org.eigenbase.rel
Class TableModificationRelBase

java.lang.Object
  org.eigenbase.rel.AbstractRelNode
      org.eigenbase.rel.SingleRel
          org.eigenbase.rel.TableModificationRelBase

All Implemented Interfaces:

Cloneable, RelNode

Direct Known Subclasses:

MedAbstractFennelTableModRel, TableModificationRel

public abstract class TableModificationRelBase
extends SingleRel

TableModificationRelBase is an abstract base class for implementations of TableModificationRel.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/rel/TableModificationRelBase.java#13 $

Author:

John V. Sichi

Nested Class Summary

static class

TableModificationRelBase.Operation Enumeration of supported modification operations.

Field Summary

protected RelOptConnection	connection The connection to the optimizing session.
private boolean	flattened
private RelDataType	inputRowType
private TableModificationRelBase.Operation	operation
protected RelOptTable	table The table definition.
private List<String>	updateColumnList

Fields inherited from class org.eigenbase.rel.AbstractRelNode

digest, id, nextId, rowType, traits

Fields inherited from interface org.eigenbase.rel.RelNode

emptyArray

Constructor Summary

protected

TableModificationRelBase(RelOptCluster cluster, RelTraitSet traits, RelOptTable table, RelOptConnection connection, RelNode child, TableModificationRelBase.Operation operation, List<String> updateColumnList, boolean flattened)

Method Summary

RelOptCost	computeSelfCost(RelOptPlanner planner) Returns the cost of this plan (not including children).
RelDataType	deriveRowType()
void	explain(RelOptPlanWriter pw)
RelOptConnection	getConnection()
RelDataType	getExpectedInputRowType(int ordinalInParent) Returns the type of the rows expected for an input.
TableModificationRelBase.Operation	getOperation()
RelOptTable	getTable() If this relational expression represents an access to a table, returns that table, otherwise returns null.
List<String>	getUpdateColumnList()
boolean	isDelete()
boolean	isFlattened()
boolean	isInsert()
boolean	isMerge()
boolean	isUpdate()

Methods inherited from class org.eigenbase.rel.SingleRel

childrenAccept, getChild, getInputs, getRows, replaceInput

Methods inherited from class org.eigenbase.rel.AbstractRelNode

clone, 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

Field Detail

connection

protected RelOptConnection connection

The connection to the optimizing session.

table

protected final RelOptTable table

The table definition.

operation

private final TableModificationRelBase.Operation operation

updateColumnList

private final List<String> updateColumnList

inputRowType

private RelDataType inputRowType

flattened

private final boolean flattened

Constructor Detail

TableModificationRelBase

protected TableModificationRelBase(RelOptCluster cluster,
                                   RelTraitSet traits,
                                   RelOptTable table,
                                   RelOptConnection connection,
                                   RelNode child,
                                   TableModificationRelBase.Operation operation,
                                   List<String> updateColumnList,
                                   boolean flattened)

Method Detail

getConnection

public RelOptConnection getConnection()

getTable

public RelOptTable getTable()

Description copied from interface: RelNode

If this relational expression represents an access to a table, returns that table, otherwise returns null.

Specified by:

getTable in interface RelNode

Overrides:

getTable in class AbstractRelNode

getUpdateColumnList

public List<String> getUpdateColumnList()

isFlattened

public boolean isFlattened()

getOperation

public TableModificationRelBase.Operation getOperation()

isInsert

public boolean isInsert()

isUpdate

public boolean isUpdate()

isDelete

public boolean isDelete()

isMerge

public boolean isMerge()

deriveRowType

public RelDataType deriveRowType()

Overrides:

deriveRowType in class SingleRel

getExpectedInputRowType

public RelDataType getExpectedInputRowType(int ordinalInParent)

Description copied from interface: RelNode

Returns the type of the rows expected for an input. Defaults to RelNode.getRowType().

Specified by:

getExpectedInputRowType in interface RelNode

Overrides:

getExpectedInputRowType in class AbstractRelNode

Parameters:

ordinalInParent - input's 0-based ordinal with respect to this parent rel

Returns:

expected row type

explain

public void explain(RelOptPlanWriter pw)

Specified by:

explain in interface RelNode

Overrides:

explain in class SingleRel

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 AbstractRelNode