247 lines
6.1 KiB
Plaintext
247 lines
6.1 KiB
Plaintext
--
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-- INT2
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-- NOTE: int2 operators never check for over/underflow!
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-- Some of these answers are consequently numerically incorrect.
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--
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CREATE TABLE INT2_TBL(f1 int2);
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INSERT INTO INT2_TBL(f1) VALUES ('0 ');
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INSERT INTO INT2_TBL(f1) VALUES (' 1234 ');
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INSERT INTO INT2_TBL(f1) VALUES (' -1234');
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INSERT INTO INT2_TBL(f1) VALUES ('34.5');
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ERROR: invalid input syntax for integer: "34.5"
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LINE 1: INSERT INTO INT2_TBL(f1) VALUES ('34.5');
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^
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-- largest and smallest values
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INSERT INTO INT2_TBL(f1) VALUES ('32767');
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INSERT INTO INT2_TBL(f1) VALUES ('-32767');
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-- bad input values -- should give errors
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INSERT INTO INT2_TBL(f1) VALUES ('100000');
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ERROR: value "100000" is out of range for type smallint
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LINE 1: INSERT INTO INT2_TBL(f1) VALUES ('100000');
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^
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INSERT INTO INT2_TBL(f1) VALUES ('asdf');
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ERROR: invalid input syntax for integer: "asdf"
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LINE 1: INSERT INTO INT2_TBL(f1) VALUES ('asdf');
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^
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INSERT INTO INT2_TBL(f1) VALUES (' ');
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ERROR: invalid input syntax for integer: " "
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LINE 1: INSERT INTO INT2_TBL(f1) VALUES (' ');
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^
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INSERT INTO INT2_TBL(f1) VALUES ('- 1234');
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ERROR: invalid input syntax for integer: "- 1234"
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LINE 1: INSERT INTO INT2_TBL(f1) VALUES ('- 1234');
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^
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INSERT INTO INT2_TBL(f1) VALUES ('4 444');
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ERROR: invalid input syntax for integer: "4 444"
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LINE 1: INSERT INTO INT2_TBL(f1) VALUES ('4 444');
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^
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INSERT INTO INT2_TBL(f1) VALUES ('123 dt');
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ERROR: invalid input syntax for integer: "123 dt"
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LINE 1: INSERT INTO INT2_TBL(f1) VALUES ('123 dt');
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^
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INSERT INTO INT2_TBL(f1) VALUES ('');
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ERROR: invalid input syntax for integer: ""
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LINE 1: INSERT INTO INT2_TBL(f1) VALUES ('');
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^
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SELECT '' AS five, * FROM INT2_TBL;
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five | f1
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------+--------
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| 0
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| 1234
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| -1234
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| 32767
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| -32767
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(5 rows)
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SELECT '' AS four, i.* FROM INT2_TBL i WHERE i.f1 <> int2 '0';
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four | f1
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------+--------
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| 1234
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| -1234
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| 32767
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| -32767
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(4 rows)
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SELECT '' AS four, i.* FROM INT2_TBL i WHERE i.f1 <> int4 '0';
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four | f1
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------+--------
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| 1234
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| -1234
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| 32767
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| -32767
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(4 rows)
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SELECT '' AS one, i.* FROM INT2_TBL i WHERE i.f1 = int2 '0';
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one | f1
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-----+----
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| 0
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(1 row)
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SELECT '' AS one, i.* FROM INT2_TBL i WHERE i.f1 = int4 '0';
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one | f1
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-----+----
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| 0
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(1 row)
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SELECT '' AS two, i.* FROM INT2_TBL i WHERE i.f1 < int2 '0';
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two | f1
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-----+--------
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| -1234
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| -32767
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(2 rows)
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SELECT '' AS two, i.* FROM INT2_TBL i WHERE i.f1 < int4 '0';
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two | f1
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-----+--------
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| -1234
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| -32767
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(2 rows)
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SELECT '' AS three, i.* FROM INT2_TBL i WHERE i.f1 <= int2 '0';
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three | f1
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-------+--------
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| 0
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| -1234
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| -32767
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(3 rows)
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SELECT '' AS three, i.* FROM INT2_TBL i WHERE i.f1 <= int4 '0';
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three | f1
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-------+--------
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| 0
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| -1234
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| -32767
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(3 rows)
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SELECT '' AS two, i.* FROM INT2_TBL i WHERE i.f1 > int2 '0';
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two | f1
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-----+-------
