Bug Report: UUID() function is not correctly marked as non-constant

[dbussink]

Overview of the Issue

The evalengine UUID() function is not marked properly as non-constant, resulting in the value being cached / the invocation being optimized away so it doesn't return a new value on each invocation:

Reproduction Steps

mysql> select uuid();
+--------------------------------------+
| uuid()                               |
+--------------------------------------+
| 7881fcfa-57b2-11ee-b78d-acde48001122 |
+--------------------------------------+
1 row in set (0.00 sec)

mysql> select uuid();
+--------------------------------------+
| uuid()                               |
+--------------------------------------+
| 793595b2-57b2-11ee-b78d-acde48001122 |
+--------------------------------------+
1 row in set (0.00 sec)

mysql> select uuid();
+--------------------------------------+
| uuid()                               |
+--------------------------------------+
| 793595b2-57b2-11ee-b78d-acde48001122 |
+--------------------------------------+
1 row in set (0.00 sec)

Binary Version

Broken since https://github.com/vitessio/vitess/pull/13097

Operating System and Environment details

-

Log Fragments

No response