Examples of org.apache.derby.iapi.sql.dictionary.ConglomerateDescriptor

Package org.apache.derby.iapi.sql.dictionary

Examples of org.apache.derby.iapi.sql.dictionary.ConglomerateDescriptor

org.apache.derby.iapi.sql.dictionary.ConglomerateDescriptor
The ConglomerateDescriptor class is used to get information about conglomerates for the purpose of optimization. A ConglomerateDescriptor can map to a base table, an index or a index backing a constraint. Multiple ConglomerateDescriptors can map to a single underlying store conglomerate, such as when multiple index definitions share a physical file. NOTE: The language module does not have to know much about conglomerates with this architecture. To get the cost of using a conglomerate, all it has to do is pass the ConglomerateDescriptor to the access methods, along with the predicate. What the access methods need from a ConglomerateDescriptor remains to be seen. @version 0.1

  {
    SchemaDescriptor    sd = getSystemSchemaDescriptor( );
    DataDescriptorGenerator ddg = getDataDescriptorGenerator();
    long          indexConglomerateNumber;


    ConglomerateDescriptor  conglomerateDescriptor = bootstrapOneIndex
      ( sd, tc, ddg, ti, indexNumber, heapConglomerateNumber );


    indexConglomerateNumber = conglomerateDescriptor.getConglomerateNumber();


    addDescriptor(conglomerateDescriptor, sd, 
            SYSCONGLOMERATES_CATALOG_NUM, false, tc);
            
    return indexConglomerateNumber;

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    int              numColumns;
    long            conglomId;
    RowLocation          rl;
    CatalogRowFactory      rf = ti.getCatalogRowFactory();
    IndexRowGenerator      irg;
    ConglomerateDescriptor  conglomerateDescriptor;


    initSystemIndexVariables(ddg, ti, indexNumber);


    irg = ti.getIndexRowGenerator(indexNumber);

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    addDescriptor(td, sd, SYSTABLES_CATALOG_NUM,
            false, tc);
    toid = td.getUUID();
  
    /* Add the conglomerate for the heap */
    ConglomerateDescriptor cgd = ddg.newConglomerateDescriptor(conglomId,
                                  heapName,
                                  false,
                                  null,
                                  false,
                                  heapUUID,

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      if (td == null)
      {
        return;
      }


      ConglomerateDescriptor cd = null;
      ConglomerateDescriptor[] cds = td.getConglomerateDescriptors();


      /* Init the heap conglomerate here */
      for (int index = 0; index < cds.length; index++)
      {
        cd = cds[index];


        if (! cd.isIndex())
        {
          ti.setHeapConglomerate(cd.getConglomerateNumber());
          break;
        }
      }
      
      if (SanityManager.DEBUG)
      {
        if (cd == null)
        {
          SanityManager.THROWASSERT("No heap conglomerate found for " 
            + ti.getTableName());
        }
      }


      /* Initialize the index conglomerates */
      numIndexes = ti.getCatalogRowFactory().getNumIndexes();
      if (numIndexes == 0)
      {
        return;
      }


      /* For each index, we get its id from the CDL */
      ConglomerateDescriptor icd = null;
      int  indexCount = 0;


      for (int index = 0; index < cds.length; index++)
      {
        icd = cds[index];


        if (icd.isIndex())
        {
          ti.setIndexConglomerate(icd);
          indexCount++;
        }
        continue;

View Full Code Here

          ConglomerateDescriptor[] conglom_descriptors = 
                td.getConglomerateDescriptors();


            for (int cd_idx = 0; cd_idx < conglom_descriptors.length; cd_idx++)
            {
                ConglomerateDescriptor cd = conglom_descriptors[cd_idx];


                tc.compressConglomerate(cd.getConglomerateNumber());
            }
          }
        }


        return;

View Full Code Here




        int index_idx = 0;
        for (int cd_idx = 0; cd_idx < conglom_descriptors.length; cd_idx++)
        {
            ConglomerateDescriptor index_cd = conglom_descriptors[cd_idx];


            if (!index_cd.isIndex())
            {
                // skip the heap descriptor entry
                continue;
            }


            // ScanControllers are used to delete old index row
            index_scan[index_idx] = 
                tc.openScan(
                    index_cd.getConglomerateNumber(),
                    true,  // hold
                    TransactionController.OPENMODE_FORUPDATE,
                    TransactionController.MODE_TABLE,
                    TransactionController.ISOLATION_SERIALIZABLE,
                    null,   // full row is retrieved, 
                            // so that full row can be used for start/stop keys
                    null,  // startKeyValue - will be reset with reopenScan()
                    0,    // 
                    null,  // qualifier
                    null,  // stopKeyValue  - will be reset with reopenScan()
                    0);    // 


            // ConglomerateControllers are used to insert new index row
            index_cc[index_idx] = 
                tc.openConglomerate(
                    index_cd.getConglomerateNumber(),
                    true,  // hold
                    TransactionController.OPENMODE_FORUPDATE,
                    TransactionController.MODE_TABLE,
                    TransactionController.ISOLATION_SERIALIZABLE);


            // build column map to allow index row to be built from base row
            int[] baseColumnPositions   = 
                index_cd.getIndexDescriptor().baseColumnPositions();
            int[] zero_based_map        = 
                new int[baseColumnPositions.length];


            for (int i = 0; i < baseColumnPositions.length; i++)
            {

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            ConglomerateDescriptor[] conglom_descriptors = 
                td.getConglomerateDescriptors();


            for (int cd_idx = 0; cd_idx < conglom_descriptors.length; cd_idx++)
            {
                ConglomerateDescriptor cd = conglom_descriptors[cd_idx];


                tc.purgeConglomerate(cd.getConglomerateNumber());
            }
          }
        }


        return;

View Full Code Here

                {
                    if (columns.elementAt(count).getPosition() != columnPostion)
                        break;


                    //get backing index
                    ConglomerateDescriptor desc = 
                        td.getConglomerateDescriptor(cd.getConglomerateId());


                    //check if the backing index was created when the column
                    //not null ie is backed by unique index
                    if (!desc.getIndexDescriptor().isUnique())
                        break;


                    // replace backing index with a unique when not null index.
                    recreateUniqueConstraintBackingIndexAsUniqueWhenNotNull(
                        desc, td, activation, lcc);

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     * RESOLVE - this will change in 1.4 because we will get
     * back the same conglomerate number
     */
    // Get the ConglomerateDescriptor for the heap
    long oldHeapConglom       = td.getHeapConglomerateId();
    ConglomerateDescriptor cd = 
            td.getConglomerateDescriptor(oldHeapConglom);


    // Update sys.sysconglomerates with new conglomerate #
    dd.updateConglomerateDescriptor(cd, newHeapConglom, tc);

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    }


    // Update the DataDictionary
    // Get the ConglomerateDescriptor for the heap
    long oldHeapConglom = td.getHeapConglomerateId();
    ConglomerateDescriptor cd = td.getConglomerateDescriptor(oldHeapConglom);


    // Update sys.sysconglomerates with new conglomerate #
    dd.updateConglomerateDescriptor(cd, newHeapConglom, tc);
    // Drop the old conglomerate
    tc.dropConglomerate(oldHeapConglom);

View Full Code Here

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