Class LcsNormalizerRel

  extended by org.eigenbase.rel.AbstractRelNode
      extended by org.eigenbase.rel.SingleRel
          extended by net.sf.farrago.fennel.rel.FennelSingleRel
              extended by com.lucidera.lcs.LcsNormalizerRel
All Implemented Interfaces:
Cloneable, FennelRel, RelNode

public class LcsNormalizerRel
extends FennelSingleRel

A relation which expands bitmap tuples of the form [keys, bitmaps] into repetitious tuples of the form [keys]. One tuple will be output for each bit set in an input bitmap.

$Id: //open/dev/farrago/src/com/lucidera/lcs/ $
John Pham

Field Summary
private  FarragoRepos repos
Fields inherited from class org.eigenbase.rel.AbstractRelNode
digest, id, rowType, traits
Fields inherited from interface net.sf.farrago.query.FennelRel
Fields inherited from interface org.eigenbase.rel.RelNode
Constructor Summary
LcsNormalizerRel(RelOptCluster cluster, RelNode child)
Method Summary
 LcsNormalizerRel clone()
          Clones this RelNode.
protected  RelDataType deriveRowType()
 FemExecutionStreamDef toStreamDef(FennelRelImplementor implementor)
          Converts this relational expression to FemExecutionStreamDef form.
Methods inherited from class net.sf.farrago.fennel.rel.FennelSingleRel
getCollations, getFarragoTypeFactory, implementFennelChild
Methods inherited from class org.eigenbase.rel.SingleRel
childrenAccept, explain, getChild, getInputs, getRows, replaceInput
Methods inherited from class org.eigenbase.rel.AbstractRelNode
cloneTraits, collectVariablesSet, collectVariablesUsed, computeDigest, computeSelfCost, 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
Methods inherited from interface org.eigenbase.rel.RelNode
childrenAccept, collectVariablesSet, collectVariablesUsed, computeSelfCost, explain, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getInputs, getOrCreateCorrelVariable, getQuery, getRelTypeName, getRows, getRowType, getTable, getTraits, getVariablesStopped, isAccessTo, isDistinct, isValid, onRegister, recomputeDigest, registerCorrelVariable, replaceInput, setCorrelVariable

Field Detail


private final FarragoRepos repos
Constructor Detail


public LcsNormalizerRel(RelOptCluster cluster,
                        RelNode child)
Method Detail


public LcsNormalizerRel 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(...);
         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
a clone of this RelNode


protected RelDataType deriveRowType()
deriveRowType in class SingleRel


public FemExecutionStreamDef toStreamDef(FennelRelImplementor implementor)
Description copied from interface: FennelRel
Converts this relational expression to FemExecutionStreamDef form. In the process, the relational expression will almost certainly call FennelRelImplementor.visitFennelChild(net.sf.farrago.query.FennelRel, int) on each of its children.

implementor - for generating Java code
generated FemExecutionStreamDef