PL/SQL 在触发器内部执行 TRIM

Question

我正在尝试创建一个触发器，当插入数据时，它会修剪正在插入的数据。

这是我正在尝试的..

CREATE OR REPLACE TRIGGER trig_trim
BEFORE INSERT ON triggertest
FOR EACH ROW

BEGIN
  TRIM(:new.testchar);  
END;
/

我做这样的插入

INSERT INTO triggertest (testnum, testchar) VALUES (9, ' r9 ');

我收到这个错误...

04098. 00000 -  "trigger '%s.%s' is invalid and failed re-validation"
*Cause:    A trigger was attempted to be retrieved for execution and was
           found to be invalid.  This also means that compilation/authorization
           failed for the trigger.
*Action:   Options are to resolve the compilation/authorization errors,
           disable the trigger, or drop the trigger.

当我运行创建触发器的代码时，我得到了这个

TRIGGER TRIG_TRIM compiled
Errors: check compiler log

并且在编译器日志中显示“'TRIM' 不是过程或未定义”

是我的语法错误还是我的逻辑错误？我不知道为什么会失败。

Answer 1

TRIM 必须 return 结果。我想你想要：

 :new.testchar := TRIM(:new.testchar);

Answer 2

您的赋值语法错误。试试这个：

:new.testchar := TRIM(:new.testchar);

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