public final class UpdateFieldOperation extends LogicalPageOperation
Format ID | LOGOP_UPDATE_FIELD the formatId is written by FormatIdOutputStream when this object is written out by writeObject |
Purpose | update a field of a record on the page |
Upgrade | |
Disk Layout | LogicalPageOperation the super class doMeSlot(CompressedInt) the slot of the record being updated fieldId(CompressedInt) the recordId of the record being updated OptionalData The after image of the column (length included), follow by the old image of the record (length included). If this is logically undoable, then the before image of the entire row is logged |
Modifier and Type | Field and Description |
---|---|
protected int |
doMeSlot |
protected int |
fieldId |
protected ByteArray |
preparedLog |
recordId, undo
containerHdl, foundHere, page
ABORT, BI_LOG, CHECKSUM, COMMIT, COMPENSATION, FILE_RESOURCE, FIRST, LAST, PREPARE, RAWSTORE, XA_NEEDLOCK
Constructor and Description |
---|
UpdateFieldOperation() |
UpdateFieldOperation(RawTransaction t,
BasePage page,
int slot,
int recordId,
int fieldId,
java.lang.Object column,
LogicalUndo undo) |
Modifier and Type | Method and Description |
---|---|
void |
doMe(Transaction xact,
LogInstant instant,
LimitObjectInput in)
Change the value of a field.
|
ByteArray |
getPreparedLog()
the default for optional data is set to null.
|
int |
getTypeFormatId()
Return my format identifier.
|
void |
readExternal(java.io.ObjectInput in)
Read this in
|
void |
restoreLoggedRow(java.lang.Object[] row,
LimitObjectInput in)
Restore the row stored in the optional data of the log record.
|
void |
restoreMe(Transaction xact,
BasePage undoPage,
LogInstant CLRInstant,
LimitObjectInput in)
restore the before image of the page
|
java.lang.String |
toString()
DEBUG: Print self.
|
void |
undoMe(Transaction xact,
BasePage undoPage,
int undoRecordId,
LogInstant CLRInstant,
LimitObjectInput in)
Restore field to its old value.
|
void |
writeExternal(java.io.ObjectOutput out) |
private void |
writeOptionalDataToBuffer(RawTransaction t,
java.lang.Object column)
Write the old column value and and new column value as optional data.
|
generateUndo, getContainer, getRecordHandle, reclaimPrepareLocks, resetRecordHandle
findpage, getPage, getPageForRedoRecovery, getPageId, getPageVersion, group, needsRedo, releaseResource, resetPageNumber
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
group, needsRedo, releaseResource
protected int doMeSlot
protected int fieldId
protected transient ByteArray preparedLog
UpdateFieldOperation(RawTransaction t, BasePage page, int slot, int recordId, int fieldId, java.lang.Object column, LogicalUndo undo) throws StandardException
StandardException
public UpdateFieldOperation()
public void writeExternal(java.io.ObjectOutput out) throws java.io.IOException
writeExternal
in interface java.io.Externalizable
writeExternal
in class LogicalPageOperation
java.io.IOException
public void readExternal(java.io.ObjectInput in) throws java.io.IOException, java.lang.ClassNotFoundException
readExternal
in interface java.io.Externalizable
readExternal
in class LogicalPageOperation
java.io.IOException
- error reading from log streamjava.lang.ClassNotFoundException
- log stream corruptedpublic int getTypeFormatId()
public void doMe(Transaction xact, LogInstant instant, LimitObjectInput in) throws StandardException, java.io.IOException
xact
- the Transactioninstant
- the log instant of this operationin
- optional datajava.io.IOException
- Can be thrown by any of the methods of ObjectInput.StandardException
- Standard Derby policy.Loggable.doMe(org.apache.derby.iapi.store.raw.Transaction, org.apache.derby.iapi.store.raw.log.LogInstant, org.apache.derby.iapi.services.io.LimitObjectInput)
public void undoMe(Transaction xact, BasePage undoPage, int undoRecordId, LogInstant CLRInstant, LimitObjectInput in) throws StandardException, java.io.IOException
undoMe
in class LogicalPageOperation
xact
- the Transaction doing the rollbackundoPage
- the page to rollback changes onundoRecordId
- the recordId to rollback changes onCLRInstant
- the log instant of this (PageUndo) operationin
- optional data for the rollback operationjava.io.IOException
- Can be thrown by any of the methods of ObjectInput.StandardException
- Standard Derby policy.LogicalPageOperation.undoMe(org.apache.derby.iapi.store.raw.Transaction, org.apache.derby.impl.store.raw.data.BasePage, int, org.apache.derby.iapi.store.raw.log.LogInstant, org.apache.derby.iapi.services.io.LimitObjectInput)
public void restoreLoggedRow(java.lang.Object[] row, LimitObjectInput in) throws StandardException, java.io.IOException
row
- an IN/OUT parameter, caller passed in the row with
the correct column number and type, the log operation will restore the
row with the optional data stored in the log record.java.io.IOException
- error reading from log streamStandardException
- Standard Derby error policyLogicalUndo
public void restoreMe(Transaction xact, BasePage undoPage, LogInstant CLRInstant, LimitObjectInput in) throws StandardException, java.io.IOException
restoreMe
in class PageBasicOperation
xact
- the Transaction doing the rollbackundoPage
- the page to rollback changes onCLRInstant
- the log instant of this (PageUndo) operationin
- optional data for the rollback operationStandardException
- Standard Derby Error Policyjava.io.IOException
- problem reading the complete log record from the
input streampublic ByteArray getPreparedLog()
PageBasicOperation
getPreparedLog
in interface Loggable
getPreparedLog
in class PageBasicOperation
private void writeOptionalDataToBuffer(RawTransaction t, java.lang.Object column) throws StandardException, java.io.IOException
java.io.IOException
- Can be thrown by any of the methods of ObjectOutput.StandardException
- Standard Derby policy.public java.lang.String toString()
toString
in class PageBasicOperation
Apache Derby V10.13 Internals - Copyright © 2004,2016 The Apache Software Foundation. All Rights Reserved.