Class GenericController
- java.lang.Object
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- org.apache.derby.impl.store.access.conglomerate.GenericController
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- Direct Known Subclasses:
GenericConglomerateController
,GenericCostController
,GenericScanController
abstract class GenericController extends java.lang.Object
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Field Summary
Fields Modifier and Type Field Description protected OpenConglomerate
open_conglom
Fields of the class
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Constructor Summary
Constructors Constructor Description GenericController()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description 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(RowLocation row_loc, RowPosition pos)
Private/Protected methods of This class: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?RowLocation
newRowLocationTemplate()
protected void
queueDeletePostCommitWork(RowPosition pos)
void
setEstimatedRowCount(long count)
Set the total estimated number of rows in the container.
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Field Detail
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open_conglom
protected OpenConglomerate open_conglom
Fields of the class
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Method Detail
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getRowPositionFromRowLocation
protected void getRowPositionFromRowLocation(RowLocation row_loc, RowPosition pos) throws StandardException
Private/Protected methods of This class:- Throws:
StandardException
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queueDeletePostCommitWork
protected void queueDeletePostCommitWork(RowPosition pos) throws StandardException
- Throws:
StandardException
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init
public void init(OpenConglomerate open_conglom) throws StandardException
Public Methods of This class:- Throws:
StandardException
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getOpenConglom
public OpenConglomerate getOpenConglom()
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checkConsistency
public void checkConsistency() throws StandardException
Public Methods implementing ConglomerateController which just delegate to OpenConglomerate:- Throws:
StandardException
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debugConglomerate
public void debugConglomerate() throws StandardException
- Throws:
StandardException
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getTableProperties
public void getTableProperties(java.util.Properties prop) throws StandardException
- Throws:
StandardException
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getInternalTablePropertySet
public java.util.Properties getInternalTablePropertySet(java.util.Properties prop) throws StandardException
- Throws:
StandardException
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getSpaceInfo
public SpaceInfo getSpaceInfo() throws StandardException
- Throws:
StandardException
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close
public void close() throws StandardException
- Throws:
StandardException
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isKeyed
public boolean isKeyed()
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newRowLocationTemplate
public RowLocation newRowLocationTemplate() throws StandardException
- Throws:
StandardException
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isTableLocked
public boolean isTableLocked()
is the open btree table locked?
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getEstimatedRowCount
public long getEstimatedRowCount() throws 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.
- Returns:
- The total estimated number of rows in the conglomerate.
- Throws:
StandardException
- Standard exception policy.
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setEstimatedRowCount
public void setEstimatedRowCount(long count) throws 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.
- Parameters:
count
- the estimated number of rows in the container.- Throws:
StandardException
- Standard exception policy.
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