org.apache.calcite.rel.rules

Class CalcSplitRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

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

org.apache.calcite.rel.rules.CalcSplitRule

All Implemented Interfaces:

TransformationRule

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

Planner rule that converts a Calc to a Project and Filter.

Not enabled by default, as it works against the usual flow, which is to convert Project and Filter to Calc. But useful for specific tasks, such as optimizing before calling an Interpreter.

See Also:

CoreRules.CALC_SPLIT

Nested Class Summary

Nested Classes

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

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

CalcSplitRule

protected CalcSplitRule(CalcSplitRule.Config config)

Creates a CalcSplitRule.

CalcSplitRule

@Deprecated
public CalcSplitRule(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)