Class RemoveIsNotDistinctFromRule

  extended by org.eigenbase.relopt.RelOptRule
      extended by org.eigenbase.rel.rules.RemoveIsNotDistinctFromRule

public final class RemoveIsNotDistinctFromRule
extends RelOptRule

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

$Id: //open/dev/farrago/src/org/eigenbase/rel/rules/ $
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


public static final RemoveIsNotDistinctFromRule instance
The singleton.

Constructor Detail


private RemoveIsNotDistinctFromRule()
Method Detail


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
call - Rule call
See Also: