Edson Carlos Ericksson Richter wrote:
Unfortunately, for developers, TBDITW don't allow change column names, datatypes, nullability, etc...
If you haven't already, please make sure you vote for DERBY-396. Already high on the list.
http://issues.apache.org/jira/browse/DERBY?report=com.atlassian.jira.plugin.system.project:popularissues-panel
