Examples of org.apache.derby.iapi.store.access.SortController

Package org.apache.derby.iapi.store.access

Examples of org.apache.derby.iapi.store.access.SortController

org.apache.derby.iapi.store.access.SortController
A sort controller is an interface for inserting rows into a sort.
A sort is created with the createSort method of TransactionController. The rows are read back with a scan controller returned from the openSortScan method of TranscationController. @see TransactionController#openSort @see ScanController


            if (sortControllers != null)
            {
                for (Iterator it = sortControllers.iterator(); it.hasNext(); )
                {
                    SortController sc = (SortController) it.next();
                    str += "open sort controller: " + sc + "\n";
                }
            }


            if (sorts != null)

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      throw StandardException.newException(
                    SQLState.AM_NO_SUCH_SORT, new Long(id));
    }


    // Open it.
    SortController sc = sort.open(this);


    // Keep track of it so we can release on close.
    if (sortControllers == null)
      sortControllers = new ArrayList();
    sortControllers.add(sc);

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            {
                // Loop from the end since the call to close() will remove the
                // element from the list.
                for (int i = sortControllers.size() - 1; i >= 0; i--)
                {
                    SortController sc = (SortController) sortControllers.get(i);
                    sc.completedInserts();
                }
                sortControllers.clear();
            }
        }

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            if (sortControllers != null)
            {
                for (Iterator it = sortControllers.iterator(); it.hasNext(); )
                {
                    SortController sc = (SortController) it.next();
                    str += "open sort controller: " + sc + "\n";
                }
            }


            if (sorts != null)

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      throw StandardException.newException(
                    SQLState.AM_NO_SUCH_SORT, new Long(id));
    }


    // Open it.
    SortController sc = sort.open(this);


    // Keep track of it so we can release on close.
    if (sortControllers == null)
      sortControllers = new ArrayList();
    sortControllers.add(sc);

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   * @return  the sort controller
    */
  private ScanController loadSorter()
    throws StandardException
  {
    SortController       sorter;
    ExecRow         sourceRow;
        ExecIndexRow            sortTemplateRow = getRowTemplate();
    int            inputRowCountEstimate = (int) optimizerEstimatedRowCount;


    TransactionController tc = getTransactionController();


    /*
    ** We have a distinct aggregate so, we'll need
    ** to do a sort.  We use all of the sorting columns and
    ** drop the aggregation on the distinct column.  Then
    ** we'll feed this into the sorter again w/o the distinct
    ** column in the ordering list.
    */
    GenericAggregator[] aggsNoDistinct = getSortAggregators(aggInfoList, true,
        activation.getLanguageConnectionContext(), source);
    SortObserver sortObserver = new AggregateSortObserver(true, aggsNoDistinct, aggregates,
                                sortTemplateRow);


    sortId = tc.createSort((Properties)null, 
          sortTemplateRow.getRowArray(),
          order,
          sortObserver,
          false,      // not in order
          inputRowCountEstimate,        // est rows, -1 means no idea  
          maxRowSize    // est rowsize
          );
    sorter = tc.openSort(sortId);
    dropDistinctAggSort = true;
        
    while ((sourceRow = source.getNextRowCore())!=null) 
    {
      sorter.insert(sourceRow.getRowArray());
      rowsInput++;
    }


    /*
    ** End the sort and open up the result set
    */
    sorter.completedInserts();


    scanController = 
            tc.openSortScan(sortId, activation.getResultSetHoldability());
      
    /*

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   * @return  the sort controller
    */
  private ScanController loadSorter()
    throws StandardException
  {
    SortController       sorter;
    ExecRow         inputRow;
    int            inputRowCountEstimate = (int) optimizerEstimatedRowCount;
        ExecIndexRow            sortTemplateRow = getRowTemplate();


    tc = getTransactionController();


    SortObserver observer;
    if (usingAggregateObserver)
      observer = new AggregateSortObserver(true, aggregates,
        aggregates, sortTemplateRow);
    else
      observer = new BasicSortObserver(true, false,
        sortTemplateRow, true);


    genericSortId = tc.createSort((Properties)null, 
        sortTemplateRow.getRowArray(),
        order,
        observer,
        false,
        inputRowCountEstimate, // est rows
        maxRowSize      // est rowsize 
    );
    sorter = tc.openSort(genericSortId);
  
    /* The sorter is responsible for doing the cloning */
    while ((inputRow = getNextRowFromRS()) != null) 
    {
      sorter.insert(inputRow.getRowArray());
    }
    source.close();
    sorter.completedInserts();
    sortProperties = sorter.getSortInfo().
      getAllSortInfo(sortProperties);
    if (aggInfoList.hasDistinct())
    {
      /*
      ** If there was a distinct aggregate, then that column

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   * @return  the sort controller
    */
  private ScanController loadSorter()
    throws StandardException
  {
    SortController       sorter;
    long           sortId;
    ExecRow         sourceRow;
    ExecRow          inputRow;
    boolean          inOrder = (order.length == 0 || isInSortedOrder);
    int            inputRowCountEstimate = (int) optimizerEstimatedRowCount;


    // find the language context and
        // Get the current transaction controller
    TransactionController tc = getTransactionController();
    sortId = tc.createSort((Properties)null, 
            sortTemplateRow.getRowArray(),
            order,
            observer,
            inOrder,
            inputRowCountEstimate, // est rows
             maxRowSize      // est rowsize 
            );
    sorter = tc.openSort(sortId);
    genericSortId = sortId;
    dropGenericSort = true;
  
    /* The sorter is responsible for doing the cloning */
    while ((inputRow = getNextRowFromRS()) != null) 
    {
      /* The sorter is responsible for doing the cloning */
      sorter.insert(inputRow.getRowArray());
    }
    source.close();
    sortProperties = sorter.getSortInfo().getAllSortInfo(sortProperties);
    sorter.completedInserts();


    return tc.openSortScan(sortId, activation.getResultSetHoldability());
  }

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            if (closeHeldControllers)
            {
                e = sortControllers.elements();
                while (e.hasMoreElements())
                {
                    SortController sc = (SortController) e.nextElement();
                    sc.close();
                }
                sortControllers.removeAllElements();
            }
        }

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            if (sortControllers != null)
            {
                e = sortControllers.elements();
                while (e.hasMoreElements())
                {
                    SortController sc = (SortController) e.nextElement();
                    str += "open sort controller: " + sc + "\n";
                }
            }


            if (sorts != null)

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org.apache.derby.impl.sql.execute.CreateIndexConstantAction

org.apache.derby.impl.sql.execute.DistinctScalarAggregateResultSet

org.apache.derby.impl.sql.execute.GroupedAggregateResultSet

org.apache.derby.impl.sql.execute.SortResultSet

org.apache.derby.impl.store.access.RAMTransaction

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