Package org.apache.cassandra.db.columniterator

Examples of org.apache.cassandra.db.columniterator.IColumnIterator

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                    }
                }
            }
        }

        IColumnIterator ci = filter.getMemtableColumnIterator(cached, null, getComparator());
        ColumnFamily cf = ci.getColumnFamily().cloneMeShallow(ArrayBackedSortedColumns.factory(), filter.filter.isReversed());
        filter.collateColumns(cf, Collections.singletonList(ci), getComparator(), gcBefore);
        // TODO this is necessary because when we collate supercolumns together, we don't check
        // their subcolumns for relevance, so we need to do a second prune post facto here.
        return cf.isSuper() ? removeDeleted(cf, gcBefore) : removeDeletedCF(cf, gcBefore);
    }
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    /** filter a cached row, which will not be modified by the filter, but may be modified by throwing out
     *  tombstones that are no longer relevant. */
    ColumnFamily filterColumnFamily(ColumnFamily cached, QueryFilter filter, int gcBefore)
    {
        ColumnFamily cf = cached.cloneMeShallow();
        IColumnIterator ci = filter.getMemtableColumnIterator(cached, null, getComparator());
        filter.collectCollatedColumns(cf, ci, gcBefore);
        // TODO this is necessary because when we collate supercolumns together, we don't check
        // their subcolumns for relevance, so we need to do a second prune post facto here.
        return cf.isSuper() ? removeDeleted(cf, gcBefore) : removeDeletedCF(cf, gcBefore);
    }
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        // we are querying top-level columns, do a merging fetch with indexes.
        List<IColumnIterator> iterators = new ArrayList<IColumnIterator>();
        final ColumnFamily returnCF = ColumnFamily.create(metadata);
        try
        {
            IColumnIterator iter;
            int sstablesToIterate = 0;
            DataTracker.View currentView = data.getView();

            /* add the current memtable */
            iter = filter.getMemtableColumnIterator(currentView.memtable, getComparator());
            if (iter != null)
            {
                returnCF.delete(iter.getColumnFamily());
                iterators.add(iter);
            }

            /* add the memtables being flushed */
            for (Memtable memtable : currentView.memtablesPendingFlush)
            {
                iter = filter.getMemtableColumnIterator(memtable, getComparator());
                if (iter != null)
                {
                    returnCF.delete(iter.getColumnFamily());
                    iterators.add(iter);
                }
            }

            /* add the SSTables on disk */
            for (SSTableReader sstable : currentView.sstables)
            {
                iter = filter.getSSTableColumnIterator(sstable);
                if (iter.getColumnFamily() != null)
                {
                    returnCF.delete(iter.getColumnFamily());
                    iterators.add(iter);
                    sstablesToIterate++;
                }
            }

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                    // cut the resultset back to what was requested, if necessary
                    if (firstFilter != dataFilter || extraFilter != null)
                    {
                        ColumnFamily expandedData = data;
                        data = expandedData.cloneMeShallow();
                        IColumnIterator iter = dataFilter.getMemtableColumnIterator(expandedData, dk, getComparator());
                        new QueryFilter(dk, path, dataFilter).collectCollatedColumns(data, iter, gcBefore());
                    }

                    rows.add(new Row(dk, data));
                }
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                    }
                }
            }
        }

        IColumnIterator ci = filter.getMemtableColumnIterator(cached, null, getComparator());
        ColumnFamily cf = null;
        try
        {
            cf = ci.getColumnFamily().cloneMeShallow();
        }
        catch (IOException e)
        {
            throw new IOError(e);
        }
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        // we are querying top-level columns, do a merging fetch with indexes.
        List<IColumnIterator> iterators = new ArrayList<IColumnIterator>();
        final ColumnFamily returnCF = ColumnFamily.create(metadata);
        try
        {
            IColumnIterator iter;

            /* add the current memtable */
            iter = filter.getMemtableColumnIterator(getMemtableThreadSafe(), getComparator());
            if (iter != null)
            {
                returnCF.delete(iter.getColumnFamily());
                   
                iterators.add(iter);
            }

            /* add the memtables being flushed */
            for (Memtable memtable : memtablesPendingFlush)
            {
                iter = filter.getMemtableColumnIterator(memtable, getComparator());
                if (iter != null)
                {
                    returnCF.delete(iter.getColumnFamily());
                    iterators.add(iter);
                }
            }

