Package org.apache.calcite.rel.rules

Class CoerceInputsRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

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

org.apache.calcite.rel.rules.CoerceInputsRule

All Implemented Interfaces:

TransformationRule

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

CoerceInputsRule pre-casts inputs to a particular type. This can be used to assist operator implementations which impose requirements on their input types.

See Also:

• CoreRules.COERCE_INPUTS

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	CoerceInputsRule.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
	CoerceInputsRule(Class<? extends RelNode> consumerRelClass, boolean coerceNames)	Deprecated.
	CoerceInputsRule(Class<? extends RelNode> consumerRelClass, boolean coerceNames, RelBuilderFactory relBuilderFactory)	Deprecated.
protected	CoerceInputsRule(CoerceInputsRule.Config config)	Creates a CoerceInputsRule.

Method Summary

Modifier and Type	Method	Description
@Nullable Convention	getOutConvention()	Returns the convention of the result of firing this rule, null if not known.
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, 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

CoerceInputsRule

protected CoerceInputsRule(CoerceInputsRule.Config config)

Creates a CoerceInputsRule.

CoerceInputsRule

@Deprecated
public CoerceInputsRule(Class<? extends RelNode> consumerRelClass,
 boolean coerceNames)

Deprecated.

CoerceInputsRule

@Deprecated
public CoerceInputsRule(Class<? extends RelNode> consumerRelClass,
 boolean coerceNames,
 RelBuilderFactory relBuilderFactory)

Deprecated.

Method Details

getOutConvention

public @Nullable Convention getOutConvention()

Description copied from class: RelOptRule

Returns the convention of the result of firing this rule, null if not known.

Overrides:

getOutConvention in class RelOptRule

Returns:

Convention of the result of firing this rule, null if not known

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)