com.lucidera.lcs
Class LcsSamplingRowScanRel

java.lang.Object
  extended by org.eigenbase.rel.AbstractRelNode
      extended by net.sf.farrago.fennel.rel.FennelMultipleRel
          extended by com.lucidera.lcs.LcsRowScanRelBase
              extended by com.lucidera.lcs.LcsSamplingRowScanRel
All Implemented Interfaces:
Cloneable, FennelRel, RelNode

public class LcsSamplingRowScanRel
extends LcsRowScanRelBase


Field Summary
(package private)  RelOptSamplingParameters samplingParams
           
 
Fields inherited from class com.lucidera.lcs.LcsRowScanRelBase
clusteredIndexes, connection, inputSelectivity, isFullScan, lcsTable, projectedColumns, residualColumns
 
Fields inherited from class net.sf.farrago.fennel.rel.FennelMultipleRel
inputs
 
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
LcsSamplingRowScanRel(RelOptCluster cluster, RelNode[] children, LcsTable lcsTable, List<FemLocalIndex> clusteredIndexes, RelOptConnection connection, Integer[] projectedColumns, RelOptSamplingParameters samplingParameters)
          Creates a new LcsSamplingRowScanRel object.
 
Method Summary
 LcsSamplingRowScanRel clone()
          Clones this RelNode.
 void explain(RelOptPlanWriter pw)
           
 FemExecutionStreamDef toStreamDef(FennelRelImplementor implementor)
          Converts this relational expression to FemExecutionStreamDef form.
 
Methods inherited from class com.lucidera.lcs.LcsRowScanRelBase
computeCost, computeSelfCost, createScanStream, deriveRowType, explain, getClusteredIndexes, getCollations, getColumnForFieldAccess, getConnection, getIndexGuide, getInputSelectivity, getOriginalColumnOrdinal, getProjectedColumnOrdinal, getProjectedColumns, getRows, getTable, hasResidualFilters, implementFennelChild, isFullScan
 
Methods inherited from class net.sf.farrago.fennel.rel.FennelMultipleRel
getFarragoTypeFactory, getInputs, replaceInput
 
Methods inherited from class org.eigenbase.rel.AbstractRelNode
childrenAccept, cloneTraits, collectVariablesSet, collectVariablesUsed, computeDigest, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getOrCreateCorrelVariable, getQuery, getRelTypeName, getRowType, 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, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getOrCreateCorrelVariable, getQuery, getRelTypeName, getRowType, getTraits, getVariablesStopped, isAccessTo, isDistinct, isValid, onRegister, recomputeDigest, registerCorrelVariable, setCorrelVariable
 

Field Detail

samplingParams

final RelOptSamplingParameters samplingParams
Constructor Detail

LcsSamplingRowScanRel

public LcsSamplingRowScanRel(RelOptCluster cluster,
                             RelNode[] children,
                             LcsTable lcsTable,
                             List<FemLocalIndex> clusteredIndexes,
                             RelOptConnection connection,
                             Integer[] projectedColumns,
                             RelOptSamplingParameters samplingParameters)
Creates a new LcsSamplingRowScanRel object.

Parameters:
cluster - RelOptCluster for this rel
children - children inputs into the row scan
lcsTable - table being scanned
clusteredIndexes - clusters to use for table access
connection - connection
projectedColumns - array of 0-based table-relative column ordinals, or null to project all columns
Method Detail

clone

public LcsSamplingRowScanRel 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

toStreamDef

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.

Specified by:
toStreamDef in interface FennelRel
Overrides:
toStreamDef in class LcsRowScanRelBase
Parameters:
implementor - for generating Java code
Returns:
generated FemExecutionStreamDef

explain

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