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From "Dave Sunerton-Burl (JIRA)" <j...@apache.org>
Subject [jira] Created: (DDLUTILS-164) Unicode datatypes not recognised by databaseToDdl task
Date Thu, 15 Mar 2007 11:03:09 GMT
Unicode datatypes not recognised by databaseToDdl task

                 Key: DDLUTILS-164
                 URL: https://issues.apache.org/jira/browse/DDLUTILS-164
             Project: DdlUtils
          Issue Type: Bug
          Components: Core - Oracle
    Affects Versions: 1.0
         Environment: WinXP
            Reporter: Dave Sunerton-Burl
         Assigned To: Thomas Dudziak

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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