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Change optimizer_use_mrr=auto|disable|force

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to be optimizer_switch flags mrr=on|off and mrr_cost_based=on|off.
This commit is contained in:
Sergey Petrunya
2011-06-03 00:25:58 +04:00
parent c44c1bd188
commit 9482e387e6
14 changed files with 64 additions and 72 deletions
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8
sql/sql_class.h
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@@ -408,14 +408,6 @@ struct system_variables
ulong optimizer_search_depth;
/* A bitmap for switching optimizations on/off */
ulong optimizer_switch;
/*
Controls use of Engine-MRR:
0 - auto, based on cost
1 - force MRR when the storage engine is capable of doing it
2 - disable MRR.
*/
ulong optimizer_use_mrr;
ulong preload_buff_size;
ulong profiling_history_size;
ulong query_cache_type;