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|
--
-- INT4
--
CREATE TABLE INT4_TBL(f1 int4);
INSERT INTO INT4_TBL(f1) VALUES (' 0 ');
INSERT INTO INT4_TBL(f1) VALUES ('123456 ');
INSERT INTO INT4_TBL(f1) VALUES (' -123456');
INSERT INTO INT4_TBL(f1) VALUES ('34.5');
ERROR: invalid input syntax for type integer: "34.5"
LINE 1: INSERT INTO INT4_TBL(f1) VALUES ('34.5');
^
-- largest and smallest values
INSERT INTO INT4_TBL(f1) VALUES ('2147483647');
INSERT INTO INT4_TBL(f1) VALUES ('-2147483647');
-- bad input values -- should give errors
INSERT INTO INT4_TBL(f1) VALUES ('1000000000000');
ERROR: value "1000000000000" is out of range for type integer
LINE 1: INSERT INTO INT4_TBL(f1) VALUES ('1000000000000');
^
INSERT INTO INT4_TBL(f1) VALUES ('asdf');
ERROR: invalid input syntax for type integer: "asdf"
LINE 1: INSERT INTO INT4_TBL(f1) VALUES ('asdf');
^
INSERT INTO INT4_TBL(f1) VALUES (' ');
ERROR: invalid input syntax for type integer: " "
LINE 1: INSERT INTO INT4_TBL(f1) VALUES (' ');
^
INSERT INTO INT4_TBL(f1) VALUES (' asdf ');
ERROR: invalid input syntax for type integer: " asdf "
LINE 1: INSERT INTO INT4_TBL(f1) VALUES (' asdf ');
^
INSERT INTO INT4_TBL(f1) VALUES ('- 1234');
ERROR: invalid input syntax for type integer: "- 1234"
LINE 1: INSERT INTO INT4_TBL(f1) VALUES ('- 1234');
^
INSERT INTO INT4_TBL(f1) VALUES ('123 5');
ERROR: invalid input syntax for type integer: "123 5"
LINE 1: INSERT INTO INT4_TBL(f1) VALUES ('123 5');
^
INSERT INTO INT4_TBL(f1) VALUES ('');
ERROR: invalid input syntax for type integer: ""
LINE 1: INSERT INTO INT4_TBL(f1) VALUES ('');
^
SELECT * FROM INT4_TBL;
f1
-------------
0
123456
-123456
2147483647
-2147483647
(5 rows)
SELECT i.* FROM INT4_TBL i WHERE i.f1 <> int2 '0';
f1
-------------
123456
-123456
2147483647
-2147483647
(4 rows)
SELECT i.* FROM INT4_TBL i WHERE i.f1 <> int4 '0';
f1
-------------
123456
-123456
2147483647
-2147483647
(4 rows)
SELECT i.* FROM INT4_TBL i WHERE i.f1 = int2 '0';
f1
----
0
(1 row)
SELECT i.* FROM INT4_TBL i WHERE i.f1 = int4 '0';
f1
----
0
(1 row)
SELECT i.* FROM INT4_TBL i WHERE i.f1 < int2 '0';
f1
-------------
-123456
-2147483647
(2 rows)
SELECT i.* FROM INT4_TBL i WHERE i.f1 < int4 '0';
f1
-------------
-123456
-2147483647
(2 rows)
SELECT i.* FROM INT4_TBL i WHERE i.f1 <= int2 '0';
f1
-------------
0
-123456
-2147483647
(3 rows)
SELECT i.* FROM INT4_TBL i WHERE i.f1 <= int4 '0';
f1
-------------
0
-123456
-2147483647
(3 rows)
SELECT i.* FROM INT4_TBL i WHERE i.f1 > int2 '0';
f1
------------
123456
2147483647
(2 rows)
SELECT i.* FROM INT4_TBL i WHERE i.f1 > int4 '0';
f1
------------
123456
2147483647
(2 rows)
SELECT i.* FROM INT4_TBL i WHERE i.f1 >= int2 '0';
f1
------------
0
123456
2147483647
(3 rows)
SELECT i.* FROM INT4_TBL i WHERE i.f1 >= int4 '0';
f1
------------
0
123456
2147483647
(3 rows)
-- positive odds
SELECT i.* FROM INT4_TBL i WHERE (i.f1 % int2 '2') = int2 '1';
f1
------------
2147483647
(1 row)
-- any evens
SELECT i.* FROM INT4_TBL i WHERE (i.f1 % int4 '2') = int2 '0';
f1
---------
0