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| 1234
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| 32767
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(2 rows)
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SELECT '' AS two, i.* FROM INT2_TBL i WHERE i.f1 > int4 '0';
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two | f1
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-----+-------
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| 1234
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| 32767
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(2 rows)
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SELECT '' AS three, i.* FROM INT2_TBL i WHERE i.f1 >= int2 '0';
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three | f1
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-------+-------
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| 0
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| 1234
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| 32767
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(3 rows)
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SELECT '' AS three, i.* FROM INT2_TBL i WHERE i.f1 >= int4 '0';
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three | f1
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-------+-------
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| 0
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| 1234
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| 32767
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(3 rows)
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-- positive odds
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SELECT '' AS one, i.* FROM INT2_TBL i WHERE (i.f1 % int2 '2') = int2 '1';
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one | f1
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-----+-------
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| 32767
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(1 row)
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-- any evens
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SELECT '' AS three, i.* FROM INT2_TBL i WHERE (i.f1 % int4 '2') = int2 '0';
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three | f1
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-------+-------
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| 0
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| 1234
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| -1234
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(3 rows)
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SELECT '' AS five, i.f1, i.f1 * int2 '2' AS x FROM INT2_TBL i;
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ERROR: smallint out of range
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SELECT '' AS five, i.f1, i.f1 * int2 '2' AS x FROM INT2_TBL i
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WHERE abs(f1) < 16384;
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five | f1 | x
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------+-------+-------
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| 0 | 0
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| 1234 | 2468
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| -1234 | -2468
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(3 rows)
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SELECT '' AS five, i.f1, i.f1 * int4 '2' AS x FROM INT2_TBL i;
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five | f1 | x
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------+--------+--------
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| 0 | 0
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| 1234 | 2468
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| -1234 | -2468
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| 32767 | 65534
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| -32767 | -65534
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(5 rows)
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SELECT '' AS five, i.f1, i.f1 + int2 '2' AS x FROM INT2_TBL i;
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ERROR: smallint out of range
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SELECT '' AS five, i.f1, i.f1 + int2 '2' AS x FROM INT2_TBL i
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WHERE f1 < 32766;
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five | f1 | x
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------+--------+--------
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| 0 | 2
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| 1234 | 1236
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| -1234 | -1232
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| -32767 | -32765
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(4 rows)
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SELECT '' AS five, i.f1, i.f1 + int4 '2' AS x FROM INT2_TBL i;
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five | f1 | x
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------+--------+--------
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| 0 | 2
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| 1234 | 1236
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| -1234 | -1232
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| 32767 | 32769
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| -32767 | -32765
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(5 rows)
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SELECT '' AS five, i.f1, i.f1 - int2 '2' AS x FROM INT2_TBL i;
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ERROR: smallint out of range
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SELECT '' AS five, i.f1, i.f1 - int2 '2' AS x FROM INT2_TBL i
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WHERE f1 > -32767;
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five | f1 | x
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------+-------+-------
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| 0 | -2
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| 1234 | 1232
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| -1234 | -1236
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| 32767 | 32765
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(4 rows)
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SELECT '' AS five, i.f1, i.f1 - int4 '2' AS x FROM INT2_TBL i;
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five | f1 | x
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------+--------+--------
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| 0 | -2
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| 1234 | 1232
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| -1234 | -1236
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| 32767 | 32765
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| -32767 | -32769
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(5 rows)
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SELECT '' AS five, i.f1, i.f1 / int2 '2' AS x FROM INT2_TBL i;
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five | f1 | x
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------+--------+--------
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| 0 | 0
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| 1234 | 617
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| -1234 | -617
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| 32767 | 16383
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| -32767 | -16383
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(5 rows)
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SELECT '' AS five, i.f1, i.f1 / int4 '2' AS x FROM INT2_TBL i;
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five | f1 | x
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------+--------+--------
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| 0 | 0
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| 1234 | 617
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| -1234 | -617
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| 32767 | 16383
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| -32767 | -16383
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(5 rows)
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