MariaDB 5.3 optimizer debugging
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MariaDB 5.3 has an optimizer debugging patch. The patch is pushed into
lp:maria-captains/maria/5.3-optimizer-debugging
The patch adds two variables:
- debug_optimizer_prefer_join_prefix
- debug_optimizer_dupsweedout_penalized
the variables are present as session/global variables, as well as settable from command line.
debug_optimizer_prefer_join_prefix
debug_optimizer_dupsweedout_penalized
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