net.sf.farrago.namespace.ftrs
Class FtrsTableProjectionRule

java.lang.Object
  org.eigenbase.relopt.RelOptRule
      net.sf.farrago.namespace.impl.MedAbstractFennelProjectionRule
          net.sf.farrago.namespace.ftrs.FtrsTableProjectionRule

 class FtrsTableProjectionRule
extends MedAbstractFennelProjectionRule

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

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/namespace/ftrs/FtrsTableProjectionRule.java#31 $

Author:

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

instance

public static final FtrsTableProjectionRule instance

Constructor Detail

FtrsTableProjectionRule

private FtrsTableProjectionRule()

Creates a FtrsTableProjectionRule.

Method Detail

equalTraitSets

protected boolean equalTraitSets(RelTraitSet rts1,
                                 RelTraitSet rts2)

getOutConvention

public CallingConvention getOutConvention()

Description copied from class: RelOptRule

Returns the calling convention of the result of firing this rule, null if not known.

Overrides:

getOutConvention in class MedAbstractFennelProjectionRule

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 MedAbstractFennelProjectionRule

Parameters:

call - Rule call

See Also:

RelOptRule.matches(RelOptRuleCall)

testIndexCoverage

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