Package org.apache.calcite.rel.rules
Class SemiJoinRule
- java.lang.Object
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- org.apache.calcite.plan.RelOptRule
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- org.apache.calcite.rel.rules.SemiJoinRule
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- Direct Known Subclasses:
SemiJoinRule.JoinToSemiJoinRule
,SemiJoinRule.ProjectToSemiJoinRule
public abstract class SemiJoinRule extends RelOptRule
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
SemiJoinRule.JoinToSemiJoinRule
SemiJoinRule that matches a Join with an empty Aggregate as its right child.static class
SemiJoinRule.ProjectToSemiJoinRule
SemiJoinRule that matches a Project on top of a Join with an Aggregate as its right child.
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Field Summary
Fields Modifier and Type Field Description private static java.util.function.Predicate<Aggregate>
IS_EMPTY_AGGREGATE
private static java.util.function.Predicate<Join>
IS_LEFT_OR_INNER
static SemiJoinRule
JOIN
static SemiJoinRule
PROJECT
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Fields inherited from class org.apache.calcite.plan.RelOptRule
description, operands, relBuilderFactory
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Constructor Summary
Constructors Modifier Constructor Description protected
SemiJoinRule(java.lang.Class<Join> joinClass, java.lang.Class<Aggregate> aggregateClass, RelBuilderFactory relBuilderFactory, java.lang.String description)
protected
SemiJoinRule(java.lang.Class<Project> projectClass, java.lang.Class<Join> joinClass, java.lang.Class<Aggregate> aggregateClass, RelBuilderFactory relBuilderFactory, java.lang.String description)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
onMatch(RelOptRuleCall call)
Receives notification about a rule match.protected void
perform(RelOptRuleCall call, Project project, Join join, RelNode left, Aggregate aggregate)
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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
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Field Detail
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IS_LEFT_OR_INNER
private static final java.util.function.Predicate<Join> IS_LEFT_OR_INNER
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IS_EMPTY_AGGREGATE
private static final java.util.function.Predicate<Aggregate> IS_EMPTY_AGGREGATE
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PROJECT
public static final SemiJoinRule PROJECT
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JOIN
public static final SemiJoinRule JOIN
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Constructor Detail
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SemiJoinRule
protected SemiJoinRule(java.lang.Class<Project> projectClass, java.lang.Class<Join> joinClass, java.lang.Class<Aggregate> aggregateClass, RelBuilderFactory relBuilderFactory, java.lang.String description)
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SemiJoinRule
protected SemiJoinRule(java.lang.Class<Join> joinClass, java.lang.Class<Aggregate> aggregateClass, RelBuilderFactory relBuilderFactory, java.lang.String description)
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Method Detail
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perform
protected void perform(RelOptRuleCall call, Project project, Join join, RelNode left, Aggregate aggregate)
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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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