Package org.apache.calcite.rel.rules

Class JoinAddRedundantSemiJoinRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

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

org.apache.calcite.rel.rules.JoinAddRedundantSemiJoinRule

All Implemented Interfaces:

TransformationRule

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

Rule to add a semi-join into a join. Transformation is as follows:

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

Can be configured to match any sub-class of Join, not just LogicalJoin.

See Also:

• CoreRules.JOIN_ADD_REDUNDANT_SEMI_JOIN

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	JoinAddRedundantSemiJoinRule.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	Description
	JoinAddRedundantSemiJoinRule(Class<? extends Join> clazz, RelBuilderFactory relBuilderFactory)	Deprecated.
protected	JoinAddRedundantSemiJoinRule(JoinAddRedundantSemiJoinRule.Config config)	Creates a JoinAddRedundantSemiJoinRule.

Method Summary

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

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

any, convert, convert, 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 Details

JoinAddRedundantSemiJoinRule

protected JoinAddRedundantSemiJoinRule(JoinAddRedundantSemiJoinRule.Config config)

Creates a JoinAddRedundantSemiJoinRule.

JoinAddRedundantSemiJoinRule

@Deprecated
public JoinAddRedundantSemiJoinRule(Class<? extends Join> clazz,
 RelBuilderFactory relBuilderFactory)

Deprecated.

Method Details

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)