Package org.apache.calcite.rel.rules

Class SemiJoinRule.ProjectToSemiJoinRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.rel.rules.SemiJoinRule

org.apache.calcite.rel.rules.SemiJoinRule.ProjectToSemiJoinRule

Enclosing class:

SemiJoinRule

public static class SemiJoinRule.ProjectToSemiJoinRule
extends SemiJoinRule

SemiJoinRule that matches a Project on top of a Join with an Aggregate as its right child.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.calcite.rel.rules.SemiJoinRule

SemiJoinRule.JoinToSemiJoinRule, SemiJoinRule.ProjectToSemiJoinRule

Field Summary

Fields inherited from class org.apache.calcite.rel.rules.SemiJoinRule

JOIN, PROJECT

Fields inherited from class org.apache.calcite.plan.RelOptRule

description, operands, relBuilderFactory

Constructor Summary

Constructors

Constructor	Description
ProjectToSemiJoinRule(java.lang.Class<Project> projectClass, java.lang.Class<Join> joinClass, java.lang.Class<Aggregate> aggregateClass, RelBuilderFactory relBuilderFactory, java.lang.String description)	Creates a ProjectToSemiJoinRule.

Method Summary

Modifier and Type	Method	Description
void	onMatch(RelOptRuleCall call)	Receives notification about a rule match.

Methods inherited from class org.apache.calcite.rel.rules.SemiJoinRule

perform

Methods inherited from class org.apache.calcite.plan.RelOptRule

any, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, matches, none, operand, operand, operand, operand, operand, operandJ, operandJ, some, toString, unordered

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ProjectToSemiJoinRule

public ProjectToSemiJoinRule(java.lang.Class<Project> projectClass,
                             java.lang.Class<Join> joinClass,
                             java.lang.Class<Aggregate> aggregateClass,
                             RelBuilderFactory relBuilderFactory,
                             java.lang.String description)

Creates a ProjectToSemiJoinRule.

Method Detail

onMatch

public void onMatch(RelOptRuleCall call)

Description copied from class: RelOptRule

Receives notification about a rule match. At the time that this method is called, call.rels holds the set of relational expressions which match the operands to the rule; call.rels[0] is the root expression.

Typically a rule would check that the nodes are valid matches, creates a new expression, then calls back RelOptRuleCall.transformTo(org.apache.calcite.rel.RelNode, java.util.Map<org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode>) to register the expression.

Overrides:

onMatch in class SemiJoinRule

Parameters:

call - Rule call

See Also:

RelOptRule.matches(RelOptRuleCall)