-- regression test for the uuid datatype
-- creating test tables
CREATE TABLE guid1
(
	guid_field UUID,
	text_field TEXT DEFAULT(now())
);
CREATE TABLE guid2
(
	guid_field UUID,
	text_field TEXT DEFAULT(now())
);
CREATE TABLE guid3
(
	id SERIAL,
	guid_field UUID
);
-- inserting invalid data tests
-- too long
INSERT INTO guid1(guid_field) VALUES('11111111-1111-1111-1111-111111111111F');
ERROR:  invalid input syntax for type uuid: "11111111-1111-1111-1111-111111111111F"
LINE 1: INSERT INTO guid1(guid_field) VALUES('11111111-1111-1111-111...
                                             ^
-- too short
INSERT INTO guid1(guid_field) VALUES('{11111111-1111-1111-1111-11111111111}');
ERROR:  invalid input syntax for type uuid: "{11111111-1111-1111-1111-11111111111}"
LINE 1: INSERT INTO guid1(guid_field) VALUES('{11111111-1111-1111-11...
                                             ^
-- valid data but invalid format
INSERT INTO guid1(guid_field) VALUES('111-11111-1111-1111-1111-111111111111');
ERROR:  invalid input syntax for type uuid: "111-11111-1111-1111-1111-111111111111"
LINE 1: INSERT INTO guid1(guid_field) VALUES('111-11111-1111-1111-11...
                                             ^
INSERT INTO guid1(guid_field) VALUES('{22222222-2222-2222-2222-222222222222 ');
ERROR:  invalid input syntax for type uuid: "{22222222-2222-2222-2222-222222222222 "
LINE 1: INSERT INTO guid1(guid_field) VALUES('{22222222-2222-2222-22...
                                             ^
-- invalid data
INSERT INTO guid1(guid_field) VALUES('11111111-1111-1111-G111-111111111111');
ERROR:  invalid input syntax for type uuid: "11111111-1111-1111-G111-111111111111"
LINE 1: INSERT INTO guid1(guid_field) VALUES('11111111-1111-1111-G11...
                                             ^
INSERT INTO guid1(guid_field) VALUES('11+11111-1111-1111-1111-111111111111');
ERROR:  invalid input syntax for type uuid: "11+11111-1111-1111-1111-111111111111"
LINE 1: INSERT INTO guid1(guid_field) VALUES('11+11111-1111-1111-111...
                                             ^
-- test non-error-throwing API
SELECT pg_input_is_valid('11', 'uuid');
 pg_input_is_valid 
-------------------
 f
(1 row)

SELECT * FROM pg_input_error_info('11', 'uuid');
                 message                  | detail | hint | sql_error_code 
------------------------------------------+--------+------+----------------
 invalid input syntax for type uuid: "11" |        |      | 22P02
(1 row)

--inserting three input formats
INSERT INTO guid1(guid_field) VALUES('11111111-1111-1111-1111-111111111111');
INSERT INTO guid1(guid_field) VALUES('{22222222-2222-2222-2222-222222222222}');
INSERT INTO guid1(guid_field) VALUES('3f3e3c3b3a3039383736353433a2313e');
-- retrieving the inserted data
SELECT guid_field FROM guid1;
              guid_field              
--------------------------------------
 11111111-1111-1111-1111-111111111111
 22222222-2222-2222-2222-222222222222
 3f3e3c3b-3a30-3938-3736-353433a2313e
(3 rows)

-- ordering test
SELECT guid_field FROM guid1 ORDER BY guid_field ASC;
              guid_field              
--------------------------------------
 11111111-1111-1111-1111-111111111111
 22222222-2222-2222-2222-222222222222
 3f3e3c3b-3a30-3938-3736-353433a2313e
(3 rows)

SELECT guid_field FROM guid1 ORDER BY guid_field DESC;
              guid_field              
--------------------------------------
 3f3e3c3b-3a30-3938-3736-353433a2313e
 22222222-2222-2222-2222-222222222222
 11111111-1111-1111-1111-111111111111
(3 rows)

-- = operator test
SELECT COUNT(*) FROM guid1 WHERE guid_field = '3f3e3c3b-3a30-3938-3736-353433a2313e';
 count 
-------
     1
(1 row)

