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More code cleanups

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Remove Histogram_*::is_available(), it is not applicable anymore.
Fix compilation on Windows
This commit is contained in:
Sergei Petrunia
2021-09-04 17:24:47 +03:00
parent 1d98168547
commit 9271bd17f7
4 changed files with 11 additions and 26 deletions
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23
sql/sql_statistics.h
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@ -175,9 +175,15 @@ public:
virtual Histogram_builder *create_builder(Field *col, uint col_len,
ha_rows rows)=0;
virtual bool is_available()=0;
/*
This function checks that histograms should be usable only when
1) the level of optimizer_use_condition_selectivity > 3
*/
bool is_usable(THD *thd)
{
return thd->variables.optimizer_use_condition_selectivity > 3;
}
virtual bool is_usable(THD *thd)=0;
virtual double point_selectivity(Field *field, key_range *endpoint,
double avg_selection)=0;
@ -312,19 +318,6 @@ public:
Histogram_builder *create_builder(Field *col, uint col_len,
ha_rows rows) override;
bool is_available() override { return (values!=NULL); }
/*
This function checks that histograms should be usable only when
1) the level of optimizer_use_condition_selectivity > 3
2) histograms have been collected
*/
bool is_usable(THD *thd) override
{
return thd->variables.optimizer_use_condition_selectivity > 3 &&
is_available();
}
void set_value(uint i, double val)
{
switch (type) {