DERBY-532 Support deferrable constraints Patch derby-532-fix-drop-not-nullable. Fixes a broken predicate when recreating the index when going from UNIQUE NOT NULL to plain UNIQUE: the existing predicate missed the deferrable case, so the index was not recreated. Added a test case.
db/derby/code/trunk/java/engine/org/apache/derby/impl/sql/execute/AlterTableConstantAction.java