Package org.apache.calcite.rel.rules
Class CommonRelSubExprRegisterRule
java.lang.Object
org.apache.calcite.plan.RelOptRule
org.apache.calcite.plan.RelRule<CommonRelSubExprRule.Config>
org.apache.calcite.plan.CommonRelSubExprRule
org.apache.calcite.rel.rules.CommonRelSubExprRegisterRule
Rule for saving relational expressions that appear more than once in a query tree to the planner
context.
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Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionstatic interfaceRule 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.OperandTransformNested classes/interfaces inherited from class org.apache.calcite.plan.RelOptRule
RelOptRule.ConverterRelOptRuleOperand -
Field Summary
Fields inherited from class org.apache.calcite.plan.RelOptRule
description, operands, relBuilderFactory -
Method Summary
Modifier and TypeMethodDescriptionvoidonMatch(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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Method Details
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onMatch
Description copied from class:RelOptRuleReceives notification about a rule match. At the time that this method is called,call.relsholds 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:
onMatchin classRelOptRule- Parameters:
call- Rule call- See Also:
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