-- Regression test for the count check in tdigest_add_double_count(), the
-- transition function of the aggregates accepting an explicit number of
-- occurrences of a value.
--
-- The count says how many times the value is added to the digest, so it
-- has to be a positive value.
\set VERBOSITY terse
-- zero count
SELECT tdigest(v, 0::bigint, 100) FROM (VALUES (1.0)) AS t(v);
ERROR:  invalid count value 0, must be a positive value
-- negative count
SELECT tdigest(v, -1::bigint, 100) FROM (VALUES (1.0)) AS t(v);
ERROR:  invalid count value -1, must be a positive value
-- the smallest valid count has to work
SELECT tdigest(v, 1::bigint, 100) FROM (VALUES (1.0)) AS t(v);
                      tdigest                       
----------------------------------------------------
 flags 1 count 1 compression 100 centroids 1 (1, 1)
(1 row)

-- NULL count means a single occurrence, so it's valid too
SELECT tdigest(v, NULL::bigint, 100) FROM (VALUES (1.0)) AS t(v);
                      tdigest                       
----------------------------------------------------
 flags 1 count 1 compression 100 centroids 1 (1, 1)
(1 row)