Sergey Petrunya 37e9714c5e MDEV-4840: Wrong result (missing rows) on LEFT JOIN with InnoDB tables ...

Fix two problems in table elimination code:
- Before marking a "value" as bound, check if it is already bound. Marking the 
  same value as bound twice could confuse a module that depends on this value, 
  because Dep_module_XXX use counters to know when they become bound.

- When checking whether field is part of a key, ignore "extended keys" property.

2013-08-22 14:12:10 +04:00

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