Package org.apache.cassandra.thrift

Examples of org.apache.cassandra.thrift.IndexExpression$IndexExpressionTupleSchemeFactory

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    public List<Row> scan(IndexClause clause, AbstractBounds range, IFilter dataFilter)
    {
        // Start with the most-restrictive indexed clause, then apply remaining clauses
        // to each row matching that clause.
        // TODO: allow merge join instead of just one index + loop
        IndexExpression primary = highestSelectivityPredicate(clause);
        ColumnFamilyStore indexCFS = getIndexedColumnFamilyStore(primary.column_name);
        if (logger.isDebugEnabled())
            logger.debug("Primary scan clause is " + getComparator().getString(primary.column_name));
        assert indexCFS != null;
        DecoratedKey indexKey = indexCFS.partitioner.decorateKey(primary.value);
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                             metadata.getColumn_metadata().get(expr.column_name).getValidator().getString(expr.value));
    }

    private IndexExpression highestSelectivityPredicate(IndexClause clause)
    {
        IndexExpression best = null;
        int bestMeanCount = Integer.MAX_VALUE;
        for (IndexExpression expression : clause.expressions)
        {
            ColumnFamilyStore cfs = getIndexedColumnFamilyStore(expression.column_name);
            if (cfs == null || !expression.op.equals(IndexOperator.EQ))
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        ColumnFamilyStore cfi = cfs.getIndexedColumnFamilyStore(COLUMN);
        assertTrue(cfi.isIndexBuilt());

        // verify we get it back w/ index query too
        IndexExpression expr = new IndexExpression(COLUMN, IndexOperator.EQ, VALUE);
        IndexClause clause = new IndexClause(Arrays.asList(expr), ByteBufferUtil.EMPTY_BYTE_BUFFER, Integer.MAX_VALUE);
        IFilter filter = new IdentityQueryFilter();
        IPartitioner p = StorageService.getPartitioner();
        Range range = new Range(p.getMinimumToken(), p.getMinimumToken());
        rows = table.getColumnFamilyStore(CF1).scan(clause, range, filter);
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        assert sstr != null;
        ColumnFamilyStore cfs = Table.open("Keyspace1").getColumnFamilyStore("Indexed1");
        cfs.addSSTable(sstr);
        cfs.buildSecondaryIndexes(cfs.getSSTables(), cfs.getIndexedColumns());
       
        IndexExpression expr = new IndexExpression(ByteBufferUtil.bytes("birthdate"), IndexOperator.EQ, ByteBufferUtil.bytes(1L));
        IndexClause clause = new IndexClause(Arrays.asList(expr), ByteBufferUtil.EMPTY_BYTE_BUFFER, 100);
        IFilter filter = new IdentityQueryFilter();
        IPartitioner p = StorageService.getPartitioner();
        Range range = new Range(p.getMinimumToken(), p.getMinimumToken());
        List<Row> rows = cfs.scan(clause, range, filter);
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        // confirm that the secondary index was recovered
        for (String key : keys)
        {
            long val = key.hashCode();
            IPartitioner p = StorageService.getPartitioner();
            IndexExpression expr = new IndexExpression(ByteBufferUtil.bytes("birthdate"),
                                                       IndexOperator.EQ,
                                                       ByteBufferUtil.bytes(val));
            List<IndexExpression> clause = Arrays.asList(expr);
            IFilter filter = new IdentityQueryFilter();
            Range<RowPosition> range = Util.range("", "");
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        long start = System.currentTimeMillis();
        while (!index.isIndexBuilt(COLUMN) && System.currentTimeMillis() < start + 10000)
            Thread.sleep(10);

        // verify we get it back w/ index query too
        IndexExpression expr = new IndexExpression(COLUMN, IndexOperator.EQ, VALUE);
        List<IndexExpression> clause = Arrays.asList(expr);
        IFilter filter = new IdentityQueryFilter();
        IPartitioner p = StorageService.getPartitioner();
        Range<RowPosition> range = Util.range("", "");
        rows = table.getColumnFamilyStore(CF1).search(clause, range, Integer.MAX_VALUE, filter);
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            if (restriction.isEquality())
            {
                for (Term t : restriction.eqValues)
                {
                    ByteBuffer value = t.getByteBuffer(name.type, variables);
                    expressions.add(new IndexExpression(name.name.key, IndexOperator.EQ, value));
                }
            }
            else
            {
                for (Bound b : Bound.values())
                {
                    ByteBuffer value = restriction.bound(b).getByteBuffer(name.type, variables);
                    expressions.add(new IndexExpression(name.name.key, restriction.getIndexOperator(b), value));
                }
            }
        }
        return expressions;
    }
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        super(indexManager, columns);
    }
   
    private IndexExpression highestSelectivityPredicate(List<IndexExpression> clause)
    {
        IndexExpression best = null;
        int bestMeanCount = Integer.MAX_VALUE;
        for (IndexExpression expression : clause)
        {
            //skip columns belonging to a different index type
            if(!columns.contains(expression.column_name))
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    public ColumnFamilyStore.AbstractScanIterator getIndexedIterator(final AbstractBounds<RowPosition> range, final ExtendedFilter filter)
    {
        // Start with the most-restrictive indexed clause, then apply remaining clauses
        // to each row matching that clause.
        // TODO: allow merge join instead of just one index + loop
        final IndexExpression primary = highestSelectivityPredicate(filter.getClause());
        final SecondaryIndex index = indexManager.getIndexForColumn(primary.column_name);
        if (logger.isDebugEnabled())
            logger.debug("Primary scan clause is " + baseCfs.getComparator().getString(primary.column_name));
        assert index != null;
        final DecoratedKey indexKey = indexManager.getIndexKeyFor(primary.column_name, primary.value);
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        {
            int filterCount = dis.readInt();
            rowFilter = new ArrayList<IndexExpression>(filterCount);
            for (int i = 0; i < filterCount; i++)
            {
                IndexExpression expr = new IndexExpression();
                FBUtilities.deserialize(dser, expr, dis);
                rowFilter.add(expr);
            }
        }
        AbstractBounds<RowPosition> range = AbstractBounds.serializer().deserialize(dis, version).toRowBounds();
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