Package io.prestosql.sql.planner.iterative.rule

Class DetermineSemiJoinDistributionType

java.lang.Object

io.prestosql.sql.planner.iterative.rule.DetermineSemiJoinDistributionType

All Implemented Interfaces:

Rule<SemiJoinNode>

public class DetermineSemiJoinDistributionType
extends Object
implements Rule<SemiJoinNode>

This rule must run after the distribution type has already been set for delete queries, since semi joins in delete queries must be replicated. Once we have better pattern matching, we can fold that optimizer into this one.

Nested Class Summary

Nested classes/interfaces inherited from interface io.prestosql.sql.planner.iterative.Rule

Rule.Context, Rule.Result

Constructor Summary

Constructors

Constructor	Description
DetermineSemiJoinDistributionType(CostComparator costComparator, TaskCountEstimator taskCountEstimator)

Method Summary

Modifier and Type	Method	Description
Rule.Result	apply(SemiJoinNode semiJoinNode, Captures captures, Rule.Context context)
Pattern<SemiJoinNode>	getPattern()	Returns a pattern to which plan nodes this rule applies.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.prestosql.sql.planner.iterative.Rule

isEnabled

Constructor Detail

DetermineSemiJoinDistributionType

public DetermineSemiJoinDistributionType(CostComparator costComparator,
                                         TaskCountEstimator taskCountEstimator)

Method Detail

getPattern

public Pattern<SemiJoinNode> getPattern()

Description copied from interface: Rule

Returns a pattern to which plan nodes this rule applies.

Specified by:

getPattern in interface Rule<SemiJoinNode>

apply

public Rule.Result apply(SemiJoinNode semiJoinNode,
                         Captures captures,
                         Rule.Context context)

Specified by:

apply in interface Rule<SemiJoinNode>