net.sf.farrago.fennel.rel
Class FennelSingleRel

java.lang.Object
  org.eigenbase.rel.AbstractRelNode
      org.eigenbase.rel.SingleRel
          net.sf.farrago.fennel.rel.FennelSingleRel

All Implemented Interfaces:

Cloneable, FennelRel, RelNode

Direct Known Subclasses:

FennelBernoulliSamplingRel, FennelBufferRel, FennelCalcRel, FennelIdxWriteRel, FennelOptionalRel, FennelPullCollectRel, FennelPullUncollectRel, FennelRenameRel, FennelReshapeRel, FennelSortRel, FennelTempIdxSearchRel, FennelWindowRel, FtrsIndexBuilderRel, FtrsIndexSearchRel, LcsIndexBuilderRel, LcsIndexMergeRel, LcsNormalizerRel

public abstract class FennelSingleRel
extends SingleRel
implements FennelRel

FennelSingleRel is a FennelRel corresponding to SingleRel, and which only takes a FennelRel as input.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/fennel/rel/FennelSingleRel.java#1 $

Author:

John V. Sichi

Field Summary

Fields inherited from class org.eigenbase.rel.AbstractRelNode

digest, id, rowType, traits

Fields inherited from interface net.sf.farrago.query.FennelRel

FENNEL_EXEC_CONVENTION

Fields inherited from interface org.eigenbase.rel.RelNode

emptyArray

Constructor Summary

protected	FennelSingleRel(RelOptCluster cluster, RelNode child) Creates a new FennelSingleRel object.
protected	FennelSingleRel(RelOptCluster cluster, RelTraitSet traits, RelNode child) Creates a new FennelSingleRel object with specific traits.

Method Summary

RelFieldCollation[]	getCollations() TODO: jhyde, 2006/3/28: unify with RelNode.getCollationList()
FarragoTypeFactory	getFarragoTypeFactory()
private FennelRel	getFennelInput() NOTE: this method is intentionally private because interactions between FennelRels must be mediated by FarragoRelImplementor.
Object	implementFennelChild(FennelRelImplementor implementor) Visits this relational expression as part of the implementation process.

Methods inherited from class org.eigenbase.rel.SingleRel

childrenAccept, deriveRowType, explain, getChild, getInputs, getRows, replaceInput

Methods inherited from class org.eigenbase.rel.AbstractRelNode

clone, 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 net.sf.farrago.query.FennelRel

toStreamDef

Methods inherited from interface org.eigenbase.rel.RelNode

childrenAccept, clone, 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

Constructor Detail

FennelSingleRel

protected FennelSingleRel(RelOptCluster cluster,
                          RelNode child)

Creates a new FennelSingleRel object.

Parameters:

cluster - RelOptCluster for this rel

child - input rel

FennelSingleRel

protected FennelSingleRel(RelOptCluster cluster,
                          RelTraitSet traits,
                          RelNode child)

Creates a new FennelSingleRel object with specific traits.

Parameters:

cluster - RelOptCluster for this rel

traits - traits for this rel

child - input rel

Method Detail

getFarragoTypeFactory

public FarragoTypeFactory getFarragoTypeFactory()

getFennelInput

private FennelRel getFennelInput()

NOTE: this method is intentionally private because interactions between FennelRels must be mediated by FarragoRelImplementor.

Returns:

this rel's input, which must already have been converted to a FennelRel

getCollations

public RelFieldCollation[] getCollations()

Description copied from interface: FennelRel

TODO: jhyde, 2006/3/28: unify with RelNode.getCollationList()

Specified by:

getCollations in interface FennelRel

Returns:

the sort order produced by this FennelRel, or an empty array if the output is not guaranteed to be in any particular order.

implementFennelChild

public Object implementFennelChild(FennelRelImplementor implementor)

Description copied from interface: FennelRel

Visits this relational expression as part of the implementation process. Fennel relational expressions are implemented in a two-phase process: first call this method, then call FennelRel.toStreamDef(net.sf.farrago.query.FennelRelImplementor).

Specified by:

implementFennelChild in interface FennelRel