Package org.apache.calcite.rel.rules

Class ReduceExpressionsRule.ProjectReduceExpressionsRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.plan.RelRule<C>

org.apache.calcite.rel.rules.ReduceExpressionsRule<ReduceExpressionsRule.ProjectReduceExpressionsRule.ProjectReduceExpressionsRuleConfig>

org.apache.calcite.rel.rules.ReduceExpressionsRule.ProjectReduceExpressionsRule

All Implemented Interfaces:

SubstitutionRule, TransformationRule

Enclosing class:

ReduceExpressionsRule<C extends ReduceExpressionsRule.Config>

public static class ReduceExpressionsRule.ProjectReduceExpressionsRule
extends ReduceExpressionsRule<ReduceExpressionsRule.ProjectReduceExpressionsRule.ProjectReduceExpressionsRuleConfig>

Rule that reduces constants inside a Project.

See Also:

• CoreRules.PROJECT_REDUCE_EXPRESSIONS

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	ReduceExpressionsRule.ProjectReduceExpressionsRule.ProjectReduceExpressionsRuleConfig	Rule configuration.

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

ReduceExpressionsRule.CalcReduceExpressionsRule, ReduceExpressionsRule.CaseShuttle, ReduceExpressionsRule.Config, ReduceExpressionsRule.FilterReduceExpressionsRule, ReduceExpressionsRule.JoinReduceExpressionsRule, ReduceExpressionsRule.ProjectReduceExpressionsRule, ReduceExpressionsRule.ReducibleExprLocator, ReduceExpressionsRule.RexReplacer, ReduceExpressionsRule.WindowReduceExpressionsRule

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.rel.rules.ReduceExpressionsRule

EXCLUSION_PATTERN

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
	ProjectReduceExpressionsRule(Class<? extends Project> projectClass, boolean matchNullability, RelBuilderFactory relBuilderFactory)	Deprecated.
	ProjectReduceExpressionsRule(Class<? extends Project> projectClass, RelBuilderFactory relBuilderFactory)	Deprecated.
protected	ProjectReduceExpressionsRule(ReduceExpressionsRule.ProjectReduceExpressionsRule.ProjectReduceExpressionsRuleConfig config)	Creates a ProjectReduceExpressionsRule.

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.ReduceExpressionsRule

findReducibleExps, predicateConstants, pushPredicateIntoCase, reduceExpressions, reduceExpressions, reduceExpressions, reduceExpressionsInternal, substitute

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

Methods inherited from interface org.apache.calcite.rel.rules.SubstitutionRule

autoPruneOld

Constructor Details

ProjectReduceExpressionsRule

protected ProjectReduceExpressionsRule(ReduceExpressionsRule.ProjectReduceExpressionsRule.ProjectReduceExpressionsRuleConfig config)

Creates a ProjectReduceExpressionsRule.

ProjectReduceExpressionsRule

@Deprecated
public ProjectReduceExpressionsRule(Class<? extends Project> projectClass,
 RelBuilderFactory relBuilderFactory)

Deprecated.

ProjectReduceExpressionsRule

@Deprecated
public ProjectReduceExpressionsRule(Class<? extends Project> projectClass,
 boolean matchNullability,
 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)