NVL2
MariaDB starting with 10.3
The NLV2 function was introduced in MariaDB 10.3.0.
Syntax
NVL2(expr1,expr2,expr3)
Description
The NVL2 function returns a value based on whether a specified expression is NULL or not. If expr1 is not NULL, then NVL2 returns expr2. If expr1 is NULL, then NVL2 returns expr3.
Examples
SELECT NVL2(NULL,1,2);
+----------------+
| NVL2(NULL,1,2) |
+----------------+
| 2 |
+----------------+
SELECT NVL2('x',1,2);
+---------------+
| NVL2('x',1,2) |
+---------------+
| 1 |
+---------------+
See Also
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https://mariadb.com/kb/en/nvl2/