org.apache.derby.impl.sql.execute
Class UpdateConstantAction

java.lang.Object
  org.apache.derby.impl.sql.execute.WriteCursorConstantAction
      org.apache.derby.impl.sql.execute.UpdateConstantAction

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, Formatable, TypedFormat, ConstantAction

public class UpdateConstantAction
extends WriteCursorConstantAction

This class describes compiled constants that are passed into UpdateResultSets.

See Also:

Serialized Form

Field Summary

(package private) int[]	changedColumnIds This class implements Formatable.
(package private) int	numColumns
private boolean	positionedUpdate

Fields inherited from class org.apache.derby.impl.sql.execute.WriteCursorConstantAction

conglomId, deferred, heapSCOCI, indexCIDS, indexNames, indexSCOCIs, irgs, lockMode, singleRowSource, targetUUID

Constructor Summary

UpdateConstantAction()
Public niladic constructor.

UpdateConstantAction(long conglomId, StaticCompiledOpenConglomInfo heapSCOCI, IndexRowGenerator[] irgs, long[] indexCIDS, StaticCompiledOpenConglomInfo[] indexSCOCIs, java.lang.String[] indexNames, boolean deferred, UUID targetUUID, int lockMode, int[] changedColumnIds, FKInfo[] fkInfo, TriggerInfo triggerInfo, FormatableBitSet baseRowReadList, int[] baseRowReadMap, int[] streamStorableHeapColIds, int numColumns, boolean positionedUpdate, boolean singleRowSource)
Make the ConstantAction for an UPDATE statement.

Method Summary

int	getTypeFormatId() Get the formatID which corresponds to this class.
void	readExternal(java.io.ObjectInput in) Read this object from a stream of stored objects.
void	writeExternal(java.io.ObjectOutput out) Write this object to a stream of stored objects.

Methods inherited from class org.apache.derby.impl.sql.execute.WriteCursorConstantAction

executeConstantAction, getBaseRowReadList, getBaseRowReadMap, getConglomerateId, getFKInfo, getIndexNameFromCID, getIndexNames, getProperty, getStreamStorableHeapColIds, getTargetProperties, getTriggerInfo

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

changedColumnIds

int[] changedColumnIds

This class implements Formatable. But it is NOT used across either major or minor releases. It is only written persistently in stored prepared statements, not in the replication stage. SO, IT IS OK TO CHANGE ITS read/writeExternal.

positionedUpdate

private boolean positionedUpdate

numColumns

int numColumns

Constructor Detail

UpdateConstantAction

public UpdateConstantAction()

Public niladic constructor. Needed for Formatable interface to work.

UpdateConstantAction

public UpdateConstantAction(long conglomId,
                            StaticCompiledOpenConglomInfo heapSCOCI,
                            IndexRowGenerator[] irgs,
                            long[] indexCIDS,
                            StaticCompiledOpenConglomInfo[] indexSCOCIs,
                            java.lang.String[] indexNames,
                            boolean deferred,
                            UUID targetUUID,
                            int lockMode,
                            int[] changedColumnIds,
                            FKInfo[] fkInfo,
                            TriggerInfo triggerInfo,
                            FormatableBitSet baseRowReadList,
                            int[] baseRowReadMap,
                            int[] streamStorableHeapColIds,
                            int numColumns,
                            boolean positionedUpdate,
                            boolean singleRowSource)

Make the ConstantAction for an UPDATE statement.

Parameters:

conglomId - Conglomerate ID.

heapSCOCI - StaticCompiledOpenConglomInfo for heap.

irgs - Index descriptors

indexCIDS - Conglomerate IDs of indices

indexSCOCIs - StaticCompiledOpenConglomInfos for indexes.

indexNames - Names of indices on this table for error reporting.

deferred - True means process as a deferred update.

targetUUID - UUID of target table

lockMode - The lock mode to use (row or table, see TransactionController)

changedColumnIds - Array of ids of changed columns

fkInfo - Array of structures containing foreign key info, if any (may be null)

triggerInfo - Array of structures containing trigger info, if any (may be null)

baseRowReadList - Map of columns read in. 1 based.

baseRowReadMap - BaseRowReadMap[heapColId]->ReadRowColumnId. (0 based)

streamStorableHeapColIds - Null for non rep. (0 based)

numColumns - Number of columns being read.

positionedUpdate - is this a positioned update

singleRowSource - Whether or not source is a single row source

Method Detail

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Description copied from class: WriteCursorConstantAction

Read this object from a stream of stored objects.

Specified by:

readExternal in interface java.io.Externalizable

Overrides:

readExternal in class WriteCursorConstantAction

Parameters:

in - read this.

Throws:

java.io.IOException - thrown on error

java.lang.ClassNotFoundException - thrown on error

See Also:

Externalizable.readExternal(java.io.ObjectInput)

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Description copied from class: WriteCursorConstantAction

Write this object to a stream of stored objects.

Specified by:

writeExternal in interface java.io.Externalizable

Overrides:

writeExternal in class WriteCursorConstantAction

Parameters:

out - write bytes here.

Throws:

java.io.IOException - thrown on error

See Also:

Externalizable.writeExternal(java.io.ObjectOutput)

getTypeFormatId

public int getTypeFormatId()

Get the formatID which corresponds to this class.

Returns:

the formatID of this class