MySQL 9.0.0
Source Code Documentation
|
Go to the source code of this file.
Functions | |
double | EstimateSelectivity (THD *thd, Item *condition, const CompanionSet &companion_set) |
For the given condition, to try estimate its filtering selectivity, on a 0..1 scale (where 1.0 lets all records through). More... | |
double EstimateSelectivity | ( | THD * | thd, |
Item * | condition, | ||
const CompanionSet & | companion_set | ||
) |
For the given condition, to try estimate its filtering selectivity, on a 0..1 scale (where 1.0 lets all records through).