Categorygithub.com/pingcap/tidbpkgplannercorecost
package
9.0.0-alpha+incompatible
Repository: https://github.com/pingcap/tidb.git
Documentation: pkg.go.dev
Versions
2
Dependencies
1
Dependents
6
Files
32 SLOC

# Constants

******************************* Factors *******************************.
SelectionFactor is the default factor of the selectivity.
SmallScanThreshold means: If the actual row count is much more than the limit count, the unordered scan may cost much more than keep order.

# Variables

AggFuncFactor is the basic factor for aggregation.