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

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

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

org.apache.derby.iapi.store.access.ConglomerateController
A conglomerate is an abstract storage structure (they correspond to access methods). The ConglomerateController interface is the interface that access manager clients can use to manipulate the contents of the underlying conglomerate.
Each conglomerate holds a set of rows. Each row has a row location. The conglomerate provides methods for:
- Inserting rows,
- Fetching, deleting, and replacing entire rows by row location, and
- fetching and updating individual columns of a row identified by row location.
Conglomerates do not provide any mechanism for associative access to rows within the conglomerate; this type of access is provided by scans via the ScanController interface.
Although all conglomerates have the same interface, they have different implementations. The implementation of a conglomerate determines some of its user-visible semantics; for example whether the rows are ordered or what the types of the rows' columns must be. The implementation is specified by an implementation id. Currently there are two implementations, "heap", and "btree". The details of their behavior are specified in their implementation documentation. (Currently, only "heap" is implemented).
All conglomerate operations are subject to the transactional isolation of the transaction they were opened from. Transaction rollback will close all conglomerates. Transaction commit will close all non-held conglomerates.
Scans are opened from a TransactionController.
A ConglomerateController can handle partial rows. Partial rows are described in RowUtil. @see TransactionController#openConglomerate @see RowUtil

            int            indexId, 
            int            indexCol, 
            DataValueDescriptor    schemaIdOrderable )
    throws StandardException
  {
    ConglomerateController  heapCC = null;
    ExecIndexRow        indexRow1;
    ExecIndexRow      indexTemplateRow;
    ExecRow         outRow;
    ScanController      scanController = null;
    boolean          foundRow;
    FormatableBitSet          colToCheck = new FormatableBitSet(indexCol);
    CatalogRowFactory    rf = ti.getCatalogRowFactory();  


    if (SanityManager.DEBUG)
    {
      SanityManager.ASSERT(indexId >= 0, "code needs to be enhanced"+
        " to support a table scan to find the index id");
    }


    colToCheck.set(indexCol - 1);


    ScanQualifier[][] qualifier = exFactory.getScanQualifier(1);
    qualifier[0][0].setQualifier
        (indexCol - 1,
         schemaIdOrderable,
         Orderable.ORDER_OP_EQUALS,
         false,
         false,
         false);


    outRow = rf.makeEmptyRow();


    try
    {
      heapCC = 
              tc.openConglomerate(
                  ti.getHeapConglomerate(), false, 0, 
                    TransactionController.MODE_RECORD,
                    TransactionController.ISOLATION_REPEATABLE_READ);
  
      scanController = tc.openScan(
          ti.getIndexConglomerate(indexId),  // conglomerate to open
          false,                 // don't hold open across commit
          0,                                  // for read
                  TransactionController.MODE_RECORD,  // row locking
                    TransactionController.ISOLATION_REPEATABLE_READ,
          colToCheck,             // don't get any rows
          null,                 // start position - first row
          ScanController.GE,            // startSearchOperation
          qualifier,               // scanQualifier,
          null,                 // stop position - through last row
          ScanController.GT);           // stopSearchOperation
  
      foundRow = (scanController.next());
    }
    finally
    {
      if (scanController != null)  
      {
        scanController.close();
      }
      if (heapCC != null)
      {
        heapCC.close();
      }
    }
    
    return foundRow;
  }

View Full Code Here

           * we start retrieving results.  The assumption is to
           * delete current row right after we retrieve it.
           */
          futureRowResultSet.deleteCurrentRow();
          RowLocation rl = (RowLocation) ridRow.getColumn(1);
          ConglomerateController baseCC = activation.getHeapConglomerateController();
          if (sparseRow == null)
            getSparseRowAndMap();
                   baseCC.fetch(
                           rl, sparseRow.getRowArray(), sparseRowMap);
          RowLocation rl2 = (RowLocation) rl.getClone();
          currentRow.setColumn(currentRow.nColumns(), rl2);
          candidate.setColumn(candidate.nColumns(), rl2);    // have to be consistent!

View Full Code Here


      super.close();


      if (indexCols != null)
      {
        ConglomerateController borrowedBaseCC = activation.getHeapConglomerateController();
        if (borrowedBaseCC != null)
        {
          borrowedBaseCC.close();
          activation.clearHeapConglomerateController();
        }
      }
      if (futureRowResultSet != null)
        futureRowResultSet.close();

View Full Code Here

    }


    conglomerateNumber = new long[cds.length];
    indexRow = new ExecIndexRow[cds.length];
    objectUUID = new UUID[cds.length];
    ConglomerateController heapCC =
      tc.openConglomerate(td.getHeapConglomerateId(), false, 0,
          TransactionController.MODE_RECORD,
          TransactionController.ISOLATION_REPEATABLE_READ);


    try
    {
      for (int i = 0; i < cds.length; i++)
      {
        if (!cds[i].isIndex())
        {
          conglomerateNumber[i] = -1;
          continue;
        }


        conglomerateNumber[i] = cds[i].getConglomerateNumber();


        objectUUID[i] = cds[i].getUUID();


        indexRow[i] =
          cds[i].getIndexDescriptor().getNullIndexRow(
            td.getColumnDescriptorList(),
            heapCC.newRowLocationTemplate());
      }
    }
    finally
    {
      heapCC.close();
    }


    dd.startWriting(lcc);


    dm.invalidateFor(td, DependencyManager.UPDATE_STATISTICS, lcc);

View Full Code Here

    // Get the ConglomerateDescriptor for the index
    ConglomerateDescriptor cd = 
            td.getConglomerateDescriptor(indexConglomerateNumbers[index]);


