email,added,name,active,func) VALUES (OLD.admin_name,OLD.password,OLD.telephone,OLD.email,OLD.added,OLD.name,OLD.active,PG_OP)
    RETURN OLD;
ENDIF;
IF (TG_OP = 'INSERT') THEN
     INSERT INTO aud_admins (admin_name,password,telephone,email,added,name,active,func) VALUES (NEW.admin_name,NEW.password,NEW.telephone,NEW.email,NEW.added,NEW.name,NEW.active,PG_OP)
     RETURN NEW;
ENDIF;
IF (TG_OP = 'UPDATE') THEN
    INSERT INTO aud_admins (admin_name,password,telephone,email,added,name,active,func) VALUES (OLD.admin_name,OLD.password,OLD.telephone,OLD.email,OLD.added,OLD.name,OLD.active,PG_OP)
    RETURN NEW;
ENDIF;
END;
$BODY$
LANGUAGE plpgsql VOLATILE;

每次运行都会出现这个错误

**ERROR:  syntax error at or near "RETURN"
  LINE 7:         RETURN OLD;**

基本运行时规范：

Postgres 9.5 开启 Ubuntu 16.04 使用 pgAdmin3

感谢您的宝贵时间。

Answer 1

您的INSERT 语句不以分号结尾。尝试更新到以下内容：

IF (TG_OP = 'DELETE') THEN
    INSERT INTO aud_admins (admin_name,password,telephone,email,added,name,active,func) 
    SELECT OLD.admin_name,OLD.password,OLD.telephone,OLD.email,OLD.added,OLD.name,OLD.active,PG_OP;
    RETURN OLD;
END IF;
IF (TG_OP = 'INSERT') THEN
     INSERT INTO aud_admins (admin_name,password,telephone,email,added,name,active,func) 
     SELECT NEW.admin_name,NEW.password,NEW.telephone,NEW.email,NEW.added,NEW.name,NEW.active,PG_OP;
     RETURN NEW;
END IF;
IF (TG_OP = 'UPDATE') THEN
    INSERT INTO aud_admins (admin_name,password,telephone,email,added,name,active,func) 
    SELECT OLD.admin_name,OLD.password,OLD.telephone,OLD.email,OLD.added,OLD.name,OLD.active,PG_OP;
    RETURN NEW;
END IF;

更新了插入，我认为您实际上需要使用INSERT 使用SELECT。试试上面修改过的代码。