123456
-123456
(3 rows)
SELECT i.f1, i.f1 * int2 '2' AS x FROM INT4_TBL i;
ERROR: integer out of range
SELECT i.f1, i.f1 * int2 '2' AS x FROM INT4_TBL i
WHERE abs(f1) < 1073741824;
f1 | x
---------+---------
0 | 0
123456 | 246912
-123456 | -246912
(3 rows)
SELECT i.f1, i.f1 * int4 '2' AS x FROM INT4_TBL i;
ERROR: integer out of range
SELECT i.f1, i.f1 * int4 '2' AS x FROM INT4_TBL i
WHERE abs(f1) < 1073741824;
f1 | x
---------+---------
0 | 0
123456 | 246912
-123456 | -246912
(3 rows)
SELECT i.f1, i.f1 + int2 '2' AS x FROM INT4_TBL i;
ERROR: integer out of range
SELECT i.f1, i.f1 + int2 '2' AS x FROM INT4_TBL i
WHERE f1 < 2147483646;
f1 | x
-------------+-------------
0 | 2
123456 | 123458
-123456 | -123454
-2147483647 | -2147483645
(4 rows)
SELECT i.f1, i.f1 + int4 '2' AS x FROM INT4_TBL i;
ERROR: integer out of range
SELECT i.f1, i.f1 + int4 '2' AS x FROM INT4_TBL i
WHERE f1 < 2147483646;
f1 | x
-------------+-------------
0 | 2
123456 | 123458
-123456 | -123454
-2147483647 | -2147483645
(4 rows)
SELECT i.f1, i.f1 - int2 '2' AS x FROM INT4_TBL i;
ERROR: integer out of range
SELECT i.f1, i.f1 - int2 '2' AS x FROM INT4_TBL i
WHERE f1 > -2147483647;
f1 | x
------------+------------
0 | -2
123456 | 123454
-123456 | -123458
2147483647 | 2147483645
(4 rows)
SELECT i.f1, i.f1 - int4 '2' AS x FROM INT4_TBL i;
ERROR: integer out of range
SELECT i.f1, i.f1 - int4 '2' AS x FROM INT4_TBL i
WHERE f1 > -2147483647;
f1 | x
------------+------------
0 | -2
123456 | 123454
-123456 | -123458
2147483647 | 2147483645
(4 rows)
SELECT i.f1, i.f1 / int2 '2' AS x FROM INT4_TBL i;
f1 | x
-------------+-------------
0 | 0
123456 | 61728
-123456 | -61728
2147483647 | 1073741823
-2147483647 | -1073741823
(5 rows)
SELECT i.f1, i.f1 / int4 '2' AS x FROM INT4_TBL i;
f1 | x
-------------+-------------
0 | 0
123456 | 61728
-123456 | -61728
2147483647 | 1073741823
-2147483647 | -1073741823
(5 rows)
--
-- more complex expressions
--
-- variations on unary minus parsing
SELECT -2+3 AS one;
one
-----
1
(1 row)
SELECT 4-2 AS two;
two
-----
2
(1 row)
SELECT 2- -1 AS three;
three
-------
3
(1 row)
SELECT 2 - -2 AS four;
four
------
4
(1 row)
SELECT int2 '2' * int2 '2' = int2 '16' / int2 '4' AS true;
true
------
t
(1 row)
SELECT int4 '2' * int2 '2' = int2 '16' / int4 '4' AS true;
true
------
t
(1 row)
SELECT int2 '2' * int4 '2' = int4 '16' / int2 '4' AS true;
true
------
t
(1 row)
SELECT int4 '1000' < int4 '999' AS false;
false
-------
f
(1 row)
SELECT 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 AS ten;
ten
-----
10
(1 row)
SELECT 2 + 2 / 2 AS three;
three
-------
3
(1 row)
SELECT (2 + 2) / 2 AS two;
two
-----
2
(1 row)
-- corner case
SELECT (-1::int4<<31)::text;
text
-------------
-2147483648
(1 row)
SELECT ((-1::int4<<31)+1)::text;
text
-------------
-2147483647
(1 row)
-- check sane handling of INT_MIN overflow cases
SELECT (-2147483648)::int4 * (-1)::int4;
ERROR: integer out of range
SELECT (-2147483648)::int4 / (-1)::int4;
ERROR: integer out of range
SELECT (-2147483648)::int4 % (-1)::int4;
?column?