-- <> operator test
SELECT COUNT(*) FROM guid1 WHERE guid_field <> '11111111111111111111111111111111';
 count 
-------
     2
(1 row)

-- < operator test
SELECT COUNT(*) FROM guid1 WHERE guid_field < '22222222-2222-2222-2222-222222222222';
 count 
-------
     1
(1 row)

-- <= operator test
SELECT COUNT(*) FROM guid1 WHERE guid_field <= '22222222-2222-2222-2222-222222222222';
 count 
-------
     2
(1 row)

-- > operator test
SELECT COUNT(*) FROM guid1 WHERE guid_field > '22222222-2222-2222-2222-222222222222';
 count 
-------
     1
(1 row)

-- >= operator test
SELECT COUNT(*) FROM guid1 WHERE guid_field >= '22222222-2222-2222-2222-222222222222';
 count 
-------
     2
(1 row)

-- btree and hash index creation test
CREATE INDEX guid1_btree ON guid1 USING BTREE (guid_field);
CREATE INDEX guid1_hash  ON guid1 USING HASH  (guid_field);
-- unique index test
CREATE UNIQUE INDEX guid1_unique_BTREE ON guid1 USING BTREE (guid_field);
EXPLAIN (COSTS OFF)
SELECT COUNT(*) FROM guid1 WHERE guid_field <> '11111111111111111111111111111111' OR
							guid_field <> '3f3e3c3b-3a30-3938-3736-353433a2313e';
                                                                   QUERY PLAN                                                                   
------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate
   ->  Seq Scan on guid1
         Filter: ((guid_field <> '11111111-1111-1111-1111-111111111111'::uuid) OR (guid_field <> '3f3e3c3b-3a30-3938-3736-353433a2313e'::uuid))
(3 rows)

EXPLAIN (COSTS OFF)
SELECT COUNT(*) FROM guid1 WHERE guid_field <= '22222222-2222-2222-2222-222222222222' OR
									guid_field <= '11111111111111111111111111111111' OR
									guid_field <= '3f3e3c3b-3a30-3938-3736-353433a2313e';
                                                                                                   QUERY PLAN                                                                                                   
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate
   ->  Seq Scan on guid1
         Filter: ((guid_field <= '22222222-2222-2222-2222-222222222222'::uuid) OR (guid_field <= '11111111-1111-1111-1111-111111111111'::uuid) OR (guid_field <= '3f3e3c3b-3a30-3938-3736-353433a2313e'::uuid))
(3 rows)

EXPLAIN (COSTS OFF)
SELECT COUNT(*) FROM guid1 WHERE guid_field = '3f3e3c3b-3a30-3938-3736-353433a2313e' OR
							guid_field = '11111111111111111111111111111111';
                                                                  QUERY PLAN                                                                  
----------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate
   ->  Seq Scan on guid1
         Filter: ((guid_field = '3f3e3c3b-3a30-3938-3736-353433a2313e'::uuid) OR (guid_field = '11111111-1111-1111-1111-111111111111'::uuid))
(3 rows)

-- should fail
INSERT INTO guid1(guid_field) VALUES('11111111-1111-1111-1111-111111111111');
ERROR:  duplicate key value violates unique constraint "guid1_unique_btree"
DETAIL:  Key (guid_field)=(11111111-1111-1111-1111-111111111111) already exists.
-- check to see whether the new indexes are actually there
SELECT count(*) FROM pg_class WHERE relkind='i' AND relname LIKE 'guid%';
 count 
-------
     3
(1 row)

-- populating the test tables with additional records
INSERT INTO guid1(guid_field) VALUES('44444444-4444-4444-4444-444444444444');
INSERT INTO guid2(guid_field) VALUES('11111111-1111-1111-1111-111111111111');
INSERT INTO guid2(guid_field) VALUES('{22222222-2222-2222-2222-222222222222}');
INSERT INTO guid2(guid_field) VALUES('3f3e3c3b3a3039383736353433a2313e');
-- join test
SELECT COUNT(*) FROM guid1 g1 INNER JOIN guid2 g2 ON g1.guid_field = g2.guid_field;
 count 
-------
     3
(1 row)

