Package org.apache.calcite.rel.rules
Class CoerceInputsRule
- java.lang.Object
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- org.apache.calcite.plan.RelOptRule
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- org.apache.calcite.rel.rules.CoerceInputsRule
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public class CoerceInputsRule extends RelOptRule
CoerceInputsRule pre-casts inputs to a particular type. This can be used to assist operator implementations which impose requirements on their input types.
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Field Summary
Fields Modifier and Type Field Description private boolean
coerceNames
private java.lang.Class
consumerRelClass
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Fields inherited from class org.apache.calcite.plan.RelOptRule
description, operands, relBuilderFactory
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Constructor Summary
Constructors Constructor Description CoerceInputsRule(java.lang.Class<? extends RelNode> consumerRelClass, boolean coerceNames)
Deprecated.CoerceInputsRule(java.lang.Class<? extends RelNode> consumerRelClass, boolean coerceNames, RelBuilderFactory relBuilderFactory)
Creates a CoerceInputsRule.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description 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, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutTrait, hashCode, matches, none, operand, operand, operand, operand, operand, operandJ, operandJ, some, toString, unordered
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Constructor Detail
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CoerceInputsRule
@Deprecated public CoerceInputsRule(java.lang.Class<? extends RelNode> consumerRelClass, boolean coerceNames)
Deprecated.
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CoerceInputsRule
public CoerceInputsRule(java.lang.Class<? extends RelNode> consumerRelClass, boolean coerceNames, RelBuilderFactory relBuilderFactory)
Creates a CoerceInputsRule.- Parameters:
consumerRelClass
- Class of RelNode that will consume the inputscoerceNames
- If true, coerce names and types; if false, coerce type onlyrelBuilderFactory
- Builder for relational expressions
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Method Detail
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getOutConvention
public Convention getOutConvention()
Description copied from class:RelOptRule
Returns the convention of the result of firing this rule, null if not known.- Overrides:
getOutConvention
in classRelOptRule
- Returns:
- Convention of the result of firing this rule, null if not known
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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>)
to register the expression.- Specified by:
onMatch
in classRelOptRule
- Parameters:
call
- Rule call- See Also:
RelOptRule.matches(RelOptRuleCall)
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