You could simulate it thoug. Just Add some Meta Column with a boolean Value indicating if the referred Column is in the Row or Not. Then Add an Index in that Meta Column and query for it. I. E. Row a: (c=1234),(has_c=Yes) Quert : List cf where has_c=Yes
Am 06.04.2011 um 18:52 schrieb "Jonathan Ellis" <jbel...@gmail.com>: > No, 0.7 indexes handle equality queries; you're basically asking for a > IS NOT NULL query. > > On Wed, Apr 6, 2011 at 11:23 AM, Jeremiah Jordan > <jeremiah.jor...@morningstar.com> wrote: >> In 0.7.X is there a way to have an automatic secondary index >> which keeps track of what keys contain a certain column? Right now we >> are keeping track of this manually, so we can quickly get all of the >> rows which contain a given column, it would be nice if it was automatic. >> >> -Jeremiah >> >> ________________________________ >> Jeremiah Jordan >> Application Developer >> Morningstar, Inc. >> >> Morningstar. Illuminating investing worldwide. >> >> +1 312 696-6128 voice >> jeremiah.jor...@morningstar.com >> >> www.morningstar.com >> >> This e-mail contains privileged and confidential information and is >> intended only for the use of the person(s) named above. Any >> dissemination, distribution, or duplication of this communication >> without prior written consent from Morningstar is strictly prohibited. >> If you have received this message in error, please contact the sender >> immediately and delete the materials from any computer. >> > > > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of DataStax, the source for professional Cassandra support > http://www.datastax.com >
