Currently working DERBY issues

Convert altertable.sql into JUNIT
https://issues.apache.org/jira/browse/DERBY-4187
I and Bryan was finished this and these days I my self looking for the code for errors while learning the behavior of DERBY.

ALTER TABLE Sanity ASSERT in add column with autocommit off
https://issues.apache.org/jira/browse/DERBY-4244
I still not actively participated. But I look for it as soon as possible.

Convert checkConstraint.sql into JUNIT
https://issues.apache.org/jira/browse/DERBY-4248
I and Bryan working on this issue these days.

allow alter table to increase the maximum size of a blob and a clob
https://issues.apache.org/jira/browse/DERBY-4256
I still not actively participated. But I look for it as soon as possible.

strange behavior with the "update ... where current of c1" in the CheckConstraintTest
https://issues.apache.org/jira/browse/DERBY-4282
This issue is a bug where Bryan found during the DERBY-4248.