Package io.prestosql.cost

Class PlanNodeStatsEstimateMath

java.lang.Object

io.prestosql.cost.PlanNodeStatsEstimateMath

public final class PlanNodeStatsEstimateMath
extends Object

Method Summary

Modifier and Type	Method	Description
static PlanNodeStatsEstimate	addStatsAndCollapseDistinctValues(PlanNodeStatsEstimate left, PlanNodeStatsEstimate right)
static PlanNodeStatsEstimate	addStatsAndMaxDistinctValues(PlanNodeStatsEstimate left, PlanNodeStatsEstimate right)
static PlanNodeStatsEstimate	addStatsAndSumDistinctValues(PlanNodeStatsEstimate left, PlanNodeStatsEstimate right)
static PlanNodeStatsEstimate	capStats(PlanNodeStatsEstimate stats, PlanNodeStatsEstimate cap)
static PlanNodeStatsEstimate	subtractSubsetStats(PlanNodeStatsEstimate superset, PlanNodeStatsEstimate subset)	Subtracts subset stats from supersets stats.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

subtractSubsetStats

public static PlanNodeStatsEstimate subtractSubsetStats(PlanNodeStatsEstimate superset,
                                                        PlanNodeStatsEstimate subset)

Subtracts subset stats from supersets stats. It is assumed that each NDV from subset has a matching NDV in superset.

capStats

public static PlanNodeStatsEstimate capStats(PlanNodeStatsEstimate stats,
                                             PlanNodeStatsEstimate cap)

addStatsAndSumDistinctValues

public static PlanNodeStatsEstimate addStatsAndSumDistinctValues(PlanNodeStatsEstimate left,
                                                                 PlanNodeStatsEstimate right)

addStatsAndMaxDistinctValues

public static PlanNodeStatsEstimate addStatsAndMaxDistinctValues(PlanNodeStatsEstimate left,
                                                                 PlanNodeStatsEstimate right)

addStatsAndCollapseDistinctValues

public static PlanNodeStatsEstimate addStatsAndCollapseDistinctValues(PlanNodeStatsEstimate left,
                                                                      PlanNodeStatsEstimate right)