It returns the set of columns for the set of rows... how do you determine the difference between a completely empty row and a row that just does not have any of the matching columns?
Well the answer is that Cassandra does not go and check whether there are any columns outside of the range you are querying, so it will just return the empty (for the column range you specified) row.... your code needs to be robust enough to be able to understand that an empty list of columns does not imply that there are no columns at all for that row key (i.e. it is deleted and waiting tombstone expiry & gc) or there is a column outside the range you queried. On 13 June 2011 13:59, AJ <a...@dude.podzone.net> wrote: > http://wiki.apache.org/cassandra/FAQ#range_ghosts > > "So to special case leaving out result entries for deletions, we would have > to check the entire rest of the row to make sure there is no undeleted data > anywhere else either (in which case leaving the key out would be an error)." > > The above doesn't read well and I don't get it. Can anyone rephrase it or > elaborate? > > Thanks! >
