On 13 June 2011 16:14, AJ <a...@dude.podzone.net> wrote: > On 6/13/2011 7:03 AM, Stephen Connolly wrote: >> >> 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? > > I would expect it to not return anything (no row at all) for both of those > cases. Are you saying that an empty row is returned for rows that do not > match the predicate? So, if I perform a range slice where the range is > every row of the CF and the slice equates to no matches and I have 1 million > rows in the CF, then I will get a result set of 1 million empty rows? > No I am saying that for each row that matches, you will get a result, even if the columns that you request happen to be empty for that specific row.
Likewise, any deleted rows in the same row range will show as empty because C* would have a tone of work to figure out the difference between being deleted and being empty.
