Examples of org.apache.derby.iapi.types.RowLocation

org.apache.derby.iapi.types.RowLocation
Holds the location of a row within a given conglomerate. A row location is not valid except in the conglomerate from which it was obtained. They are used to identify rows for fetches, deletes, and updates through a conglomerate controller.
See the conglomerate implementation specification for information about the conditions under which a row location remains valid.

        long                    conglomid;
        long                    base_conglomid;
        long                    index_conglomid;
        ConglomerateController  base_cc             = null;
        ConglomerateController  index_cc            = null;
        RowLocation             base_rowloc         = null;


        base_row = TemplateRow.newU8Row(3);


        if (init_conglomerate_type.compareTo("BTREE") == 0)
        {

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          "getPreparedStatement().getSavedObject(itemNumber) expected to be " +
          "instance of RowLocation, not " +
          getPreparedStatement().getSavedObject(itemNumber).getClass().getName() +
          ", query is " + getPreparedStatement().getSource());
      }
      RowLocation rl = (RowLocation) getPreparedStatement().getSavedObject(itemNumber);
      if (! (rl.cloneObject() instanceof RowLocation))
      {
        SanityManager.THROWASSERT(
          "rl.cloneObject() expected to be " +
          "instance of RowLocation, not " +
          rl.getClass().getName() +
          ", query is " + getPreparedStatement().getSource());
      }
    }
    /* We have to return a clone of the saved RowLocation due
     * to the shared cache of SPSs.

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    if (!indexsc.fetchNext(indexRow))
    {
      return null;
    }
    
    RowLocation baseRowLocation =  (RowLocation) indexRow[1];
    boolean base_row_exists = 
            heapCC.fetch(
                baseRowLocation, currentRow.getRowArray(), (FormatableBitSet) null);


        if (SanityManager.DEBUG)

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                TransactionController.MODE_RECORD,
                TransactionController.ISOLATION_SERIALIZABLE);


    // Create a row.
        T_SecondaryIndexRow template = new T_SecondaryIndexRow();
        RowLocation         row_loc  = base_cc.newRowLocationTemplate();
        template.init(base_row, row_loc, 5);


        // insert them in reverse order just to make sure btree is sorting them
        for (int i = col1.length - 1; i >= 0; i--)
        {

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                TransactionController.MODE_RECORD,
                TransactionController.ISOLATION_SERIALIZABLE);


    // Create a row.
        T_SecondaryIndexRow template = new T_SecondaryIndexRow();
        RowLocation         row_loc  = base_cc.newRowLocationTemplate();
        template.init(base_row, row_loc, 5);


        // insert them in reverse order just to make sure btree is sorting them
        for (int i = col1.length - 1; i >= 0; i--)
        {

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                TransactionController.ISOLATION_SERIALIZABLE);


    // objects used to insert rows into base and index tables.
    DataValueDescriptor[] r1            = TemplateRow.newU8Row(2);
        T_SecondaryIndexRow   index_row1    = new T_SecondaryIndexRow();
        RowLocation           base_rowloc1  = base_cc.newRowLocationTemplate();


        index_row1.init(r1, base_rowloc1, 3);


        // insert one row into the table/index

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


    RowLocation          heapLocation = 
            heapScan.newRowLocationTemplate();


    ConglomerateController    indexController = 
      tc.openConglomerate( 
        indexConglomerateNumber,

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                TransactionController.OPENMODE_FORUPDATE,
                TransactionController.MODE_RECORD,
                TransactionController.ISOLATION_SERIALIZABLE);


        // initialize the secondary index row - pointing it at base row
        RowLocation base_rowloc = base_cc.newRowLocationTemplate();
        index_row.init(base_row, base_rowloc, num_cols + 1);
        
        // create the secondary index
        Properties properties = 
            createProperties(

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        index_cc.checkConsistency();


    // Create a row and insert into base table, remembering it's location.
    DataValueDescriptor[] r1             = TemplateRow.newU8Row(2);
        T_SecondaryIndexRow  index_row1      = new T_SecondaryIndexRow();
        RowLocation          base_rowloc1    = base_cc.newRowLocationTemplate();


        index_row1.init(r1, base_rowloc1, 3);
    ((SQLLongint) r1[0]).setValue(2);
    ((SQLLongint) r1[1]).setValue(2);


    // Insert the row into the base table and remember its location.
    base_cc.insertAndFetchLocation(r1, base_rowloc1);


        // Insert the row into the secondary index.
        if (index_cc.insert(index_row1.getRow()) != 0)
      throw T_Fail.testFailMsg("insert failed");


    // Make sure we read back the value we wrote from base and index table.
    DataValueDescriptor[] r2            = TemplateRow.newU8Row(2);
        T_SecondaryIndexRow   index_row2    = new T_SecondaryIndexRow();
        RowLocation           base_rowloc2  = base_cc.newRowLocationTemplate();


        index_row2.init(r2, base_rowloc2, 3);


        // base table check:
        if (!base_cc.fetch(base_rowloc1, r2, (FormatableBitSet) null))

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        index_cc.checkConsistency();


    // Create a row and insert into base table, remembering it's location.
    DataValueDescriptor[]   r1           = TemplateRow.newU8Row(2);
        T_SecondaryIndexRow     index_row1   = new T_SecondaryIndexRow();
        RowLocation             base_rowloc1 = base_cc.newRowLocationTemplate();


        index_row1.init(r1, base_rowloc1, 3);


        // Commit the create of the tables so that the following aborts don't
        // undo that work.

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