[MDEV-7146] NULLIF returns unexpected result with a YEAR field Created: 2014-11-20  Updated: 2014-12-01  Resolved: 2014-11-20

Status: Closed
Project: MariaDB Server
Component/s: Temporal Types
Affects Version/s: None
Fix Version/s: 10.1.2

Type: Bug Priority: Major
Reporter: Alexander Barkov Assignee: Alexander Barkov
Resolution: Fixed Votes: 0
Labels: None


 Description    

DROP TABLE IF EXISTS t1;
 
CREATE TABLE t1 (a YEAR(2));
 
INSERT INTO t1 VALUES (0);
 
SELECT a,NULLIF(a,2000),NULLIF(2001,a) FROM t1;

returns

+------+----------------+----------------+
 
| a    | NULLIF(a,2000) | NULLIF(2001,a) |
 
+------+----------------+----------------+
 
|   00 |           NULL |              1 |
 
+------+----------------+----------------+

This is Ok that YEAR=00 is compared as equal to 2000, but the return value for NULLIF(2001,a) does not look Ok. The expected values is 2001, not 1.
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