public static class SemiJoinRule.ProjectToSemiJoinRule extends SemiJoinRule
SemiJoinRule.JoinToSemiJoinRule, SemiJoinRule.ProjectToSemiJoinRule
JOIN, PROJECT
description, operands, relBuilderFactory
Constructor and Description |
---|
ProjectToSemiJoinRule(java.lang.Class<Project> projectClass,
java.lang.Class<Join> joinClass,
java.lang.Class<Aggregate> aggregateClass,
RelBuilderFactory relBuilderFactory,
java.lang.String description)
Creates a ProjectToSemiJoinRule.
|
Modifier and Type | Method and Description |
---|---|
void |
onMatch(RelOptRuleCall call)
Receives notification about a rule match.
|
perform
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
public ProjectToSemiJoinRule(java.lang.Class<Project> projectClass, java.lang.Class<Join> joinClass, java.lang.Class<Aggregate> aggregateClass, RelBuilderFactory relBuilderFactory, java.lang.String description)
public void onMatch(RelOptRuleCall call)
RelOptRule
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.
onMatch
in class SemiJoinRule
call
- Rule callRelOptRule.matches(RelOptRuleCall)
Copyright © 2012–2019 The Apache Software Foundation. All rights reserved.