Examples of org.apache.cassandra.db.filter.IFilter

org.apache.cassandra.db.filter.IFilter
Given an implementation-specific description of what columns to look for, provides methods to extract the desired columns from a Memtable, SSTable, or SuperColumn. Either the get*ColumnIterator methods will be called, or filterSuperColumn, but not both on the same object. QueryFilter takes care of putting the two together if subcolumn filtering needs to be done, based on the querypath that it knows (but that IFilter implementations are oblivious to).

        cfs.addSSTable(sstr);
        cfs.buildSecondaryIndexes(cfs.getSSTables(), cfs.getIndexedColumns());
        
        IndexExpression expr = new IndexExpression(ByteBufferUtil.bytes("birthdate"), IndexOperator.EQ, FBUtilities.toByteBuffer(1L));
        IndexClause clause = new IndexClause(Arrays.asList(expr), FBUtilities.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);
        
        assertEquals("IndexExpression should return two rows on recoverAndOpen", 2, rows.size());

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                // get the raw columns requested, and additional columns for the expressions if necessary
                Row rawRow = rowIterator.next();
                ColumnFamily data = rawRow.cf;


                // roughtly
                IFilter extraFilter = filter.getExtraFilter(data);
                if (extraFilter != null)
                {
                    QueryPath path = new QueryPath(columnFamily);
                    ColumnFamily cf = filter.cfs.getColumnFamily(new QueryFilter(rawRow.key, path, extraFilter));
                    if (cf != null)

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        ColumnFamilyStore hintStore = Table.open(Table.SYSTEM_TABLE).getColumnFamilyStore(HINTS_CF);
        IPartitioner p = StorageService.getPartitioner();
        RowPosition minPos = p.getMinimumToken().minKeyBound();
        Range<RowPosition> range = new Range<RowPosition>(minPos, minPos, p);
        IFilter filter = new NamesQueryFilter(ImmutableSortedSet.<ByteBuffer>of());
        List<Row> rows = hintStore.getRangeSlice(null, range, Integer.MAX_VALUE, filter, null);
        for (Row row : rows)
        {
            Token<?> token = StorageService.getPartitioner().getTokenFactory().fromByteArray(row.key.key);
            InetAddress target = StorageService.instance.getTokenMetadata().getEndpoint(token);

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        assert indexCFS != null;
        DecoratedKey indexKey = indexCFS.partitioner.decorateKey(primary.value);


        // if the slicepredicate doesn't contain all the columns for which we have expressions to evaluate,
        // it needs to be expanded to include those too
        IFilter firstFilter = dataFilter;
        NamesQueryFilter extraFilter = null;
        if (clause.expressions.size() > 1)
        {
            if (dataFilter instanceof SliceQueryFilter)
            {

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        cfs.addSSTable(sstr);
        cfs.buildSecondaryIndexes(cfs.getSSTables(), cfs.getIndexedColumns());
        
        IndexExpression expr = new IndexExpression(ByteBufferUtil.bytes("birthdate"), IndexOperator.EQ, FBUtilities.toByteBuffer(1L));
        IndexClause clause = new IndexClause(Arrays.asList(expr), FBUtilities.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);
        
        assertEquals("IndexExpression should return two rows on recoverAndOpen", 2, rows.size());

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Related Classes of org.apache.cassandra.db.filter.IFilter

org.apache.cassandra.db.CleanupTest

org.apache.cassandra.db.ColumnFamilyStore

org.apache.cassandra.db.HintedHandOffManager

org.apache.cassandra.db.RangeSliceCommandSerializer

org.apache.cassandra.io.sstable.SSTableWriterTest

org.apache.cassandra.service.RangeSliceVerbHandler

org.apache.cassandra.streaming.StreamingTransferTest

org.apache.cassandra.thrift.CassandraServer

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