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From Sondre Eikanger Kvalø (JIRA) <j...@apache.org>
Subject [jira] Commented: (DDLUTILS-250) The DB2Builder makes column names to short
Date Fri, 26 Jun 2009 13:51:07 GMT

    [ https://issues.apache.org/jira/browse/DDLUTILS-250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12724546#action_12724546

Sondre Eikanger Kvalø commented on DDLUTILS-250:

A workaround is to invoke PlatformFactory.registerPlatform(Db2Platform.DATABASENAME, Db2v8Platform.class);
prior to calling PlatformFactory.createNewPlatformInstance(DataSource). You will then get
a Db2v8Platform object instead of a Db2Platform object (maxColumnNameLength will then be 18

> The DB2Builder makes column names to short
> ------------------------------------------
>                 Key: DDLUTILS-250
>                 URL: https://issues.apache.org/jira/browse/DDLUTILS-250
>             Project: DdlUtils
>          Issue Type: Bug
>          Components: Core - DB2
>    Affects Versions: 1.0
>         Environment: Windows, DB2 9.5
>            Reporter: Sondre Eikanger Kvalø
>            Assignee: Thomas Dudziak
> The DB2Platform class restricts column names to 18 characters (or 30 for Db2v8Platform),
which is fine for legacy DB2.  These days DB/2 supports column names with up to 128 bytes
(DB2 9.7) . 
> Since DB2 9.X will use DB2Platform (and not Db2v8Platform) the maxColumnNameLength will
be set to 18 for DB2 9.X database connections. Because of this the DB2Builder will shorten
column names longer than 18, which in many conditions is to short.
> Possible solutions:
> - autodetect DB2 version and set the "maxColumnNameLength" and property accordingly (the
best fix IMHO as it only affects DB2 implementation) 
> - make it posible to override this setting by either provide a property set to PlatformFactory
(breaks the idea of hiding DBMS specific implementation details to the DDLutils user)

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