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From "Brett Sutton (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-4693) column rename looses 'identity' attribute.
Date Sat, 05 Jun 2010 11:37:53 GMT
column rename looses 'identity' attribute.

                 Key: DERBY-4693
                 URL: https://issues.apache.org/jira/browse/DERBY-4693
             Project: Derby
          Issue Type: Bug
          Components: SQL
    Affects Versions:
         Environment: ubuntu, java 1.5
            Reporter: Brett Sutton
            Priority: Minor
             Fix For:

renaming an identity column causes the column to loose its 'identity' attribute.

you can reproduce the problem as follows:

CREATE TABLE njr_version ( id INTEGER generated always as identity, databaseVersion INTEGER);

insert into njr_version (databaseVersion) values (10);
-- column inserted successfully.
rename column njr_version.id to idVersion;

insert into njr_version (databaseVersion) values (10);
Error: Column 'IDVERSION'  cannot accept a NULL value.

To compound this problem there is no way to restore the renamed columns identity attribute
as the alter command doesn't let you set an identity attribute. The only work around is to
create a new table and copy the data across.

			"			(\n" + //$NON-NLS-1$
			"			   IDVERSION INTEGER generated always as identity,\n" +//$NON-NLS-1$ 
			"			);

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