net.sf.farrago.namespace.mdr
Class MedMdrClassExtentRel

java.lang.Object
  org.eigenbase.rel.AbstractRelNode
      org.eigenbase.rel.TableAccessRelBase
          net.sf.farrago.namespace.mdr.MedMdrClassExtentRel

All Implemented Interfaces:

Cloneable, JavaRel, RelNode

 class MedMdrClassExtentRel
extends TableAccessRelBase
implements JavaRel

MedMdrClassExtentRel is the relational expression corresponding to a scan over all rows of a MedMdrClassExtent.

TODO: support push-down of projection and filtering

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/namespace/mdr/MedMdrClassExtentRel.java#27 $

Author:

John V. Sichi

Field Summary

(package private) MedMdrClassExtent	mdrClassExtent Refinement for super.table.
(package private) Class<? extends RefObject>	rowClass
(package private) boolean	useReflection

Fields inherited from class org.eigenbase.rel.TableAccessRelBase

connection, table

Fields inherited from class org.eigenbase.rel.AbstractRelNode

digest, id, rowType, traits

Fields inherited from interface org.eigenbase.rel.RelNode

emptyArray

Constructor Summary

MedMdrClassExtentRel(RelOptCluster cluster, MedMdrClassExtent mdrClassExtent, RelOptConnection connection)

Method Summary

MedMdrClassExtentRel	clone() Clones this RelNode.
Expression	getCollectionExpression()
(package private) Expression	getRefBaseObjectRuntimeExpression(RefBaseObject refObject)
(package private) RefBaseObject	getRefObjectFromModelElement(ModelElement modelElement)
private String[]	getRuntimeName(RefBaseObject refObject)
ParseTree	implement(JavaRelImplementor implementor) Creates a plan for this expression according to a calling convention.
(package private) RexNode[]	implementProjection(Expression inputRow)

Methods inherited from class org.eigenbase.rel.TableAccessRelBase

computeSelfCost, deriveRowType, explain, getCollationList, getConnection, getRows, getTable

Methods inherited from class org.eigenbase.rel.AbstractRelNode

childrenAccept, cloneTraits, collectVariablesSet, collectVariablesUsed, computeDigest, getChildExps, getCluster, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getInputs, getOrCreateCorrelVariable, getQuery, getRelTypeName, getRowType, getTraits, getVariablesStopped, inheritTraitsFrom, isAccessTo, isDistinct, isValid, onRegister, recomputeDigest, register, registerCorrelVariable, replaceInput, 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

mdrClassExtent

final MedMdrClassExtent mdrClassExtent

Refinement for super.table.

rowClass

Class<? extends RefObject> rowClass

useReflection

boolean useReflection

Constructor Detail

MedMdrClassExtentRel

public MedMdrClassExtentRel(RelOptCluster cluster,
                            MedMdrClassExtent mdrClassExtent,
                            RelOptConnection connection)

Method Detail

clone

public MedMdrClassExtentRel 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

Overrides:

clone in class TableAccessRelBase

Returns:

a clone of this RelNode

getRuntimeName

private String[] getRuntimeName(RefBaseObject refObject)

getRefObjectFromModelElement

RefBaseObject getRefObjectFromModelElement(ModelElement modelElement)

getRefBaseObjectRuntimeExpression

Expression getRefBaseObjectRuntimeExpression(RefBaseObject refObject)

getCollectionExpression

public Expression getCollectionExpression()

implement

public ParseTree implement(JavaRelImplementor implementor)

Description copied from interface: JavaRel

Creates a plan for this expression according to a calling convention.

Specified by:

implement in interface JavaRel

Parameters:

implementor - implementor

implementProjection

RexNode[] implementProjection(Expression inputRow)