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From "Guy Davis (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DDLUTILS-89) Lack of ordering for foreign keys in WriteSchemaToFile results in spurious diffs
Date Tue, 11 Apr 2006 19:09:20 GMT
     [ http://issues.apache.org/jira/browse/DDLUTILS-89?page=all ]

Guy Davis updated DDLUTILS-89:
------------------------------

    Attachment: order_fks.patch

This patch ensures that foreign keys are kept ordered alphabetically by name rather than the
seemingly random order the various JDBC drivers return them in.  This means the position of
the key in the schema.xml file should remain the same between running WriteSchemaToFile.

> Lack of ordering for foreign keys in WriteSchemaToFile results in spurious diffs
> --------------------------------------------------------------------------------
>
>          Key: DDLUTILS-89
>          URL: http://issues.apache.org/jira/browse/DDLUTILS-89
>      Project: DdlUtils
>         Type: Improvement

>  Environment: Oracle 10g EE
> SQLServer 2005 EE
> Windows XP SP2
> Java 1.5.0_06
>     Reporter: Guy Davis
>     Assignee: Thomas Dudziak
>  Attachments: order_fks.patch
>
> We use the WriteSchemaToFile task to store our applications schema in a file we place
in our Subversion CM tool.  Every time we run this task, it reorders the foreign keys on a
table.  So, for example, if Table A has FKs X, Y, Z then schema.xml file alternates between:
> <table ...>
>    <fk name='X' .../>
>    <fk name='Y' .../>
>    <fk name='Z' .../>
> </table>
> AND 
> <table ...>
>    <fk name='Z' .../>
>    <fk name='Y' .../>
>    <fk name='X' .../>
> </table>
> Notice, that the keys haven't changed between schema dumps, just the ordering of them
in the file.  This means tracking version changes is more complicated as a developer's real
changes are mixed in with these spurious key position changes.

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