net.sf.farrago.namespace.ftrs
Class FtrsTableModificationRel

java.lang.Object
  extended by org.eigenbase.rel.AbstractRelNode
      extended by org.eigenbase.rel.SingleRel
          extended by org.eigenbase.rel.TableModificationRelBase
              extended by net.sf.farrago.namespace.impl.MedAbstractFennelTableModRel
                  extended by net.sf.farrago.namespace.ftrs.FtrsTableModificationRel
All Implemented Interfaces:
Cloneable, FennelRel, RelNode

 class FtrsTableModificationRel
extends MedAbstractFennelTableModRel

FtrsTableModificationRel is the relational expression corresponding to modification of a FTRS table.

Version:
$Id: //open/dev/farrago/src/net/sf/farrago/namespace/ftrs/FtrsTableModificationRel.java#31 $
Author:
John V. Sichi

Nested Class Summary
 
Nested classes/interfaces inherited from class org.eigenbase.rel.TableModificationRelBase
TableModificationRelBase.Operation
 
Field Summary
(package private)  FtrsTable ftrsTable
          Refinement for TableModificationRel.table.
 
Fields inherited from class org.eigenbase.rel.TableModificationRelBase
connection, table
 
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
FtrsTableModificationRel(RelOptCluster cluster, FtrsTable ftrsTable, RelOptConnection connection, RelNode child, TableModificationRelBase.Operation operation, List<String> updateColumnList)
          Creates a new FtrsTableModificationRel object.
 
Method Summary
 FtrsTableModificationRel clone()
          Clones this RelNode.
 RelOptCost computeSelfCost(RelOptPlanner planner)
          Returns the cost of this plan (not including children).
private
<E extends CwmColumn>
List<E>
getUpdateColumnList(Class<E> clazz)
           
 FemExecutionStreamDef toStreamDef(FennelRelImplementor implementor)
          Converts this relational expression to FemExecutionStreamDef form.
 
Methods inherited from class net.sf.farrago.namespace.impl.MedAbstractFennelTableModRel
getCollations, getConnection, getFarragoTypeFactory, implementFennelChild, inputNeedBuffer, inputNeedBuffer, newInputBuffer
 
Methods inherited from class org.eigenbase.rel.TableModificationRelBase
deriveRowType, explain, getExpectedInputRowType, getOperation, getTable, getUpdateColumnList, isDelete, isFlattened, isInsert, isMerge, isUpdate
 
Methods inherited from class org.eigenbase.rel.SingleRel
childrenAccept, getChild, getInputs, getRows, replaceInput
 
Methods inherited from class org.eigenbase.rel.AbstractRelNode
cloneTraits, collectVariablesSet, collectVariablesUsed, computeDigest, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, 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, 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

ftrsTable

final FtrsTable ftrsTable
Refinement for TableModificationRel.table.

Constructor Detail

FtrsTableModificationRel

public FtrsTableModificationRel(RelOptCluster cluster,
                                FtrsTable ftrsTable,
                                RelOptConnection connection,
                                RelNode child,
                                TableModificationRelBase.Operation operation,
                                List<String> updateColumnList)
Creates a new FtrsTableModificationRel object.

Parameters:
cluster - RelOptCluster for this rel
ftrsTable - target table
connection - connection expression
child - child producing rows to be inserted
operation - modification operation to perform
updateColumnList - list of column names to be updated
Method Detail

clone

public FtrsTableModificationRel 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 TableModificationRelBase

getUpdateColumnList

private <E extends CwmColumn> List<E> getUpdateColumnList(Class<E> clazz)

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.

Parameters:
implementor - for generating Java code
Returns:
generated FemExecutionStreamDef