Sergey Petrunya 6ed00c4d8a MDEV-4465: Reproducible crash (mysqld got signal 11) in multi_delete::initialize_tables... ...

- make multi_delete::initialize_tables() take into account that the JOIN structure may have
  semi-join nests (which are not fully initialized when this function is called, they have 
  tab->table=NULL which caused the crash)
- Also checked multi_update::initialize_tables(): it has a different logic and needed no fixing.

2013-05-03 00:10:43 +04:00

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