org.eigenbase.relopt.volcano
Class VolcanoPlannerTraitTest.TestSingleRel

java.lang.Object
  org.eigenbase.rel.AbstractRelNode
      org.eigenbase.rel.SingleRel
          org.eigenbase.relopt.volcano.VolcanoPlannerTraitTest.TestSingleRel

All Implemented Interfaces:

Cloneable, RelNode

Direct Known Subclasses:

VolcanoPlannerTraitTest.IterSingleRel, VolcanoPlannerTraitTest.NoneSingleRel

Enclosing class:

VolcanoPlannerTraitTest

private abstract static class VolcanoPlannerTraitTest.TestSingleRel
extends SingleRel

Field Summary

Fields inherited from class org.eigenbase.rel.AbstractRelNode

digest, id, rowType, traits

Fields inherited from interface org.eigenbase.rel.RelNode

emptyArray

Constructor Summary

protected

VolcanoPlannerTraitTest.TestSingleRel(RelOptCluster cluster, RelTraitSet traits, RelNode child)

Method Summary

RelOptCost	computeSelfCost(RelOptPlanner planner) Returns the cost of this plan (not including children).
protected RelDataType	deriveRowType()

Methods inherited from class org.eigenbase.rel.SingleRel

childrenAccept, explain, getChild, getInputs, getRows, replaceInput

Methods inherited from class org.eigenbase.rel.AbstractRelNode

clone, cloneTraits, collectVariablesSet, collectVariablesUsed, computeDigest, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getOrCreateCorrelVariable, getQuery, getRelTypeName, getRowType, getTable, getTraits, getVariablesStopped, inheritTraitsFrom, isAccessTo, isDistinct, isValid, onRegister, recomputeDigest, register, registerCorrelVariable, setCorrelVariable, toString

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

VolcanoPlannerTraitTest.TestSingleRel

protected VolcanoPlannerTraitTest.TestSingleRel(RelOptCluster cluster,
                                                RelTraitSet traits,
                                                RelNode child)

Method Detail

computeSelfCost

public RelOptCost computeSelfCost(RelOptPlanner planner)

Description copied from interface: RelNode

Returns the cost of this plan (not including children). The base implementation throws an error; derived classes should override.

NOTE jvs 29-Mar-2006: Don't call this method directly. Instead, use RelMetadataQuery.getNonCumulativeCost(org.eigenbase.rel.RelNode), which gives plugins a chance to override the rel's default ideas about cost.

Specified by:

computeSelfCost in interface RelNode

Overrides:

computeSelfCost in class AbstractRelNode

deriveRowType

protected RelDataType deriveRowType()

Overrides:

deriveRowType in class SingleRel