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really annoying bug in mysql 5.0/5.1 optimiser, opened for more than 2 years, and still present in MariaDB



There's a really annoying bug in the mysql optimiser existing for a really long time now, and which has a direct impact on performances :


Since MySQL definitly doesn't seem to want to fix it, I hope MariaDB could do something to help the poor developpers who need to heavily hack there apps with USE INDEX ;)

Note I've tested with mariadb 5.2.1-beta, and the bug is still present.

Thanks a lot !
  Jocelyn Fournier

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