predicatecolumn

Documentation

Index

• func CollectColumnsInExtendedStats(sctx sessionctx.Context, tableID int64) ([]int64, error)
• func GetPredicateColumns(sctx sessionctx.Context, tableID int64) ([]int64, error)
• func LoadColumnStatsUsage(sctx sessionctx.Context, loc *time.Location) (map[model.TableItemID]statstypes.ColStatsTimeInfo, error)
• func LoadColumnStatsUsageForTable(sctx sessionctx.Context, loc *time.Location, tableID int64) (map[model.TableItemID]statstypes.ColStatsTimeInfo, error)
• func SaveColumnStatsUsageForTable(sctx sessionctx.Context, ...) error

Functions

func CollectColumnsInExtendedStats

func CollectColumnsInExtendedStats(sctx sessionctx.Context, tableID int64) ([]int64, error)

CollectColumnsInExtendedStats returns IDs of the columns involved in extended stats.

func GetPredicateColumns

func GetPredicateColumns(sctx sessionctx.Context, tableID int64) ([]int64, error)

GetPredicateColumns returns IDs of predicate columns, which are the columns whose stats are used(needed) when generating query plans.

func LoadColumnStatsUsage

func LoadColumnStatsUsage(sctx sessionctx.Context, loc *time.Location) (map[model.TableItemID]statstypes.ColStatsTimeInfo, error)

LoadColumnStatsUsage loads column stats usage information from disk.

func LoadColumnStatsUsageForTable

func LoadColumnStatsUsageForTable(sctx sessionctx.Context, loc *time.Location, tableID int64) (map[model.TableItemID]statstypes.ColStatsTimeInfo, error)

LoadColumnStatsUsageForTable loads column stats usage information for a specific table from disk.

func SaveColumnStatsUsageForTable

func SaveColumnStatsUsageForTable(
	sctx sessionctx.Context,
	colStatsUsage map[model.TableItemID]statstypes.ColStatsTimeInfo,
) error

SaveColumnStatsUsageForTable saves column stats usage information for a specific table to disk.