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--
-- num_nulls()
--
SELECT num_nonnulls(NULL);
num_nonnulls
--------------
0
(1 row)
SELECT num_nonnulls('1');
num_nonnulls
--------------
1
(1 row)
SELECT num_nonnulls(NULL::text);
num_nonnulls
--------------
0
(1 row)
SELECT num_nonnulls(NULL::text, NULL::int);
num_nonnulls
--------------
0
(1 row)
SELECT num_nonnulls(1, 2, NULL::text, NULL::point, '', int8 '9', 1.0 / NULL);
num_nonnulls
--------------
4
(1 row)
SELECT num_nonnulls(VARIADIC '{1,2,NULL,3}'::int[]);
num_nonnulls
--------------
3
(1 row)
SELECT num_nonnulls(VARIADIC '{"1","2","3","4"}'::text[]);
num_nonnulls
--------------
4
(1 row)
SELECT num_nonnulls(VARIADIC ARRAY(SELECT CASE WHEN i <> 40 THEN i END FROM generate_series(1, 100) i));
num_nonnulls
--------------
99
(1 row)
SELECT num_nulls(NULL);
num_nulls
-----------
1
(1 row)
SELECT num_nulls('1');
num_nulls
-----------
0
(1 row)
SELECT num_nulls(NULL::text);
num_nulls
-----------
1
(1 row)
SELECT num_nulls(NULL::text, NULL::int);
num_nulls
-----------
2
(1 row)
SELECT num_nulls(1, 2, NULL::text, NULL::point, '', int8 '9', 1.0 / NULL);
num_nulls
-----------
3
(1 row)
SELECT num_nulls(VARIADIC '{1,2,NULL,3}'::int[]);
num_nulls
-----------
1
(1 row)
SELECT num_nulls(VARIADIC '{"1","2","3","4"}'::text[]);
num_nulls
-----------
0
(1 row)
SELECT num_nulls(VARIADIC ARRAY(SELECT CASE WHEN i <> 40 THEN i END FROM generate_series(1, 100) i));
num_nulls
-----------
1
(1 row)
-- special cases
SELECT num_nonnulls(VARIADIC NULL::text[]);
num_nonnulls
--------------
(1 row)
SELECT num_nonnulls(VARIADIC '{}'::int[]);
num_nonnulls
--------------
0
(1 row)
SELECT num_nulls(VARIADIC NULL::text[]);
num_nulls
-----------
(1 row)
SELECT num_nulls(VARIADIC '{}'::int[]);
num_nulls
-----------
0
(1 row)
-- should fail, one or more arguments is required
SELECT num_nonnulls();
ERROR: function num_nonnulls() does not exist
LINE 1: SELECT num_nonnulls();
^
HINT: No function matches the given name and argument types. You might need to add explicit type casts.
SELECT num_nulls();
ERROR: function num_nulls() does not exist
LINE 1: SELECT num_nulls();
^
HINT: No function matches the given name and argument types. You might need to add explicit type casts.
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