利用 trigger 修改数据库启动USE_STORED_OUTLINES

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本文介绍如何通过创建启动触发器来永久设置Oracle的USE_STORED_OUTLINES参数为true，确保重启数据库后仍能使用存储轮廓，适用于Oracle Server Enterprise Edition 8.1.7到11.1.0.6版本。

2010年8月15日星期日

Oracle : How to Enable USE_STORED_OUTLINES Permanently

Applies to:

Oracle Server - Enterprise Edition - Version: 8.1.7 to 11.1.0.6
Information in this document applies to any platform.

Goal

A Stored Outline will only be used when the parameter USE_STORED_OUTLINES is set persistently. If parameter is set using alter session or by defining in pfile/spfile the change is not permanent and will no longer be set after database has been restarted.
A STARTUP trigger needs to be defined in order to make this setting persistent after restart of database

Solution

Create the following trigger to be run on startup of the database:
create or replace trigger enable_outlines_trig
after startup on database
begin
execute immediate('alter system set use_stored_outlines=true');
end;

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