----------
0
(1 row)
SELECT (-2147483648)::int4 * (-1)::int2;
ERROR: integer out of range
SELECT (-2147483648)::int4 / (-1)::int2;
ERROR: integer out of range
SELECT (-2147483648)::int4 % (-1)::int2;
?column?
----------
0
(1 row)
-- check rounding when casting from float
SELECT x, x::int4 AS int4_value
FROM (VALUES (-2.5::float8),
(-1.5::float8),
(-0.5::float8),
(0.0::float8),
(0.5::float8),
(1.5::float8),
(2.5::float8)) t(x);
x | int4_value
------+------------
-2.5 | -2
-1.5 | -2
-0.5 | 0
0 | 0
0.5 | 0
1.5 | 2
2.5 | 2
(7 rows)
-- check rounding when casting from numeric
SELECT x, x::int4 AS int4_value
FROM (VALUES (-2.5::numeric),
(-1.5::numeric),
(-0.5::numeric),
(0.0::numeric),
(0.5::numeric),
(1.5::numeric),
(2.5::numeric)) t(x);
x | int4_value
------+------------
-2.5 | -3
-1.5 | -2
-0.5 | -1
0.0 | 0
0.5 | 1
1.5 | 2
2.5 | 3
(7 rows)
-- test gcd()
SELECT a, b, gcd(a, b), gcd(a, -b), gcd(b, a), gcd(-b, a)
FROM (VALUES (0::int4, 0::int4),
(0::int4, 6410818::int4),
(61866666::int4, 6410818::int4),
(-61866666::int4, 6410818::int4),
((-2147483648)::int4, 1::int4),
((-2147483648)::int4, 2147483647::int4),
((-2147483648)::int4, 1073741824::int4)) AS v(a, b);
a | b | gcd | gcd | gcd | gcd
-------------+------------+------------+------------+------------+------------
0 | 0 | 0 | 0 | 0 | 0
0 | 6410818 | 6410818 | 6410818 | 6410818 | 6410818
61866666 | 6410818 | 1466 | 1466 | 1466 | 1466
-61866666 | 6410818 | 1466 | 1466 | 1466 | 1466
-2147483648 | 1 | 1 | 1 | 1 | 1
-2147483648 | 2147483647 | 1 | 1 | 1 | 1
-2147483648 | 1073741824 | 1073741824 | 1073741824 | 1073741824 | 1073741824
(7 rows)
SELECT gcd((-2147483648)::int4, 0::int4); -- overflow
ERROR: integer out of range
SELECT gcd((-2147483648)::int4, (-2147483648)::int4); -- overflow
ERROR: integer out of range
-- test lcm()
SELECT a, b, lcm(a, b), lcm(a, -b), lcm(b, a), lcm(-b, a)
FROM (VALUES (0::int4, 0::int4),
(0::int4, 42::int4),
(42::int4, 42::int4),
(330::int4, 462::int4),
(-330::int4, 462::int4),
((-2147483648)::int4, 0::int4)) AS v(a, b);
a | b | lcm | lcm | lcm | lcm
-------------+-----+------+------+------+------
0 | 0 | 0 | 0 | 0 | 0
0 | 42 | 0 | 0 | 0 | 0
42 | 42 | 42 | 42 | 42 | 42
330 | 462 | 2310 | 2310 | 2310 | 2310
-330 | 462 | 2310 | 2310 | 2310 | 2310
-2147483648 | 0 | 0 | 0 | 0 | 0
(6 rows)
SELECT lcm((-2147483648)::int4, 1::int4); -- overflow
ERROR: integer out of range
SELECT lcm(2147483647::int4, 2147483646::int4); -- overflow
ERROR: integer out of range
|
