This is covered in http://www.datastax.com/dev/blog/whats-new-cassandra-07-secondary-indexes
On Sat, Aug 13, 2011 at 2:49 PM, Jens Hartung <ho...@gmx.de> wrote: > Hi together, > > first, I'm using Cassandra Version 0.8.4 and access it via CQL 1.0.3. > > When I select data from Cassandra with = in WHERE clause, everything works > fine, but when using <= or < in WHERE clause, I always get following > Exception: > > java.sql.SQLException: No indexed columns present in by-columns clause with > "equals" operator > at > org.apache.cassandra.cql.jdbc.CassandraStatement.executeQuery(CassandraStatement.java:242) > at > columnfamily.queries.CassandraQueries.singleColumnSelect(CassandraQueries.java:147) > ... > > My select-statement: "SELECT number FROM station WHERE number <= 8210;" > > Output of describe keyspace (within cli): > ColumnFamily: station > Key Validation Class: org.apache.cassandra.db.marshal.UTF8Type > Default column value validator: org.apache.cassandra.db.marshal.UTF8Type > Columns sorted by: org.apache.cassandra.db.marshal.UTF8Type > Row cache size / save period in seconds: 0.0/0 > Key cache size / save period in seconds: 200000.0/14400 > Memtable thresholds: 0.2109375/1440/45 (millions of ops/minutes/MB) > GC grace seconds: 864000 > Compaction min/max thresholds: 4/32 > Read repair chance: 1.0 > Replicate on write: true > Built indexes: [station.station_number_idx] > Column Metadata: > [...] > Column Name: number > Validation Class: org.apache.cassandra.db.marshal.LongType > Index Name: station_number_idx > Index Type: KEYS > [...] > > Are the <, <=, >=, > operators not supported at this time? > > Greetings > Jens > -- > NEU: FreePhone - 0ct/min Handyspartarif mit Geld-zurück-Garantie! > Jetzt informieren: http://www.gmx.net/de/go/freephone > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
