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From Sondre Eikanger Kvalø (JIRA) <j...@apache.org>
Subject [jira] Updated: (DDLUTILS-250) The DB2Builder makes column names to short
Date Fri, 26 Jun 2009 13:01:10 GMT

     [ https://issues.apache.org/jira/browse/DDLUTILS-250?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sondre Eikanger Kvalø updated DDLUTILS-250:
-------------------------------------------

    Description: 
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 maxColumnNameLength will be 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)

  was:
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 maxColumnNameLength will be 18 for
DB2 9.X database connections.




> 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 maxColumnNameLength will be
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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