相关疑难解决方法(0)

我有一个函数registration(),它应该在某些情况下向表添加一行.我已经包含了一段代码和来自通话的输出.

如果select *返回一个非空表行(它根据它执行RAISE NOTICE),我想引发异常而不添加行.该示例似乎表明它rowt不是null,但仍然rowt IS NOT NULL返回f(并且不会引发异常).

我希望这是我看不到的小事.

select * into rowt from Email where email_email = eml;
RAISE NOTICE '%, rowt IS NOT NULL:%',rowt, rowt IS NOT NULL;
if rowt IS NOT NULL THEN
   RAISE EXCEPTION 'email address, %, already registered.' , eml;
END IF;

输出:

NOTICE:  (7,,,), rowt IS NOT NULL:f

registration 
--------------
    21
(1 row)

CREATE TABLE IF NOT EXISTS Email ( 
   email_email VARCHAR(50) NOT …