Java Doc for GenericController.java in  » Database-DBMS » db-derby-10.2 » org » apache » derby » impl » store » access » conglomerate » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.impl.store.access.conglomerate 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


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

All known Subclasses:   org.apache.derby.impl.store.access.conglomerate.GenericScanController,  org.apache.derby.impl.store.access.conglomerate.GenericCostController,  org.apache.derby.impl.store.access.conglomerate.GenericConglomerateController,
GenericController
abstract class GenericController (Code)


Field Summary
protected  OpenConglomerateopen_conglom
    


Method Summary
public  voidcheckConsistency()
    
public  voidclose()
    
public  voiddebugConglomerate()
    
public  longgetEstimatedRowCount()
     Get the total estimated number of rows in the container.

The number is a rough estimate and may be grossly off.

public  PropertiesgetInternalTablePropertySet(Properties prop)
    
public  OpenConglomerategetOpenConglom()
    
protected  voidgetRowPositionFromRowLocation(RowLocation row_loc, RowPosition pos)
    
public  SpaceInfogetSpaceInfo()
    
public  voidgetTableProperties(Properties prop)
    
public  voidinit(OpenConglomerate open_conglom)
    
public  booleanisKeyed()
    
public  booleanisTableLocked()
    
public  RowLocationnewRowLocationTemplate()
    
protected  voidqueueDeletePostCommitWork(RowPosition pos)
    
public  voidsetEstimatedRowCount(long count)
     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.


Field Detail
open_conglom
protected OpenConglomerate open_conglom(Code)
Fields of the class





Method Detail
checkConsistency
public void checkConsistency() throws StandardException(Code)
Public Methods implementing ConglomerateController which just delegate to OpenConglomerate:



close
public void close() throws StandardException(Code)



debugConglomerate
public void debugConglomerate() throws StandardException(Code)



getEstimatedRowCount
public long getEstimatedRowCount() throws StandardException(Code)
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. The total estimated number of rows in the conglomerate.
exception:
  StandardException - Standard exception policy.




getInternalTablePropertySet
public Properties getInternalTablePropertySet(Properties prop) throws StandardException(Code)



getOpenConglom
public OpenConglomerate getOpenConglom()(Code)



getRowPositionFromRowLocation
protected void getRowPositionFromRowLocation(RowLocation row_loc, RowPosition pos) throws StandardException(Code)
Private/Protected methods of This class:



getSpaceInfo
public SpaceInfo getSpaceInfo() throws StandardException(Code)



getTableProperties
public void getTableProperties(Properties prop) throws StandardException(Code)



init
public void init(OpenConglomerate open_conglom) throws StandardException(Code)
Public Methods of This class:



isKeyed
public boolean isKeyed()(Code)



isTableLocked
public boolean isTableLocked()(Code)
is the open btree table locked?



newRowLocationTemplate
public RowLocation newRowLocationTemplate() throws StandardException(Code)



queueDeletePostCommitWork
protected void queueDeletePostCommitWork(RowPosition pos) throws StandardException(Code)



setEstimatedRowCount
public void setEstimatedRowCount(long count) throws StandardException(Code)
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.
Parameters:
  count - the estimated number of rows in the container.
exception:
  StandardException - Standard exception policy.




Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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