org.eigenbase.rel.rules
Class RemoveIsNotDistinctFromRule

java.lang.Object
  org.eigenbase.relopt.RelOptRule
      org.eigenbase.rel.rules.RemoveIsNotDistinctFromRule

public final class RemoveIsNotDistinctFromRule
extends RelOptRule

Rule to replace isNotDistinctFromOperator with logical equivalent conditions in a FilterRel.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/rel/rules/RemoveIsNotDistinctFromRule.java#1 $

Author:

Rushan Chen

Nested Class Summary

private class

RemoveIsNotDistinctFromRule.RemoveIsNotDistinctFromRexShuttle

Field Summary

static RemoveIsNotDistinctFromRule

instance The singleton.

Fields inherited from class org.eigenbase.relopt.RelOptRule

ANY, description, operands

Constructor Summary

private

RemoveIsNotDistinctFromRule()

Method Summary

void	onMatch(RelOptRuleCall call) Receives notification about a rule match.

Methods inherited from class org.eigenbase.relopt.RelOptRule

convert, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, matches, mergeTraitsAndConvert, mergeTraitsAndConvert, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

instance

public static final RemoveIsNotDistinctFromRule instance

The singleton.

Constructor Detail

RemoveIsNotDistinctFromRule

private RemoveIsNotDistinctFromRule()

Method Detail

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.eigenbase.rel.RelNode) to register the expression.

Specified by:

onMatch in class RelOptRule

Parameters:

call - Rule call

See Also:

RelOptRule.matches(RelOptRuleCall)