DERBY-5736  NullPointerException in GenericTriggerExecutor.executeSPS() caused by OutOfMemoryError

merge revision  1335418 from trunk to 10.8
Contributed by Knut Anders Hatlen



git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.8@1509434 13f79535-47bb-0310-9956-ffa450edef68