Using User-Named Triggers in Oracle Forms

时间：2016-12-25 23:36:23 阅读：261 评论：0 收藏：0 [点我收藏+]

标签：from sage change box position float web rom splay

A user-named trigger is a trigger defined in a form by the developer. User-Named triggers do not automatically fire in response to a Form Builder event, and must be called explicitly from other triggers or user-named subprograms. Each user-named trigger defined at the same definition level must have a unique name.
To execute a user-named trigger, you must call the EXECUTE_TRIGGER built-in procedure, as shown here:

Execute_trigger(’my_user_named_trigger’);

Usage Notes:
User-named PL/SQL subprograms can be written to perform almost any task for which one might use a user-named trigger.
As with all triggers, the scope of a user-named trigger is the definition level and below. When more than one user-named trigger has the same name, the trigger defined at the lowest level has precedence.
It is most practical to define user-named triggers at the form level.
Create a user-named trigger to execute user-named subprograms defined in a form document from menu PL/SQL commands and user-named subprograms. (User-named subprograms defined in a form cannot be called directly from menu PL/SQL, which is defined in a different document.) In the menu PL/SQL, call the EXECUTE_TRIGGER built-in to execute a user-named trigger, which in turn calls the usernamed subprogram defined in the current form.

标签：from sage change box position float web rom splay

原文地址：http://www.cnblogs.com/quanweiru/p/6220551.html

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