* Check in MySQL parser to avoid trying to parse a table defined twice in the same
file as indices (and probably other things) get messed up
* Workaround for some MySQL quirks on primary key definitions
+* Fix dropping primary keys in MySQL diffs (RT#62250, patch from Nick Bertrand)
* MySQL producer does not attempt to write out non-existent unique constraint names
* MySQL parser correctly differentiates between signed and unsigned integer column
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