            /* add the SSTables on disk */
            int sstablesToIterate = 0;
            for (SSTableReader sstable : ssTables)
            {
                iter = filter.getSSTableColumnIterator(sstable);
                if (iter.getColumnFamily() != null)
                {
                    returnCF.delete(iter.getColumnFamily());
                    iterators.add(iter);
                    sstablesToIterate++;
                }
            }
            recentSSTablesPerRead.add(sstablesToIterate);
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                    // cut the resultset back to what was requested, if necessary
                    if (firstFilter != dataFilter)
                    {
                        ColumnFamily expandedData = data;
                        data = expandedData.cloneMeShallow();
                        IColumnIterator iter = dataFilter.getMemtableColumnIterator(expandedData, dk, getComparator());
                        new QueryFilter(dk, path, dataFilter).collectCollatedColumns(data, iter, gcBefore());
                    }

                    rows.add(new Row(dk, data));
                }
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        SSTableImport.importJson(jsonUrl, "Keyspace1", "Standard1", tempSS.getPath());

        // Verify results
        SSTableReader reader = SSTableReader.open(Descriptor.fromFilename(tempSS.getPath()));
        QueryFilter qf = QueryFilter.getIdentityFilter(Util.dk("rowA"), new QueryPath("Standard1"));
        IColumnIterator iter = qf.getSSTableColumnIterator(reader);
        ColumnFamily cf = iter.getColumnFamily();
        while (iter.hasNext()) cf.addColumn(iter.next());
        assert cf.getColumn(ByteBufferUtil.bytes("colAA")).value().equals(ByteBuffer.wrap(hexToBytes("76616c4141")));
        assert !(cf.getColumn(ByteBufferUtil.bytes("colAA")) instanceof DeletedColumn);
        IColumn expCol = cf.getColumn(ByteBufferUtil.bytes("colAC"));
        assert expCol.value().equals(ByteBuffer.wrap(hexToBytes("76616c4143")));
        assert expCol instanceof ExpiringColumn;
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     *  The returned column family won't be thread safe.
     */
    ColumnFamily filterColumnFamily(ColumnFamily cached, QueryFilter filter, int gcBefore)
    {
        ColumnFamily cf = cached.cloneMeShallow(ArrayBackedSortedColumns.factory(), filter.filter.isReversed());
        IColumnIterator ci = filter.getMemtableColumnIterator(cached, null, getComparator());
        filter.collateColumns(cf, Collections.singletonList(ci), getComparator(), gcBefore);
        // TODO this is necessary because when we collate supercolumns together, we don't check
        // their subcolumns for relevance, so we need to do a second prune post facto here.
        return cf.isSuper() ? removeDeleted(cf, gcBefore) : removeDeletedCF(cf, gcBefore);
    }
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                    // cut the resultset back to what was requested, if necessary
                    if (firstFilter != dataFilter || extraFilter != null)
                    {
                        ColumnFamily expandedData = data;
                        data = expandedData.cloneMeShallow();
                        IColumnIterator iter = dataFilter.getMemtableColumnIterator(expandedData, dk, baseCfs.getComparator());
                        new QueryFilter(dk, path, dataFilter).collateColumns(data, Collections.singletonList(iter), baseCfs.getComparator(), baseCfs.gcBefore());
                    }

                    rows.add(new Row(dk, data));
                }
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Related Classes of org.apache.cassandra.db.columniterator.IColumnIterator

  • org.apache.cassandra.db.CollationController
  • org.apache.cassandra.db.ColumnFamilyStore
  • org.apache.cassandra.db.compaction.CompactionsTest
  • org.apache.cassandra.db.filter.ExtendedFilter$FilterWithClauses
  • org.apache.cassandra.db.index.keys.KeysSearcher
  • org.apache.cassandra.db.RowIteratorFactory$ConvertToColumnIterator
  • org.apache.cassandra.io.sstable.SSTableUtils
  • org.apache.cassandra.tools.SSTableExport
  • org.apache.cassandra.tools.SSTableImportTest
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