org.apache.calcite.rel.rules

Class SemiJoinJoinTransposeRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.plan.RelRule<SemiJoinJoinTransposeRule.Config>

org.apache.calcite.rel.rules.SemiJoinJoinTransposeRule

All Implemented Interfaces:

TransformationRule

@Value.Enclosing
public class SemiJoinJoinTransposeRule
extends RelRule<SemiJoinJoinTransposeRule.Config>
implements TransformationRule

Planner rule that pushes a semi-join down in a tree past a Join in order to trigger other rules that will convert SemiJoins.

• SemiJoin(LogicalJoin(X, Y), Z) → LogicalJoin(SemiJoin(X, Z), Y)
• SemiJoin(LogicalJoin(X, Y), Z) → LogicalJoin(X, SemiJoin(Y, Z))

Whether this first or second conversion is applied depends on which operands actually participate in the semi-join.

See Also:

CoreRules.SEMI_JOIN_JOIN_TRANSPOSE

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	SemiJoinJoinTransposeRule.Config Rule configuration.

Nested classes/interfaces inherited from class org.apache.calcite.plan.RelRule

RelRule.Done, RelRule.MatchHandler<R extends RelOptRule>, RelRule.OperandBuilder, RelRule.OperandDetailBuilder<R extends RelNode>, RelRule.OperandTransform

Nested classes/interfaces inherited from class org.apache.calcite.plan.RelOptRule

RelOptRule.ConverterRelOptRuleOperand

Field Summary

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

config

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

description, operands, relBuilderFactory

Constructor Summary

Constructors

Modifier	Constructor and Description
	SemiJoinJoinTransposeRule(RelBuilderFactory relBuilderFactory) Deprecated.
protected	SemiJoinJoinTransposeRule(SemiJoinJoinTransposeRule.Config config) Creates a SemiJoinJoinTransposeRule.

Method Summary

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

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

SemiJoinJoinTransposeRule

protected SemiJoinJoinTransposeRule(SemiJoinJoinTransposeRule.Config config)

Creates a SemiJoinJoinTransposeRule.

SemiJoinJoinTransposeRule

@Deprecated
public SemiJoinJoinTransposeRule(RelBuilderFactory relBuilderFactory)

Deprecated.

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>, org.apache.calcite.plan.RelHintsPropagator) to register the expression.

Specified by:

onMatch in class RelOptRule

Parameters:

call - Rule call

See Also:

RelOptRule.matches(RelOptRuleCall)