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From "Thomas Dudziak (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DDLUTILS-164) Unicode datatypes not recognised by databaseToDdl task
Date Thu, 15 Mar 2007 16:00:53 GMT

     [ https://issues.apache.org/jira/browse/DDLUTILS-164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Thomas Dudziak updated DDLUTILS-164:

    Component/s:     (was: Core - Oracle)
                 Core (No specific database)

> Unicode datatypes not recognised by databaseToDdl task
> ------------------------------------------------------
>                 Key: DDLUTILS-164
>                 URL: https://issues.apache.org/jira/browse/DDLUTILS-164
>             Project: DdlUtils
>          Issue Type: Improvement
>          Components: Core (No specific database)
>    Affects Versions: 1.0
>         Environment: WinXP
>            Reporter: Dave Sunerton-Burl
>         Assigned To: Thomas Dudziak
>             Fix For: 1.1
> If you run the databaseToDdl task against Oracle 9.2 (using the oracle9 identifier),
any unicode columns (e.g. NVARCHAR) come out in the XML as "OTHER". This means that it's impossible
to recreate the database from the XML. Even "search and replace" doesn't work as BLOBs are
read in as "OTHER" too, so there's no way to tell them apart (except manually with the real
database in front of you!).
> This is probably related to DDLUTILS-108. For creating a database from the XML, the most
useful solution would be to allow a flag on the task which allows you to specify whether to
use unicode versions or not. This would be on the *task*, not in the XML file. As discussed
in DDLUTILS-108, databases tend to be set up with one language in mind and you might need
to create schemas in different environments/languages from the same XML, so the XML needs
to be language/unicode neutral. The situation we're in - maintaining a multi-lingual web application
(where translations are in the database) - needs to use unicode columns. It is an all or nothing
situation though - I don't see why you would choose to have some columns unicode (or a specific
language) and not others - so a global setting outside of the XML would be fine.
> For reading the DDL from the database, it's vital that unicode columns are recognised
(i.e. NVARCHAR is recognised as JDBC VARCHAR). This is the important bit. If the columns aren't
recognised to start with, then it's all over for automated database maintenance.

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