| java.lang.Object
 org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl
org.apache.derby.impl.sql.execute.NoPutResultSetImpl
org.apache.derby.impl.sql.execute.LastIndexKeyResultSet
| LastIndexKeyResultSet | | class LastIndexKeyResultSet extends NoPutResultSetImpl (Code) | | Return the last key in an index. Used to perform
max().
author:
jamie |
| Constructor Summary | |
| public | LastIndexKeyResultSet(Activation activation, int resultSetNumber, GeneratedMethod resultRowAllocator, long conglomId, String tableName, String userSuppliedOptimizerOverrides, String indexName, int colRefItem, int lockMode, boolean tableLocked, int isolationLevel, double optimizerEstimatedRowCount, double optimizerEstimatedCost)
A last index key result set returns the last row from
the index in question. |
| Method Summary | |
| public void | close()
If the result set has been opened,
close the open scan. | | public ExecRow | getCurrentRow()
This result set has its row from the last fetch done. | | public ExecRow | getNextRowCore()
Return the next row (if any) from the scan (if open). | | public long | getTimeSpent(int type)
Return the total amount of time spent in this ResultSet
Parameters:
type - CURRENT_RESULTSET_ONLY - time spent only in this ResultSetENTIRE_RESULTSET_TREE - time spent in this ResultSet and below. | | public void | openCore()
open a scan on the table. |
| coarserLock | | public boolean coarserLock(Code) | | |
| conglomId | | protected long conglomId(Code) | | |
| isolationLevel | | public int isolationLevel(Code) | | |
| lockMode | | public int lockMode(Code) | | |
| returnedRow | | public boolean returnedRow(Code) | | |
| runTimeStatisticsOn | | protected boolean runTimeStatisticsOn(Code) | | |
| startSearchOperator | | protected int startSearchOperator(Code) | | |
| stopSearchOperator | | protected int stopSearchOperator(Code) | | |
| userSuppliedOptimizerOverrides | | public String userSuppliedOptimizerOverrides(Code) | | |
| LastIndexKeyResultSet | | public LastIndexKeyResultSet(Activation activation, int resultSetNumber, GeneratedMethod resultRowAllocator, long conglomId, String tableName, String userSuppliedOptimizerOverrides, String indexName, int colRefItem, int lockMode, boolean tableLocked, int isolationLevel, double optimizerEstimatedRowCount, double optimizerEstimatedCost) throws StandardException(Code) | | A last index key result set returns the last row from
the index in question. It is used as an ajunct to max().
Parameters:
activation - the activation for this result set,which provides the context for the row allocation operation.
Parameters:
resultSetNumber - The resultSetNumber for the ResultSet
Parameters:
resultRowAllocator - a reference to a method in the activationthat creates a holder for the result row of the scan. Maybe a partial row. ExecRow rowAllocator() throws StandardException;
Parameters:
conglomId - the conglomerate of the table to be scanned.
Parameters:
tableName - The full name of the table
Parameters:
userSuppliedOptimizerOverrides - Overrides specified by the user on the sql
Parameters:
indexName - The name of the index, if one used to access table.
Parameters:
colRefItem - An saved item for a bitSet of columns thatare referenced in the underlying table. -1 ifno item.
Parameters:
lockMode - The lock granularity to use (seeTransactionController in access)
Parameters:
tableLocked - Whether or not the table is marked as using table locking(in sys.systables)
Parameters:
isolationLevel - Isolation level (specified or not) to use on scans
Parameters:
optimizerEstimatedRowCount - Estimated total # of rows byoptimizer
Parameters:
optimizerEstimatedCost - Estimated total cost by optimizer
exception:
StandardException - thrown when unable to create theresult set |
| getTimeSpent | | public long getTimeSpent(int type)(Code) | | Return the total amount of time spent in this ResultSet
Parameters:
type - CURRENT_RESULTSET_ONLY - time spent only in this ResultSetENTIRE_RESULTSET_TREE - time spent in this ResultSet and below. long The total amount of time spent (in milliseconds). |
| openCore | | public void openCore() throws StandardException(Code) | | open a scan on the table. scan parameters are evaluated
at each open, so there is probably some way of altering
their values...
exception:
StandardException - thrown on failure to open |
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