DB2 fails when data is inserted or deleted from a temp table. This breaks joined and union subclasses, and possibly subclasses with a joined table when using DB2.
Logged Example messages on insert: 02:29:50,084 WARN SqlExceptionHelper:127 - SQL Error: -204, SQLState: 42704 02:29:50,085 ERROR SqlExceptionHelper:129 - DB2 SQL Error: SQLCODE=-204, SQLSTATE=42704, SQLERRMC=SESSION.HT_ZOOLOGY_HUMAN, DRIVER=4.14.137 02:29:50,085 WARN SqlExceptionHelper:127 - SQL Error: -727, SQLState: 56098 02:29:50,085 ERROR SqlExceptionHelper:129 - DB2 SQL Error: SQLCODE=-727, SQLSTATE=56098, SQLERRMC=2;-204;42704;SESSION.HT_ZOOLOGY_HUMAN,
A message sometimes gets logged (depending on jdbc version?) when creating temp table: DB2 SQL Error: SQLCODE=-286, SQLSTATE=42727, SQLERRMC=4096;DBALLO03, DRIVER=4.14.137
This is reproduced by: * org.hibernate.test.annotations.filter.subclass.joined.JoinedSubClassTest
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