On 09/01/2018 01:14, Mats Eklund wrote:

Need some help here. I have the following expression:

SELECT IF(1=1, 0x2, 0x4) | 0x1

which in MySQL evaluates to: 3

but in MariaDB it evaluates to: 1

MySQL's result seems correct to me. Would appreciate any advice on this.

This is related to the change made in 10.0.3. See:
https://mariadb.com/kb/en/library/hexadecimal-literals/

Also see the explanation in:
https://jira.mariadb.org/browse/MDEV-6092

If you specifically CAST it as a number it will work as you expect, for example

SELECT IF(1=1, CAST(0x2 AS UNSIGNED), CAST(0x4 AS UNSIGNED)) | 0x1;
+-------------------------------------------------------------+
| IF(1=1, CAST(0x2 AS UNSIGNED), CAST(0x4 AS UNSIGNED)) | 0x1 |
+-------------------------------------------------------------+
| 3 |
+-------------------------------------------------------------+