Examples of FetchDescriptor

org.apache.derby.iapi.store.raw.FetchDescriptor
FetchDescriptor is used to package up all the arguments necessary to describe what rows and what row parts should be returned from the store back to language as part of a fetch.
The FetchDescriptor may also contain scratch space used to process the qualifiers passed in the scan. This scratch space will be used to cache information about the qualifiers, valid column list, row size so that calculations need only be done once per scan rather than every iteration.

Examples of org.apache.derby.iapi.store.raw.FetchDescriptor

            return(ROWUTIL_FETCH_DESCRIPTOR_CONSTANTS[single_column_number]);
        }
        else
        {
            return(
                new FetchDescriptor(
                    single_column_number, single_column_number));
        }
    }

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Examples of org.apache.derby.iapi.store.raw.FetchDescriptor

        // need to allocate row with fieldId cols because of sparse row change
        // needs to be RESOLVED
    Object[] row = new Object[fieldId + 1];
    row[fieldId] = column;


    FetchDescriptor fetchDesc = 
      new FetchDescriptor(fieldId + 1, fieldId);


    return(fetchFromSlot(null, slot, row, fetchDesc, true));
  }

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Examples of org.apache.derby.iapi.store.raw.FetchDescriptor

                // purging rows. 
                Page page   = leaf.page;




                // RowLocation column is in last column of template.
                FetchDescriptor lock_fetch_desc = 
                    RowUtil.getFetchDescriptorConstant(
                        scratch_template.length - 1);


                // loop backward so that purges which affect the slot table 
                // don't affect the loop (ie. they only move records we

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Examples of org.apache.derby.iapi.store.raw.FetchDescriptor

                (init_lock_fetch_desc.getValidColumnsArray())[init_template.length - 1] == 1); 
        }


        // note that we don't process qualifiers in btree fetch's
        this.init_fetchDesc             = 
            new FetchDescriptor(
                init_template.length, init_scanColumnList,(Qualifier[][]) null);


        initScanParams( 
            startKeyValue, startSearchOperator, 
            qualifier, stopKeyValue, stopSearchOperator);

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Examples of org.apache.derby.iapi.store.raw.FetchDescriptor

        // RESOLVE (mikem) - get rid of new here.
        boolean ret_val = 
            (pos.current_page.fetchFromSlot(
                pos.current_rh, pos.current_slot, 
                row, 
                new FetchDescriptor(
                    row.length, validColumns, (Qualifier[][]) null), 
                false) != null);


        // RESOLVE (mikem) - should be some way to hide this in the unlock call,
        // and just always make the unlock call.

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Examples of org.apache.derby.iapi.store.raw.FetchDescriptor

        // RESOLVE (mikem) - get rid of new here.
        boolean ret_val = 
            (pos.current_page.fetchFromSlot(
                pos.current_rh, pos.current_slot, 
                row, 
                new FetchDescriptor(
                    row.length, validColumns, (Qualifier[][]) null), 
                false) != null);


        // RESOLVE (mikem) - should be some way to hide this in the unlock call,
        // and just always make the unlock call.

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Examples of org.apache.derby.iapi.store.raw.FetchDescriptor


        // TODO (mikem) - this could be more efficient, by writing
        // code to figure out length of row, but scratch row is cached
        // so allocating it here is probably not that bad.
        init_fetchDesc = 
            new FetchDescriptor(
              (open_conglom.getRuntimeMem().get_scratch_row(
                    open_conglom.getRawTran())).length,
              init_scanColumnList,
              init_qualifier);

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Examples of org.apache.derby.iapi.store.raw.FetchDescriptor

            return(ROWUTIL_FETCH_DESCRIPTOR_CONSTANTS[single_column_number]);
        }
        else
        {
            return(
                new FetchDescriptor(
                    single_column_number, single_column_number));
        }
    }

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Examples of org.apache.derby.iapi.store.raw.FetchDescriptor

        StoredRecordHeader recordHeader = getHeaderAtSlot(slot);


    if (recordHeader.isDeleted())
      return null;


        FetchDescriptor hack_fetch = 
            new FetchDescriptor(
                    row.length, validColumns, (Qualifier[][]) null);


    // magic to copy rows across ...
    restoreRecordFromSlot(
            slot, row, hack_fetch, handle, recordHeader, true);

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Examples of org.apache.derby.iapi.store.raw.FetchDescriptor

    row[fieldId] = column;
    FormatableBitSet singleColumn = new FormatableBitSet(fieldId + 1);


    singleColumn.set(fieldId);


        FetchDescriptor fetchDesc = 
            new FetchDescriptor(fieldId + 1, singleColumn,(Qualifier[][]) null);


    return(fetchFromSlot(null, slot, row, fetchDesc, true));
  }

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