org.eigenbase.relopt.volcano
Class VolcanoPlannerTest.TestLeafRel

java.lang.Object
  extended by org.eigenbase.rel.AbstractRelNode
      extended by org.eigenbase.relopt.volcano.VolcanoPlannerTest.TestLeafRel
All Implemented Interfaces:
Cloneable, RelNode
Direct Known Subclasses:
VolcanoPlannerTest.NoneLeafRel, VolcanoPlannerTest.PhysLeafRel
Enclosing class:
VolcanoPlannerTest

private abstract static class VolcanoPlannerTest.TestLeafRel
extends AbstractRelNode


Field Summary
private  String label
           
 
Fields inherited from class org.eigenbase.rel.AbstractRelNode
digest, id, rowType, traits
 
Fields inherited from interface org.eigenbase.rel.RelNode
emptyArray
 
Constructor Summary
protected VolcanoPlannerTest.TestLeafRel(RelOptCluster cluster, RelTraitSet traits, String label)
           
 
Method Summary
 VolcanoPlannerTest.TestLeafRel clone()
          Clones this RelNode.
 RelOptCost computeSelfCost(RelOptPlanner planner)
          Returns the cost of this plan (not including children).
protected  RelDataType deriveRowType()
           
 void explain(RelOptPlanWriter pw)
           
 String getLabel()
           
 
Methods inherited from class org.eigenbase.rel.AbstractRelNode
childrenAccept, cloneTraits, collectVariablesSet, collectVariablesUsed, computeDigest, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getInputs, getOrCreateCorrelVariable, getQuery, getRelTypeName, getRows, getRowType, getTable, getTraits, getVariablesStopped, inheritTraitsFrom, isAccessTo, isDistinct, isValid, onRegister, recomputeDigest, register, registerCorrelVariable, replaceInput, setCorrelVariable, toString
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

label

private String label
Constructor Detail

VolcanoPlannerTest.TestLeafRel

protected VolcanoPlannerTest.TestLeafRel(RelOptCluster cluster,
                                         RelTraitSet traits,
                                         String label)
Method Detail

getLabel

public String getLabel()

clone

public VolcanoPlannerTest.TestLeafRel clone()
Description copied from interface: RelNode
Clones this RelNode.

Traits of the RelNode must be explicitly cloned, using AbstractRelNode.inheritTraitsFrom(AbstractRelNode), as the RelNode may have traits of which it has no knowledge. Example implementation:

     public MyRelNode clone()
     {
         MyRelNode clone = new MyRelNode(...);
         clone.inheritTraitsFrom(this);
         return clone;
     }
 
N.B.: This method must be overridden whenever an existing, concrete RelNode is extended. Otherwise, calling clone() will produce a differently typed RelNode, resulting in invalid or incorrect query plans.

Specified by:
clone in interface RelNode
Specified by:
clone in class AbstractRelNode
Returns:
a clone of this RelNode

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 AbstractRelNode

explain

public void explain(RelOptPlanWriter pw)
Specified by:
explain in interface RelNode
Overrides:
explain in class AbstractRelNode