-- Regression test for a NULL "count" argument in the transition functions
-- accepting an explicit number of occurrences of a value.
--
-- The count argument is not required to be non-NULL, and a NULL count is
-- interpreted as a single occurrence of the value - exactly like the
-- variants without the count argument.
-- tdigest_add_double_values_count
SELECT tdigest_percentile_of(v, NULL::bigint, 100, 1.0) FROM (VALUES (1.0), (2.0)) AS t(v);
 tdigest_percentile_of 
-----------------------
                  0.25
(1 row)

SELECT tdigest_percentile_of(v, 1::bigint, 100, 1.0) FROM (VALUES (1.0), (2.0)) AS t(v);
 tdigest_percentile_of 
-----------------------
                  0.25
(1 row)

-- tdigest_add_double_array_count
SELECT tdigest_percentile(v, NULL::bigint, 100, ARRAY[0.5]) FROM (VALUES (1.0), (2.0)) AS t(v);
 tdigest_percentile 
--------------------
 {1.5}
(1 row)

SELECT tdigest_percentile(v, 1::bigint, 100, ARRAY[0.5]) FROM (VALUES (1.0), (2.0)) AS t(v);
 tdigest_percentile 
--------------------
 {1.5}
(1 row)

-- tdigest_add_double_array_values_count
SELECT tdigest_percentile_of(v, NULL::bigint, 100, ARRAY[1.0]) FROM (VALUES (1.0), (2.0)) AS t(v);
 tdigest_percentile_of 
-----------------------
 {0.25}
(1 row)

SELECT tdigest_percentile_of(v, 1::bigint, 100, ARRAY[1.0]) FROM (VALUES (1.0), (2.0)) AS t(v);
 tdigest_percentile_of 
-----------------------
 {0.25}
(1 row)

-- tdigest_add_double_count_trimmed
SELECT tdigest_avg(v, NULL::bigint, 100, 0.0, 1.0) FROM (VALUES (1.0), (2.0)) AS t(v);
 tdigest_avg 
-------------
         1.5
(1 row)

SELECT tdigest_avg(v, 1::bigint, 100, 0.0, 1.0) FROM (VALUES (1.0), (2.0)) AS t(v);
 tdigest_avg 
-------------
         1.5
(1 row)

-- tdigest_add_digest_trimmed has no count argument - the counts come from
-- the centroids of the digest - so the closest equivalent is a NULL digest,
-- which contributes no values at all
SELECT tdigest_avg(d, 0.0, 1.0) FROM (VALUES (NULL::tdigest), (NULL)) AS t(d);
 tdigest_avg 
-------------
            
(1 row)

SELECT tdigest_avg(d, 0.0, 1.0)
  FROM (VALUES ('flags 1 count 2 compression 100 centroids 2 (1, 1) (2, 1)'::tdigest),
               (NULL),
               ('flags 1 count 2 compression 100 centroids 2 (3, 1) (4, 1)'::tdigest)) AS t(d);
 tdigest_avg 
-------------
         2.5
(1 row)