org.apache.derby.impl.store.access
Class BackingStoreHashTableFromScan

java.lang.Object
  org.apache.derby.iapi.store.access.BackingStoreHashtable
      org.apache.derby.impl.store.access.BackingStoreHashTableFromScan

 class BackingStoreHashTableFromScan
extends BackingStoreHashtable

Extend BackingStoreHashtable with the ability to maintain the underlying openScan() until the hashtable has been closed. This is necessary for long row access. Access to long row delays actual objectification until the columns are accessed, but depends on the underlying table to be still open when the column is accessed.

Transactions are obtained from an AccessFactory.

See Also:

BackingStoreHashtable

Field Summary

private ScanManager

open_scan Fields of the class

Constructor Summary

BackingStoreHashTableFromScan(TransactionController tc, long conglomId, int open_mode, int lock_level, int isolation_level, FormatableBitSet scanColumnList, DataValueDescriptor[] startKeyValue, int startSearchOperator, Qualifier[][] qualifier, DataValueDescriptor[] stopKeyValue, int stopSearchOperator, long max_rowcnt, int[] key_column_numbers, boolean remove_duplicates, long estimated_rowcnt, long max_inmemory_rowcnt, int initialCapacity, float loadFactor, boolean collect_runtimestats, boolean skipNullKeyColumns, boolean keepAfterCommit)
Constructors for This class:

Method Summary

void	close() Close the BackingStoreHashtable.

Methods inherited from class org.apache.derby.iapi.store.access.BackingStoreHashtable

elements, get, getAllRuntimeStats, putRow, remove, setAuxillaryRuntimeStats, size

Methods inherited from class java.lang.Object

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

Field Detail

open_scan

private ScanManager open_scan

Fields of the class

Constructor Detail

BackingStoreHashTableFromScan

public BackingStoreHashTableFromScan(TransactionController tc,
                                     long conglomId,
                                     int open_mode,
                                     int lock_level,
                                     int isolation_level,
                                     FormatableBitSet scanColumnList,
                                     DataValueDescriptor[] startKeyValue,
                                     int startSearchOperator,
                                     Qualifier[][] qualifier,
                                     DataValueDescriptor[] stopKeyValue,
                                     int stopSearchOperator,
                                     long max_rowcnt,
                                     int[] key_column_numbers,
                                     boolean remove_duplicates,
                                     long estimated_rowcnt,
                                     long max_inmemory_rowcnt,
                                     int initialCapacity,
                                     float loadFactor,
                                     boolean collect_runtimestats,
                                     boolean skipNullKeyColumns,
                                     boolean keepAfterCommit)
                              throws StandardException

Constructors for This class:

Throws:

StandardException

Method Detail

close

public void close()
           throws StandardException

Close the BackingStoreHashtable.

Perform any necessary cleanup after finishing with the hashtable. Will deallocate/dereference objects as necessary. If the table has gone to disk this will drop any on disk files used to support the hash table.

Overrides:

close in class BackingStoreHashtable

Throws:

StandardException - Standard exception policy.