Commit 231f4964 authored by unknown's avatar unknown
Browse files

Added test case for Bug#18712: Truncation problem. The test 

is only to make sure that this will not be fixed, as it is
intended behaviour. Documentation will be improved accordingly.
parent 473ad8c9

mysql-test/r/select.result

+21 −0
Original line number Diff line number Diff line
@@ -3390,3 +3390,24 @@ id select_type table type possible_keys key key_len ref rows Extra 
1	SIMPLE	t2	const	PRIMARY	PRIMARY	4	const	1	

1	SIMPLE	t1	range	PRIMARY	PRIMARY	4	NULL	2	Using where

DROP TABLE t1,t2;

CREATE TABLE t1 (i TINYINT UNSIGNED NOT NULL);

INSERT t1 SET i = 0;

UPDATE t1 SET i = -1;

Warnings:

Warning	1264	Out of range value adjusted for column 'i' at row 1

SELECT * FROM t1;

i

0

UPDATE t1 SET i = CAST(i - 1 AS SIGNED);

Warnings:

Warning	1264	Out of range value adjusted for column 'i' at row 1

SELECT * FROM t1;

i

0

UPDATE t1 SET i = i - 1;

Warnings:

Warning	1264	Out of range value adjusted for column 'i' at row 1

SELECT * FROM t1;

i

255

DROP TABLE t1;

mysql-test/t/select.test

+15 −0
Original line number Diff line number Diff line
@@ -2871,3 +2871,18 @@ SELECT t2.sku, t2.sppr, t2.name, t1.sku, t1.pr 




DROP TABLE t1,t2;



#

# Bug#18712: Truncation problem (needs just documenting and test

# cases to prevent fixing this accidently. It is intended behaviour)

#



CREATE TABLE t1 (i TINYINT UNSIGNED NOT NULL);

INSERT t1 SET i = 0;

UPDATE t1 SET i = -1;

SELECT * FROM t1;

UPDATE t1 SET i = CAST(i - 1 AS SIGNED);

SELECT * FROM t1;

UPDATE t1 SET i = i - 1;

SELECT * FROM t1;

DROP TABLE t1;