net.sf.farrago.namespace.ftrs
Class FtrsTableModificationRel

java.lang.Object
  org.eigenbase.rel.AbstractRelNode
      org.eigenbase.rel.SingleRel
          org.eigenbase.rel.TableModificationRelBase
              net.sf.farrago.namespace.impl.MedAbstractFennelTableModRel
                  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