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Diffstat (limited to 'src/test/regress/expected/misc_functions.out')
| -rw-r--r-- | src/test/regress/expected/misc_functions.out | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/src/test/regress/expected/misc_functions.out b/src/test/regress/expected/misc_functions.out new file mode 100644 index 0000000..d3acb98 --- /dev/null +++ b/src/test/regress/expected/misc_functions.out @@ -0,0 +1,263 @@ +-- +-- 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. +-- +-- Test some built-in SRFs +-- +-- The outputs of these are variable, so we can't just print their results +-- directly, but we can at least verify that the code doesn't fail. +-- +select setting as segsize +from pg_settings where name = 'wal_segment_size' +\gset +select count(*) > 0 as ok from pg_ls_waldir(); + ok +---- + t +(1 row) + +-- Test ProjectSet as well as FunctionScan +select count(*) > 0 as ok from (select pg_ls_waldir()) ss; + ok +---- + t +(1 row) + +-- Test not-run-to-completion cases. +select * from pg_ls_waldir() limit 0; + name | size | modification +------+------+-------------- +(0 rows) + +select count(*) > 0 as ok from (select * from pg_ls_waldir() limit 1) ss; + ok +---- + t +(1 row) + +select (w).size = :segsize as ok +from (select pg_ls_waldir() w) ss where length((w).name) = 24 limit 1; + ok +---- + t +(1 row) + +select count(*) >= 0 as ok from pg_ls_archive_statusdir(); + ok +---- + t +(1 row) + +select * from (select pg_ls_dir('.') a) a where a = 'base' limit 1; + a +------ + base +(1 row) + +select * from (select (pg_timezone_names()).name) ptn where name='UTC' limit 1; + name +------ + UTC +(1 row) + +select count(*) > 0 from + (select pg_tablespace_databases(oid) as pts from pg_tablespace + where spcname = 'pg_default') pts + join pg_database db on pts.pts = db.oid; + ?column? +---------- + t +(1 row) + +-- +-- Test adding a support function to a subject function +-- +CREATE FUNCTION my_int_eq(int, int) RETURNS bool + LANGUAGE internal STRICT IMMUTABLE PARALLEL SAFE + AS $$int4eq$$; +-- By default, planner does not think that's selective +EXPLAIN (COSTS OFF) +SELECT * FROM tenk1 a JOIN tenk1 b ON a.unique1 = b.unique1 +WHERE my_int_eq(a.unique2, 42); + QUERY PLAN +---------------------------------------------- + Hash Join + Hash Cond: (b.unique1 = a.unique1) + -> Seq Scan on tenk1 b + -> Hash + -> Seq Scan on tenk1 a + Filter: my_int_eq(unique2, 42) +(6 rows) + +-- With support function that knows it's int4eq, we get a different plan +ALTER FUNCTION my_int_eq(int, int) SUPPORT test_support_func; +EXPLAIN (COSTS OFF) +SELECT * FROM tenk1 a JOIN tenk1 b ON a.unique1 = b.unique1 +WHERE my_int_eq(a.unique2, 42); + QUERY PLAN +------------------------------------------------- + Nested Loop + -> Seq Scan on tenk1 a + Filter: my_int_eq(unique2, 42) + -> Index Scan using tenk1_unique1 on tenk1 b + Index Cond: (unique1 = a.unique1) +(5 rows) + +-- Also test non-default rowcount estimate +CREATE FUNCTION my_gen_series(int, int) RETURNS SETOF integer + LANGUAGE internal STRICT IMMUTABLE PARALLEL SAFE + AS $$generate_series_int4$$ + SUPPORT test_support_func; +EXPLAIN (COSTS OFF) +SELECT * FROM tenk1 a JOIN my_gen_series(1,1000) g ON a.unique1 = g; + QUERY PLAN +---------------------------------------- + Hash Join + Hash Cond: (g.g = a.unique1) + -> Function Scan on my_gen_series g + -> Hash + -> Seq Scan on tenk1 a +(5 rows) + +EXPLAIN (COSTS OFF) +SELECT * FROM tenk1 a JOIN my_gen_series(1,10) g ON a.unique1 = g; + QUERY PLAN +------------------------------------------------- + Nested Loop + -> Function Scan on my_gen_series g + -> Index Scan using tenk1_unique1 on tenk1 a + Index Cond: (unique1 = g.g) +(4 rows) + |