Package org.apache.cassandra.thrift

Examples of org.apache.cassandra.thrift.IndexExpression

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        this.prefixSize = prefixSize;
    }

    private IndexExpression highestSelectivityPredicate(List<IndexExpression> clause)
    {
        IndexExpression best = null;
        int bestMeanCount = Integer.MAX_VALUE;
        Map<SecondaryIndex, Integer> candidates = new HashMap<SecondaryIndex, Integer>();

        for (IndexExpression expression : clause)
        {
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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);
        assert index != null;
        final DecoratedKey indexKey = index.getIndexKeyFor(primary.value);

        if (logger.isDebugEnabled())
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    {

        // 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);
        assert index != null;
        final DecoratedKey indexKey = index.getIndexKeyFor(primary.value);

        if (logger.isDebugEnabled())
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                        ByteBuffer value = slice.bound(b, variables);
                        if (value == null)
                            throw new InvalidRequestException(String.format("Unsupported null value for indexed column %s", name));
                        if (value.remaining() > 0xFFFF)
                            throw new InvalidRequestException("Index expression values may not be larger than 64K");
                        expressions.add(new IndexExpression(name.name.key, slice.getIndexOperator(b), value));
                    }
                }
            }
            else
            {
                List<ByteBuffer> values = restriction.values(variables);

                if (values.size() != 1)
                    throw new InvalidRequestException("IN restrictions are not supported on indexed columns");

                ByteBuffer value = values.get(0);
                if (value == null)
                    throw new InvalidRequestException(String.format("Unsupported null value for indexed column %s", name));
                if (value.remaining() > 0xFFFF)
                    throw new InvalidRequestException("Index expression values may not be larger than 64K");
                expressions.add(new IndexExpression(name.name.key, IndexOperator.EQ, value));
            }
        }
        return expressions;
    }
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        return highestSelectivityPredicate(clause) != null;
    }

    protected IndexExpression highestSelectivityPredicate(List<IndexExpression> clause)
    {
        IndexExpression best = null;
        int bestMeanCount = Integer.MAX_VALUE;
        Map<SecondaryIndex, Integer> candidates = new HashMap<>();

        for (IndexExpression expression : clause)
        {
View Full Code Here
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    private ColumnFamilyStore.AbstractScanIterator getIndexedIterator(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 CompositesIndex index = (CompositesIndex)indexManager.getIndexForColumn(primary.column_name);
        assert index != null;
        final DecoratedKey indexKey = index.getIndexKeyFor(primary.value);

        if (logger.isDebugEnabled())
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        {
            // Left and right side of relational expression encoded according to comparator/validator.
            ByteBuffer entity = columnRelation.getEntity().getByteBuffer(metadata.comparator, variables);
            ByteBuffer value = columnRelation.getValue().getByteBuffer(select.getValueValidator(metadata.ksName, entity), variables);

            expressions.add(new IndexExpression(entity,
                                                IndexOperator.valueOf(columnRelation.operator().toString()),
                                                value));
        }

        int limit = select.isKeyRange() && select.getKeyStart() != null
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            int filterCount = in.readInt();
            List<IndexExpression> rowFilter = new ArrayList<IndexExpression>(filterCount);
            for (int i = 0; i < filterCount; i++)
            {
                IndexExpression expr = new IndexExpression(ByteBufferUtil.readWithShortLength(in),
                                                           IndexOperator.findByValue(in.readInt()),
                                                           ByteBufferUtil.readWithShortLength(in));
                rowFilter.add(expr);
            }
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        // confirm that the secondary index was recovered
        for (String key : keys)
        {
            long val = key.hashCode();
            IndexExpression expr = new IndexExpression(ByteBufferUtil.bytes("birthdate"),
                                                              IndexOperator.EQ,
                                                              ByteBufferUtil.bytes(val));
            List<IndexExpression> clause = Arrays.asList(expr);
            IDiskAtomFilter filter = new IdentityQueryFilter();
            Range<RowPosition> range = Util.range("", "");
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                ByteBuffer value = restriction.eqValues.get(0).bindAndGet(variables);
                if (value == null)
                    throw new InvalidRequestException(String.format("Unsupported null value for indexed column %s", name));
                if (value.remaining() > 0xFFFF)
                    throw new InvalidRequestException("Index expression values may not be larger than 64K");
                expressions.add(new IndexExpression(name.name.key, IndexOperator.EQ, value));
            }
            else
            {
                for (Bound b : Bound.values())
                {
                    if (restriction.bound(b) != null)
                    {
                        ByteBuffer value = restriction.bound(b).bindAndGet(variables);
                        if (value == null)
                            throw new InvalidRequestException(String.format("Unsupported null value for indexed column %s", name));
                        if (value.remaining() > 0xFFFF)
                            throw new InvalidRequestException("Index expression values may not be larger than 64K");
                        expressions.add(new IndexExpression(name.name.key, restriction.getIndexOperator(b), value));
                    }
                }
            }
        }
        return expressions;
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