This is easy to confirm:
mysql> select version(); +-------------+ | version() | +-------------+ | 5.6.21-69.0 | +-------------+ 1 row in set (0.03 sec)
mysql> set statement non_existing=1 for select 1; ERROR 1193 (HY000): Unknown system variable 'non_existing' mysql> show errors; +-------+------+----------------------------------------+ | Level | Code | Message | +-------+------+----------------------------------------+ | Error | 1193 | Unknown system variable 'non_existing' | | Error | 1193 | Unknown system variable 'non_existing' | +-------+------+----------------------------------------+ 2 rows in set (0.00 sec)
mysql> select @@error_count; +---------------+ | @@error_count | +---------------+ | 2 | +---------------+ 1 row in set (0.00 sec)
This is easy to confirm:
mysql> select version();
+-------------+
| version() |
+-------------+
| 5.6.21-69.0 |
+-------------+
1 row in set (0.03 sec)
mysql> set statement non_existing=1 for select 1; -+----- -+----- ------- ------- ------- ------- ------- + -+----- -+----- ------- ------- ------- ------- ------- + -+----- -+----- ------- ------- ------- ------- ------- +
ERROR 1193 (HY000): Unknown system variable 'non_existing'
mysql> show errors;
+------
| Level | Code | Message |
+------
| Error | 1193 | Unknown system variable 'non_existing' |
| Error | 1193 | Unknown system variable 'non_existing' |
+------
2 rows in set (0.00 sec)
mysql> select @@error_count;
+---------------+
| @@error_count |
+---------------+
| 2 |
+---------------+
1 row in set (0.00 sec)