List of fetchNext() Examples

Examples of fetchNext()

org.apache.derby.iapi.store.access.ScanController.fetchNext()
Fetch the (partial) row at the next position of the Scan. If there is a valid next position in the scan then the value in the destRow storable row is replaced with the value of the row at the current scan position. The columns of the destRow row must be of the same type as the actual columns in the underlying conglomerate. The resulting contents of destRow after a fetchNext() which returns false is undefined. The result of calling fetchNext(row) is exactly logically equivalent to making a next() call followed by a fetch(row) call. This interface allows implementations to optimize the 2 calls if possible. @param destRow The destRow row into which the valueof the next position in the scan is to be stored. @return True if there is a next position in the scan,false if there isn't. @exception StandardException Standard exception policy. @see ScanController#fetch @see RowUtil

Examples of org.apache.derby.iapi.store.access.ScanController.fetchNext()


        // it is important for read uncommitted scans to use fetchNext() rather
        // than fetch, so that the fetch happens while latch is held, otherwise
        // the next() might position the scan on a row, but the subsequent
        // fetch() may find the row deleted or purged from the table.
    while(scanController.fetchNext(outRow.getRowArray()))
    {
      TableDescriptor td = (TableDescriptor)
        rf.buildDescriptor(outRow, (TupleDescriptor)null,
                   this);
      ht.put(td.getUUID(), td);

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Examples of org.apache.derby.iapi.store.access.ScanController.fetchNext()

            ScanController.GE,      // startSearchOperation
      null,
      null,   // stop position - through last row
            ScanController.GT);     // stopSearchOperation


    while (scanController.fetchNext(outRow.getRowArray()))
        {
      DependencyDescriptor    dependencyDescriptor;


      dependencyDescriptor = (DependencyDescriptor)
             rf.buildDescriptor(outRow,

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Examples of org.apache.derby.iapi.store.access.ScanController.fetchNext()

        ScanController.GT);     // stopSearchOperation


        /* OK to fetch into the template row, 
         * since we won't be doing a next.
         */
    if (scanController.fetchNext(indexTemplateRow.getRowArray()))
    {
      RowLocation  baseRowLocation;




      baseRowLocation = (RowLocation)  indexTemplateRow.getColumn(

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Examples of org.apache.derby.iapi.store.access.ScanController.fetchNext()

        0,              // startSearchOperation - none
        scanQualifiers,     // scanQualifier,
        (DataValueDescriptor[]) null,    // stop position - through last row
        0);             // stopSearchOperation - none


    while (scanController.fetchNext(outRow.getRowArray()))
    {
      td = rf.buildDescriptor(outRow, parentTupleDescriptor, this);


      /* If dList is null, then caller only wants a single descriptor - we're done
       * else just add the current descriptor to the list.

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Examples of org.apache.derby.iapi.store.access.ScanController.fetchNext()

      // It is important for read uncommitted scans to use fetchNext()
      // rather than fetch, so that the fetch happens while latch is
      // held, otherwise the next() might position the scan on a row,
      // but the subsequent fetch() may find the row deleted or purged
      // from the table.
      if (!scanController.fetchNext(indexRow1.getRowArray())) {
        break;
      }


      baseRowLocation = (RowLocation)  indexRow1.getColumn(
                        indexRow1.nColumns());

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Examples of org.apache.derby.iapi.store.access.ScanController.fetchNext()

        0,              // startSearchOperation - none
        scanQualifiers,     // scanQualifier,
        (DataValueDescriptor[]) null,    // stop position - through last row
        0);             // stopSearchOperation - none


    while (scanController.fetchNext(outRow.getRowArray()))
    {
      td = rf.buildDescriptor(outRow, parentTupleDescriptor, this);


      /* If dList is null, then caller only wants a single descriptor - we're done
       * else just add the current descriptor to the list.

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Examples of org.apache.derby.iapi.store.access.ScanController.fetchNext()

    boolean result = false;


    try {
      ExecRow outRow = rf.makeEmptyRow();


      if (sc.fetchNext(outRow.getRowArray())) {
        result = true;
      }
    } finally {
      if (sc != null) {
        sc.close();

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Examples of org.apache.derby.iapi.store.access.ScanController.fetchNext()

      ExecIndexRow indexRow = getIndexRowFromHeapRow(
        ti.getIndexRowGenerator(rf.SYSROLES_INDEX_ID_EE_OR_IDX),
        heapCC.newRowLocationTemplate(),
        outRow);


      while (sc.fetchNext(indexRow.getRowArray())) {
        if (action == DataDictionaryImpl.EXISTS) {
          return true;
        } else if (action == DataDictionaryImpl.DROP) {
          ti.deleteRow(tc, indexRow,
                 rf.SYSROLES_INDEX_ID_EE_OR_IDX);

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Examples of org.apache.derby.iapi.store.access.ScanController.fetchNext()

      0);                           // stopSearchOperation - none


    ExecRow outRow =  rf.makeEmptyRow();
    RoleGrantDescriptor grantDescr;


    while (sc.fetchNext(outRow.getRowArray())) {
      grantDescr = (RoleGrantDescriptor)rf.buildDescriptor(
        outRow,
        (TupleDescriptor) null,
        this);

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Examples of org.apache.derby.iapi.store.access.ScanController.fetchNext()

      ExecIndexRow indexRow = getIndexRowFromHeapRow(
        ti.getIndexRowGenerator(indexNo),
        heapCC.newRowLocationTemplate(),
        outRow);


      while (sc.fetchNext(indexRow.getRowArray())) {
        RowLocation baseRowLocation = (RowLocation)indexRow.getColumn(
          indexRow.nColumns());


        boolean base_row_exists =
          heapCC.fetch(

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