Re: Using Schema Diff in SQL Developer - fails to function

From: DA Morgan <>
Date: Tue, 05 Jun 2007 17:30:20 -0700
Message-ID: <>

oaksong wrote:
> On Jun 5, 12:51 pm, wrote:

>> On Tue, 05 Jun 2007 11:40:24 -0700, oaksong <>
>> wrote:
>>> I'm trying to compare two database schemas with Schema Diff in Oracle
>>> SQL Developer. It worked, once. I've not been able to get it to work
>>> again. It reports no errors and it does nothing. That is, the feed
>>> back bar pops up and slides across a couple times then puts me on the
>>> output tab, which is empty.
>>> Any suggestions would be appreciated.
>>> Details:
>>> I'm mapped to two versions of my database, development and production.
>>> I'm trying to generate a script to update production to look like
>>> development. The one time the Schema Diff ran and produced output I
>>> got all of the necessary script to perform the changes.
>>> The script was run, but generated quite a few errors. At this point it
>>> would save a lot of time if I could get the Diff engine to produce a
>>> script that I could review and run in pieces. While I can view the
>>> schema components via the SQL Developer interface, the Diff engine
>>> fails to perform.
>>> tia
>>> Chris
>> According to my dictionary 'fail' can have multiple meanings. My
>> crystall ball doesn't manage to see what failure you have.
>> Also, do those Oracle databases by any chance have version numbers
>> inscribed on their shirts?
>> Care to share them?
>> --
>> Sybrand Bakker
>> Senior Oracle DBA

> Your crystal ball apparently doesn't come with glasses, since I
> clearly stated that no output was produced. That's a failure in my
> book. If you compare two things that you know have differences and the
> software doesn't display the differences, it's failed.
> Version is irrelevant to this process. The process generates ddl and
> then looks at the ddl from the schemas and compares them. I could be
> comparing MS SQL to Oracle and I should still get output. As it
> happens the databases are both 10g2.
> I've also just discovered that the script this tool produced was
> dropping many of the columns immediately after it was adding them, so
> I think the Oracle SQL Developer tool needs to go back to the shop for
> some work. It's behavior is somewhat less than logical. I don't like
> to be an un-notified Beta tester, which appears to be my current
> position vis-a-vis this product, but it wouldn't be the first time
> some major vendor has put out a badly tested tool.

The tool designed for the purpose is DBMS_RECTIFIER_DIFF

You find it documented with demos in Morgan's Library at

Daniel A. Morgan
University of Washington
(replace x with u to respond)
Puget Sound Oracle Users Group
Received on Wed Jun 06 2007 - 02:30:20 CEST

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