Michael Widenius b17a053cc9 MDEV-6129: Server crashes during UNION with ORDER BY field IS NULL ...

Fixed crashing bug for union queries where there was no real tables.


mysql-test/r/group_by.result:
  Added test case
mysql-test/t/group_by.test:
  Added test case
sql/db.opt:
  Removed genrated file
sql/item.cc:
  Handled case when table_list->pos_in_tables is not set. Can only happens when there is no real tables in query

2014-04-24 18:20:57 +03:00

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