Package org.apache.calcite.rel.rules
Class MinusToFilterRule
java.lang.Object
org.apache.calcite.plan.RelOptRule
org.apache.calcite.plan.RelRule<MinusToFilterRule.Config>
org.apache.calcite.rel.rules.MinusToFilterRule
- All Implemented Interfaces:
TransformationRule
@Enclosing
public class MinusToFilterRule
extends RelRule<MinusToFilterRule.Config>
implements TransformationRule
Rule that replaces
Minus
operator with Filter
when both inputs are from the same source with only filter conditions differing.
Only inspect a single Filter
layer in the inputs of Minus
.
For inputs with nested Filter
s, apply CoreRules.FILTER_MERGE
as a preprocessing step.
Example transformation:
SELECT mgr, comm FROM emp WHERE mgr = 12 EXCEPT SELECT mgr, comm FROM emp WHERE comm = 5 to SELECT DISTINCT mgr, comm FROM emp WHERE mgr = 12 AND NOT(comm = 5)
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Nested Class Summary
Nested ClassesNested 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
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Field Summary
Fields inherited from class org.apache.calcite.plan.RelOptRule
description, operands, relBuilderFactory
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Constructor Summary
ConstructorsModifierConstructorDescriptionprotected
Deprecated. -
Method Summary
Modifier and TypeMethodDescriptionvoid
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
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Constructor Details
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MinusToFilterRule
Deprecated.This rule is replaced bySetOpToFilterRule
. Please seeCoreRules.MINUS_FILTER_TO_FILTER
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Method Details
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onMatch
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 classRelOptRule
- Parameters:
call
- Rule call- See Also:
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