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Added the type of histogram for mwl #253.

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Introduced double precision height-balanced histograms.
This commit is contained in:
Igor Babaev
2013-03-30 18:57:07 -07:00
parent e59e529635
commit 9e1ca1053b
15 changed files with 695 additions and 265 deletions
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sql/sql_class.h
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@ -502,6 +502,7 @@ typedef struct system_variables
ulong optimizer_use_condition_selectivity;
ulong use_stat_tables;
ulong histogram_size;
ulong histogram_type;
ulong preload_buff_size;
ulong profiling_history_size;
ulong read_buff_size;