Class GenericController

    • Constructor Detail

      • GenericController

        GenericController()
    • Method Detail

      • checkConsistency

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

        public boolean isKeyed()
      • 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.