创建触发器以仅在创建新表时运行 [英] Creating a trigger to only run when a new table is being created

问题描述

我知道我可以使用这个来创建DDL创建触发器;

I know that I can use this to create DDL create trigger;

CREATE OR REPLACE TRIGGER 
  create_table_trigger
  AFTER CREATE ON SCHEMA
DECLARE
BEGIN
END;

<如何只能为创建表DDL执行此操作？

Problem is this trigger would run on DDLs like 'Create sequence'; how can I only execute this for 'Create Table' DDLs?

推荐答案

CREATE OR REPLACE TRIGGER 
  create_table_trigger
  AFTER CREATE ON SCHEMA
BEGIN
  IF SYS.DICTIONARY_OBJ_TYPE = 'TABLE' THEN
      ....
END;

有关EVENT属性的列表，请参阅此页

http://ist.marshall.edu/ist480adbp/plsql_triggers.html （链接已关闭）

For a list of EVENT attributes, refer to this page
http://ist.marshall.edu/ist480adbp/plsql_triggers.html (link is down)

据我所知，dictionary_obj_type是以下之一：
TABLE | SEQUENCE | PROCEDURE | INDEX | FUNCTION | TYPE | PACKAGE

As far as I know, dictionary_obj_type is one of TABLE|SEQUENCE|PROCEDURE|INDEX|FUNCTION|TYPE|PACKAGE

而dictionary_obj_name只是表/序列/ proc / etc的名称。

And dictionary_obj_name is just the name of the table/sequence/proc/etc.

• dictionary_obj_type
dictionary_obj_name 返回用于触发DDL操作的字典对象的名称。已触发触发器。

• dictionary_obj_type Returns the type of the dictionary object on which the DDL operation that fired the trigger occurred.
• dictionary_obj_name Returns the name of the dictionary object on which the DDL operation that fired the trigger occurred.

这篇关于创建触发器以仅在创建新表时运行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！