Examples of IndexExpression

com.google.dart.engine.ast.IndexExpression
Instances of the class {@code IndexExpression} represent an index expression.
```
 indexExpression ::= {@link Expression target} '[' {@link Expression index} ']'
```
@coverage dart.engine.ast
org.apache.cassandra.db.IndexExpression
org.apache.cassandra.thrift.IndexExpression
org.apache.hadoop.hbase.index.client.IndexExpression
While scan the index(s) to be used can be explicitly passed from client application. Objects of IndexExpression can specify the index(s) details. @see SingleIndexExpression @see MultiIndexExpression @see NoIndexExpression @see Scan#setAttribute(String,byte[]) @see Constants#INDEX_EXPRESSION @see IndexUtils#toBytes(IndexExpression)

Examples of org.apache.cassandra.thrift.IndexExpression

                             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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Examples of org.apache.cassandra.thrift.IndexExpression

    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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Examples of org.apache.cassandra.thrift.IndexExpression

        return rows;
    }


    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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Examples of org.apache.cassandra.thrift.IndexExpression

    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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Examples of org.apache.cassandra.thrift.IndexExpression

                             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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Examples of org.apache.cassandra.thrift.IndexExpression

        // and that the index and filter were properly recovered
        assert null != cfs.getColumnFamily(QueryFilter.getIdentityFilter(Util.dk("key1"), new QueryPath(cfs.columnFamily)));
        assert null != cfs.getColumnFamily(QueryFilter.getIdentityFilter(Util.dk("key3"), new QueryPath(cfs.columnFamily)));


        // and that the secondary index works
        IndexExpression expr = new IndexExpression(ByteBufferUtil.bytes("birthdate"), IndexOperator.EQ, ByteBufferUtil.bytes(3L));
        IndexClause clause = new IndexClause(Arrays.asList(expr), ByteBufferUtil.EMPTY_BYTE_BUFFER, 100);
        IFilter filter = new IdentityQueryFilter();
        Range range = new Range(p.getMinimumToken(), p.getMinimumToken());
        rows = cfs.scan(clause, range, filter);
        assertEquals(1, rows.size());

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Examples of org.apache.cassandra.thrift.IndexExpression


    public List<KeySlice> indexGet(ByteBuffer columnName, ByteBuffer value, ByteBuffer startOffset, int limit, boolean isReverse) throws Exception
    {
        SlicePredicate predicate = new SlicePredicate().setSlice_range(new SliceRange(ByteBufferUtil.EMPTY_BYTE_BUFFER, ByteBufferUtil.EMPTY_BYTE_BUFFER, isReverse, limit));
        ColumnParent parent = new ColumnParent(cfName);
        IndexExpression expression = new IndexExpression(columnName, IndexOperator.EQ, value);
        IndexClause clause = new IndexClause(Arrays.asList(expression), startOffset, limit);
        return client.get_indexed_slices(parent, clause, predicate, cl);
    }

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Examples of org.apache.cassandra.thrift.IndexExpression

                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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Examples of org.apache.cassandra.thrift.IndexExpression

        // 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);
            IDiskAtomFilter filter = new IdentityQueryFilter();
            Range<RowPosition> range = Util.range("", "");

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Examples of org.apache.cassandra.thrift.IndexExpression

        // make sure all sstables including 2ary indexes load from disk
        for (ColumnFamilyStore cfs : indexedCFS.concatWithIndexes())
            clearAndLoad(cfs);


        // query using index to see if sstable for secondary index opens
        IndexExpression expr = new IndexExpression(ByteBufferUtil.bytes("birthdate"), IndexOperator.EQ, ByteBufferUtil.bytes(1L));
        List<IndexExpression> clause = Arrays.asList(expr);
        IPartitioner p = StorageService.getPartitioner();
        Range<RowPosition> range = Util.range("", "");
        List<Row> rows = indexedCFS.search(clause, range, 100, new IdentityQueryFilter());
        assert rows.size() == 1;

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