Just got a report on IRC of a bug in the array version of
percentile_cont; if two of the requested percentiles were between the
same pair of input rows, the result could be wrong or an error would
be generated.
e.g.
select percentile_cont(array[0.4,0.6]) within group (order by gs)
from generate_series(1,2) gs;
ERROR: missing row in percentile_cont
Proposed patch (against current master) attached.
--
Andrew (irc:RhodiumToad)
