Class GenericController

java.lang.Object
org.apache.derby.impl.store.access.conglomerate.GenericController
Direct Known Subclasses:
GenericConglomerateController, GenericCostController, GenericScanController
abstract class GenericController extends Object

  • Field Details

  • Constructor Details

    • GenericController

      GenericController()

  • Method Details

    • getRowPositionFromRowLocation

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

    • queueDeletePostCommitWork

      protected void queueDeletePostCommitWork(RowPosition pos) throws StandardException
      Throws:
      StandardException

    • init

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

    • getOpenConglom

      public OpenConglomerate getOpenConglom()

    • checkConsistency

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

    • debugConglomerate

      public void debugConglomerate() throws StandardException
      Throws:
      StandardException

    • getTableProperties

      public void getTableProperties(Properties prop) throws StandardException
      Throws:
      StandardException

    • getInternalTablePropertySet

      public Properties getInternalTablePropertySet(Properties prop) throws StandardException
      Throws:
      StandardException

    • getSpaceInfo

      public SpaceInfo getSpaceInfo() throws StandardException
      Throws:
      StandardException

    • close

      public void close() throws StandardException
      Throws:
      StandardException

    • isKeyed

      public boolean isKeyed()

    • newRowLocationTemplate

      public RowLocation newRowLocationTemplate() throws StandardException
      Throws:
      StandardException

    • isTableLocked

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

    • 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.

    • 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.