Package org.apache.calcite.rel.rules

Class FilterToCalcRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

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

org.apache.calcite.rel.rules.FilterToCalcRule

All Implemented Interfaces:

TransformationRule

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

Planner rule that converts a LogicalFilter to a LogicalCalc.

The rule does NOT fire if the child is a LogicalFilter or a LogicalProject (we assume that they will be converted using FilterToCalcRule or ProjectToCalcRule) or a LogicalCalc. This LogicalFilter will eventually be converted by FilterCalcMergeRule.

See Also:

• CoreRules.FILTER_TO_CALC

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	FilterToCalcRule.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
protected	FilterToCalcRule(FilterToCalcRule.Config config)	Creates a FilterToCalcRule.
	FilterToCalcRule(RelBuilderFactory relBuilderFactory)	Deprecated.

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

FilterToCalcRule

protected FilterToCalcRule(FilterToCalcRule.Config config)

Creates a FilterToCalcRule.

FilterToCalcRule

@Deprecated
public FilterToCalcRule(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)