Class FtrsTableProjectionRule

  extended by org.eigenbase.relopt.RelOptRule
      extended by net.sf.farrago.namespace.impl.MedAbstractFennelProjectionRule
          extended by net.sf.farrago.namespace.ftrs.FtrsTableProjectionRule

 class FtrsTableProjectionRule
extends MedAbstractFennelProjectionRule

FtrsTableProjectionRule implements the rule for pushing a Projection into a FtrsIndexScanRel.

$Id: //open/dev/farrago/src/net/sf/farrago/namespace/ftrs/ $
John V. Sichi

Nested Class Summary
private static class FtrsTableProjectionRule.IndexLengthComparator
Field Summary
static FtrsTableProjectionRule instance
Fields inherited from class org.eigenbase.relopt.RelOptRule
ANY, description, operands
Constructor Summary
private FtrsTableProjectionRule()
          Creates a FtrsTableProjectionRule.
Method Summary
protected  boolean equalTraitSets(RelTraitSet rts1, RelTraitSet rts2)
 CallingConvention getOutConvention()
          Returns the calling convention of the result of firing this rule, null if not known.
 void onMatch(RelOptRuleCall call)
          Receives notification about a rule match.
private  boolean testIndexCoverage(FtrsIndexGuide indexGuide, FemLocalIndex index, Integer[] projection)
Methods inherited from class net.sf.farrago.namespace.impl.MedAbstractFennelProjectionRule
createNewRelNode, createProjectionList, mapFieldRef, mapProjCol
Methods inherited from class org.eigenbase.relopt.RelOptRule
convert, equals, equals, getOperand, getOperands, 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 FtrsTableProjectionRule instance
Constructor Detail


private FtrsTableProjectionRule()
Creates a FtrsTableProjectionRule.

Method Detail


protected boolean equalTraitSets(RelTraitSet rts1,
                                 RelTraitSet rts2)


public CallingConvention getOutConvention()
Description copied from class: RelOptRule
Returns the calling convention of the result of firing this rule, null if not known.

getOutConvention in class MedAbstractFennelProjectionRule


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 MedAbstractFennelProjectionRule
call - Rule call
See Also:


private boolean testIndexCoverage(FtrsIndexGuide indexGuide,
                                  FemLocalIndex index,
                                  Integer[] projection)