SELECT COUNT(*) FROM guid1 g1 LEFT JOIN guid2 g2 ON g1.guid_field = g2.guid_field WHERE g2.guid_field IS NULL;
 count 
-------
     1
(1 row)

-- generation test
TRUNCATE guid1;
INSERT INTO guid1 (guid_field) VALUES (gen_random_uuid());
INSERT INTO guid1 (guid_field) VALUES (gen_random_uuid());
SELECT count(DISTINCT guid_field) FROM guid1;
 count 
-------
     2
(1 row)

-- test of uuidv4() alias
TRUNCATE guid1;
INSERT INTO guid1 (guid_field) VALUES (uuidv4());
INSERT INTO guid1 (guid_field) VALUES (uuidv4());
SELECT count(DISTINCT guid_field) FROM guid1;
 count 
-------
     2
(1 row)

-- generation test for v7
TRUNCATE guid1;
INSERT INTO guid1 (guid_field) VALUES (uuidv7());
INSERT INTO guid1 (guid_field) VALUES (uuidv7());
INSERT INTO guid1 (guid_field) VALUES (uuidv7(INTERVAL '1 day'));
SELECT count(DISTINCT guid_field) FROM guid1;
 count 
-------
     3
(1 row)

-- test sortability of v7
INSERT INTO guid3 (guid_field) SELECT uuidv7() FROM generate_series(1, 10);
SELECT array_agg(id ORDER BY guid_field) FROM guid3;
       array_agg        
------------------------
 {1,2,3,4,5,6,7,8,9,10}
(1 row)

-- Check the timestamp offsets for v7.
--
-- generate UUIDv7 values with timestamps ranging from 1970 (the Unix epoch year)
-- to 10888 (one year before the maximum possible year), and then verify that
-- the extracted timestamps from these UUIDv7 values have not overflowed.
WITH uuidts AS (
    SELECT y, ts as ts, lag(ts) OVER (ORDER BY y) AS prev_ts
    FROM (SELECT y, uuid_extract_timestamp(uuidv7((y || ' years')::interval)) AS ts
        FROM generate_series(1970 - extract(year from now())::int, 10888 - extract(year from now())::int) y)
)
SELECT y, ts, prev_ts FROM uuidts WHERE ts < prev_ts;
 y | ts | prev_ts 
---+----+---------
(0 rows)

-- extract functions
-- version
SELECT uuid_extract_version('11111111-1111-5111-8111-111111111111');  -- 5
 uuid_extract_version 
----------------------
                    5
(1 row)

SELECT uuid_extract_version(gen_random_uuid());  -- 4
 uuid_extract_version 
----------------------
                    4
(1 row)

SELECT uuid_extract_version('11111111-1111-1111-1111-111111111111');  -- null
 uuid_extract_version 
----------------------
                     
(1 row)

SELECT uuid_extract_version(uuidv4());  -- 4
 uuid_extract_version 
----------------------
                    4
(1 row)

SELECT uuid_extract_version(uuidv7());  -- 7
 uuid_extract_version 
----------------------
                    7
(1 row)

-- timestamp
SELECT uuid_extract_timestamp('C232AB00-9414-11EC-B3C8-9F6BDECED846') = 'Tuesday, February 22, 2022 2:22:22.00 PM GMT+05:00';  -- RFC 9562 test vector for v1
 ?column? 
----------
 t
(1 row)

SELECT uuid_extract_timestamp('017F22E2-79B0-7CC3-98C4-DC0C0C07398F') = 'Tuesday, February 22, 2022 2:22:22.00 PM GMT+05:00';  -- RFC 9562 test vector for v7
 ?column? 
----------
 t
(1 row)

SELECT uuid_extract_timestamp(gen_random_uuid());  -- null
 uuid_extract_timestamp 
------------------------
 
(1 row)

SELECT uuid_extract_timestamp('11111111-1111-1111-1111-111111111111');  -- null
 uuid_extract_timestamp 
------------------------
 
(1 row)

-- clean up
DROP TABLE guid1, guid2, guid3 CASCADE;