You're going to have a problem doing this in a single query because you're asking cassandra to select a non-contiguous set of rows. Also, to my knowledge, you can only use non equal operators on clustering keys. The best solution I could come up with would be to define you table like so:
Hi,According to the documentation on Indexes ( http://www.datastax.com/docs/1.1/ddl/indexes ),in order to use WHERE on a column which is not part of my key, I must define a secondary index on it. However, I can only use equality comparison on it but I wish to use other comparisons methods like greater than.Let's say I have a room with people and every timestamp, I measure the temperature of the room and number of people. I use the timestamp as my key and I want to select all timestamps where temperature was over 50 degrees but I can't seem to be able to do it with a regular query even if I define that column as a secondary index.SELECT * FROM MyTable WHERE temp > 50.4571;
My lame workaround is to define a secondary index on NumOfPeopleInRoom and than for a specific valueSELECT * FROM MyTable WHERE NumOfPeopleInRoom = 7 AND temp > 50.4571;I'm pretty sure this is not the proper way for me to do this.How should I attack this? It feels like I'm missing a very basic concept.I'd appreciate it if your answers include also the option of not changing my schema.Thanks!!!