201 lines
3.3 KiB
Plaintext
201 lines
3.3 KiB
Plaintext
--
|
|
-- PG_LSN
|
|
--
|
|
CREATE TABLE PG_LSN_TBL (f1 pg_lsn);
|
|
-- Largest and smallest input
|
|
INSERT INTO PG_LSN_TBL VALUES ('0/0');
|
|
INSERT INTO PG_LSN_TBL VALUES ('FFFFFFFF/FFFFFFFF');
|
|
-- Incorrect input
|
|
INSERT INTO PG_LSN_TBL VALUES ('G/0');
|
|
ERROR: invalid input syntax for type pg_lsn: "G/0"
|
|
LINE 1: INSERT INTO PG_LSN_TBL VALUES ('G/0');
|
|
^
|
|
INSERT INTO PG_LSN_TBL VALUES ('-1/0');
|
|
ERROR: invalid input syntax for type pg_lsn: "-1/0"
|
|
LINE 1: INSERT INTO PG_LSN_TBL VALUES ('-1/0');
|
|
^
|
|
INSERT INTO PG_LSN_TBL VALUES (' 0/12345678');
|
|
ERROR: invalid input syntax for type pg_lsn: " 0/12345678"
|
|
LINE 1: INSERT INTO PG_LSN_TBL VALUES (' 0/12345678');
|
|
^
|
|
INSERT INTO PG_LSN_TBL VALUES ('ABCD/');
|
|
ERROR: invalid input syntax for type pg_lsn: "ABCD/"
|
|
LINE 1: INSERT INTO PG_LSN_TBL VALUES ('ABCD/');
|
|
^
|
|
INSERT INTO PG_LSN_TBL VALUES ('/ABCD');
|
|
ERROR: invalid input syntax for type pg_lsn: "/ABCD"
|
|
LINE 1: INSERT INTO PG_LSN_TBL VALUES ('/ABCD');
|
|
^
|
|
DROP TABLE PG_LSN_TBL;
|
|
-- Operators
|
|
SELECT '0/16AE7F8' = '0/16AE7F8'::pg_lsn;
|
|
?column?
|
|
----------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT '0/16AE7F8'::pg_lsn != '0/16AE7F7';
|
|
?column?
|
|
----------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT '0/16AE7F7' < '0/16AE7F8'::pg_lsn;
|
|
?column?
|
|
----------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT '0/16AE7F8' > pg_lsn '0/16AE7F7';
|
|
?column?
|
|
----------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT '0/16AE7F7'::pg_lsn - '0/16AE7F8'::pg_lsn;
|
|
?column?
|
|
----------
|
|
-1
|
|
(1 row)
|
|
|
|
SELECT '0/16AE7F8'::pg_lsn - '0/16AE7F7'::pg_lsn;
|
|
?column?
|
|
----------
|
|
1
|
|
(1 row)
|
|
|
|
-- Check btree and hash opclasses
|
|
EXPLAIN (COSTS OFF)
|
|
SELECT DISTINCT (i || '/' || j)::pg_lsn f
|
|
FROM generate_series(1, 10) i,
|
|
generate_series(1, 10) j,
|
|
generate_series(1, 5) k
|
|
WHERE i <= 10 AND j > 0 AND j <= 10
|
|
ORDER BY f;
|
|
QUERY PLAN
|
|
--------------------------------------------------------------------------
|
|
Sort
|
|
Sort Key: (((((i.i)::text || '/'::text) || (j.j)::text))::pg_lsn)
|
|
-> HashAggregate
|
|
Group Key: ((((i.i)::text || '/'::text) || (j.j)::text))::pg_lsn
|
|
-> Nested Loop
|
|
-> Function Scan on generate_series k
|
|
-> Materialize
|
|
-> Nested Loop
|
|
-> Function Scan on generate_series j
|
|
Filter: ((j > 0) AND (j <= 10))
|
|
-> Function Scan on generate_series i
|
|
Filter: (i <= 10)
|
|
(12 rows)
|
|
|
|
SELECT DISTINCT (i || '/' || j)::pg_lsn f
|
|
FROM generate_series(1, 10) i,
|
|
generate_series(1, 10) j,
|
|
generate_series(1, 5) k
|
|
WHERE i <= 10 AND j > 0 AND j <= 10
|
|
ORDER BY f;
|
|
f
|
|
-------
|
|
1/1
|
|
1/2
|
|
1/3
|
|
1/4
|
|
1/5
|
|
1/6
|
|
1/7
|
|
1/8
|
|
1/9
|
|
1/10
|
|
2/1
|
|
2/2
|
|
2/3
|
|
2/4
|
|
2/5
|
|
2/6
|
|
2/7
|
|
2/8
|
|
2/9
|
|
2/10
|
|
3/1
|
|
3/2
|
|
3/3
|
|
3/4
|
|
3/5
|
|
3/6
|
|
3/7
|
|
3/8
|
|
3/9
|
|
3/10
|
|
4/1
|
|
4/2
|
|
4/3
|
|
4/4
|
|
4/5
|
|
4/6
|
|
4/7
|
|
4/8
|
|
4/9
|
|
4/10
|
|
5/1
|
|
5/2
|
|
5/3
|
|
5/4
|
|
5/5
|
|
5/6
|
|
5/7
|
|
5/8
|
|
5/9
|
|
5/10
|
|
6/1
|
|
6/2
|
|
6/3
|
|
6/4
|
|
6/5
|
|
6/6
|
|
6/7
|
|
6/8
|
|
6/9
|
|
6/10
|
|
7/1
|
|
7/2
|
|
7/3
|
|
7/4
|
|
7/5
|
|
7/6
|
|
7/7
|
|
7/8
|
|
7/9
|
|
7/10
|
|
8/1
|
|
8/2
|
|
8/3
|
|
8/4
|
|
8/5
|
|
8/6
|
|
8/7
|
|
8/8
|
|
8/9
|
|
8/10
|
|
9/1
|
|
9/2
|
|
9/3
|
|
9/4
|
|
9/5
|
|
9/6
|
|
9/7
|
|
9/8
|
|
9/9
|
|
9/10
|
|
10/1
|
|
10/2
|
|
10/3
|
|
10/4
|
|
10/5
|
|
10/6
|
|
10/7
|
|
10/8
|
|
10/9
|
|
10/10
|
|
(100 rows)
|
|
|