    // Build the properties list for the new conglomerate
    ConglomerateController indexCC = 
            tc.openConglomerate(
                indexConglomerateNumbers[index],
                false,
                TransactionController.OPENMODE_FORUPDATE,
                TransactionController.MODE_TABLE,
                TransactionController.ISOLATION_SERIALIZABLE);


    // Get the properties on the old index
    indexCC.getInternalTablePropertySet(properties);


    /* Create the properties that language supplies when creating the
     * the index.  (The store doesn't preserve these.)
     */
    int indexRowLength = indexRows[index].nColumns();
    properties.put("baseConglomerateId", Long.toString(newHeapConglom));
    if (cd.getIndexDescriptor().isUnique())
    {
      properties.put(
                "nUniqueColumns", Integer.toString(indexRowLength - 1));
    }
    else
    {
      properties.put(
                "nUniqueColumns", Integer.toString(indexRowLength));
    }
    if(cd.getIndexDescriptor().isUniqueWithDuplicateNulls())
    {
      properties.put(
                    "uniqueWithDuplicateNulls", Boolean.toString(true));
    }


    properties.put(
            "rowLocationColumn", Integer.toString(indexRowLength - 1));
    properties.put(
            "nKeyFields", Integer.toString(indexRowLength));


    indexCC.close();


    // We can finally drain the sorter and rebuild the index
    // Populate the index.
    
    RowLocationRetRowSource cCount           = null;

View Full Code Here

      /* Special code generation for RID since expression is CurrentRowLocationNode.
       * Really need yet another node type that does its own code generation.
       */
      if (rc.getExpression() instanceof CurrentRowLocationNode)
      {
        ConglomerateController cc = null;
        int savedItem;
        RowLocation rl;
        
        cc = getLanguageConnectionContext().
            getTransactionCompile().openConglomerate(
              conglomerateId,
                            false,
              0,
              TransactionController.MODE_RECORD,
              TransactionController.ISOLATION_READ_COMMITTED);
        try
        {
          rl = cc.newRowLocationTemplate();
        }
        finally
        {
          if (cc != null)
          {
            cc.close();
          }
        }


        savedItem = acb.addItem(rl);

View Full Code Here

   */
  final void lockTableForDDL(TransactionController tc,
             long heapConglomerateNumber, boolean exclusiveMode)
    throws StandardException
  {
    ConglomerateController cc;


    cc = tc.openConglomerate(
          heapConglomerateNumber,
                    false,
          (exclusiveMode) ?
            (TransactionController.OPENMODE_FORUPDATE | 
              TransactionController.OPENMODE_FOR_LOCK_ONLY) :
            TransactionController.OPENMODE_FOR_LOCK_ONLY,
              TransactionController.MODE_TABLE,
                    TransactionController.ISOLATION_SERIALIZABLE);
    cc.close();
  }

View Full Code Here

            int            indexId, 
            int            indexCol, 
            DataValueDescriptor    schemaIdOrderable )
    throws StandardException
  {
    ConglomerateController  heapCC = null;
    ExecIndexRow        indexRow1;
    ExecIndexRow      indexTemplateRow;
    ExecRow         outRow;
    ScanController      scanController = null;
    boolean          foundRow;
    FormatableBitSet          colToCheck = new FormatableBitSet(indexCol);
    CatalogRowFactory    rf = ti.getCatalogRowFactory();  


    if (SanityManager.DEBUG)
    {
      SanityManager.ASSERT(indexId >= 0, "code needs to be enhanced"+
        " to support a table scan to find the index id");
    }


    colToCheck.set(indexCol - 1);


    ScanQualifier[][] qualifier = exFactory.getScanQualifier(1);
    qualifier[0][0].setQualifier
        (indexCol - 1,
         schemaIdOrderable,
         Orderable.ORDER_OP_EQUALS,
         false,
         false,
         false);


    outRow = rf.makeEmptyRow();


    try
    {
      heapCC = 
              tc.openConglomerate(
                  ti.getHeapConglomerate(), false, 0, 
                    TransactionController.MODE_RECORD,
                    TransactionController.ISOLATION_REPEATABLE_READ);
  
      scanController = tc.openScan(
          ti.getIndexConglomerate(indexId),  // conglomerate to open
          false,                 // don't hold open across commit
          0,                                  // for read
                  TransactionController.MODE_RECORD,  // row locking
                    TransactionController.ISOLATION_REPEATABLE_READ,
          colToCheck,             // don't get any rows
          null,                 // start position - first row
          ScanController.GE,            // startSearchOperation
          qualifier,               // scanQualifier,
          null,                 // stop position - through last row
          ScanController.GT);           // stopSearchOperation
  
      foundRow = (scanController.next());
    }
    finally
    {
      if (scanController != null)  
      {
        scanController.close();
      }
      if (heapCC != null)
      {
        heapCC.close();
      }
    }
    
    return foundRow;
  }

View Full Code Here

   */
  public void  dropTableDescriptor(TableDescriptor td, SchemaDescriptor schema,
                  TransactionController tc)
    throws StandardException
  {
    ConglomerateController  heapCC;
    ExecIndexRow      keyRow1 = null;
    DataValueDescriptor    schemaIDOrderable;
    DataValueDescriptor    tableNameOrderable;
    TabInfoImpl          ti = coreInfo[SYSTABLES_CORE_NUM];

View Full Code Here

   */
  public void updateLockGranularity(TableDescriptor td, SchemaDescriptor schema,
                    char lockGranularity, TransactionController tc)
    throws StandardException
  {
    ConglomerateController  heapCC;
    ExecIndexRow      keyRow1 = null;
    ExecRow            row;
    DataValueDescriptor    schemaIDOrderable;
    DataValueDescriptor    tableNameOrderable;
    TabInfoImpl          ti = coreInfo[SYSTABLES_CORE_NUM];

View Full Code Here

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