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org.apache.derby.impl.store.access.conglomerate
Class GenericController  

java.lang.Object
  org.apache.derby.impl.store.access.conglomerate.GenericController

Direct Known Subclasses:

GenericConglomerateController, GenericCostController, GenericScanController

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public abstract class GenericController

extends java.lang.Object

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Field Summary
protected  OpenConglomerate	open_conglom           Fields of the class

 

Constructor Summary

GenericController()

 

Method Summary
void	checkConsistency()           Public Methods implementing ConglomerateController which just delegate to OpenConglomerate:
void	close()
void	debugConglomerate()
long	getEstimatedRowCount()           Get the total estimated number of rows in the container.
java.util.Properties	getInternalTablePropertySet(java.util.Properties prop)
OpenConglomerate	getOpenConglom()
protected  void	getRowPositionFromRowLocation(org.apache.derby.iapi.types.RowLocation row_loc, RowPosition pos)           Private/Protected methods of This class:
org.apache.derby.iapi.store.access.SpaceInfo	getSpaceInfo()
void	getTableProperties(java.util.Properties prop)
void	init(OpenConglomerate open_conglom)           Public Methods of This class:
boolean	isKeyed()
boolean	isTableLocked()           is the open btree table locked?
org.apache.derby.iapi.types.RowLocation	newRowLocationTemplate()
protected  void	queueDeletePostCommitWork(RowPosition pos)
void	setEstimatedRowCount(long count)           Set the total estimated number of rows in the container.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

open_conglom

protected OpenConglomerate open_conglom

Fields of the class

Constructor Detail

GenericController

public GenericController()

Method Detail

getRowPositionFromRowLocation

protected void getRowPositionFromRowLocation(org.apache.derby.iapi.types.RowLocation row_loc,
                                             RowPosition pos)
                                      throws org.apache.derby.iapi.error.StandardException

Private/Protected methods of This class:

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queueDeletePostCommitWork

protected void queueDeletePostCommitWork(RowPosition pos)
                                  throws org.apache.derby.iapi.error.StandardException

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init

public void init(OpenConglomerate open_conglom)
          throws org.apache.derby.iapi.error.StandardException

Public Methods of This class:

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getOpenConglom

public OpenConglomerate getOpenConglom()

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checkConsistency

public void checkConsistency()
                      throws org.apache.derby.iapi.error.StandardException

Public Methods implementing ConglomerateController which just delegate to OpenConglomerate:

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debugConglomerate

public void debugConglomerate()
                       throws org.apache.derby.iapi.error.StandardException

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getTableProperties

public void getTableProperties(java.util.Properties prop)
                        throws org.apache.derby.iapi.error.StandardException

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getInternalTablePropertySet

public java.util.Properties getInternalTablePropertySet(java.util.Properties prop)
                                                 throws org.apache.derby.iapi.error.StandardException

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getSpaceInfo

public org.apache.derby.iapi.store.access.SpaceInfo getSpaceInfo()
                                                          throws org.apache.derby.iapi.error.StandardException

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close

public void close()
           throws org.apache.derby.iapi.error.StandardException

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isKeyed

public boolean isKeyed()

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newRowLocationTemplate

public org.apache.derby.iapi.types.RowLocation newRowLocationTemplate()
                                                               throws org.apache.derby.iapi.error.StandardException

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isTableLocked

public boolean isTableLocked()

is the open btree table locked?

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getEstimatedRowCount

public long getEstimatedRowCount()
                          throws org.apache.derby.iapi.error.StandardException

Get the total estimated number of rows in the container.

The number is a rough estimate and may be grossly off. In general the server will cache the row count and then occasionally write the count unlogged to a backing store. If the system happens to shutdown before the store gets a chance to update the row count it may wander from reality.

This call is currently only supported on Heap conglomerates, it will throw an exception if called on btree conglomerates.

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setEstimatedRowCount

public void setEstimatedRowCount(long count)
                          throws org.apache.derby.iapi.error.StandardException

Set the total estimated number of rows in the container.

Often, after a scan, the client of RawStore has a much better estimate of the number of rows in the container than what store has. For instance if we implement some sort of update statistics command, or just after a create index a complete scan will have been done of the table. In this case this interface allows the client to set the estimated row count for the container, and store will use that number for all future references.

This call is currently only supported on Heap conglomerates, it will throw an exception if called on btree conglomerates.

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> impl >> store >> access >> [ conglomerate overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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