MySQL/MariaDB drop user with long user name fails - mysql

Question

I'm running MySQL Ver 15.1 Distrib 10.3.9-MariaDB for OSX10.13 and have a bunch of users (around 14) where the username is apparently too long, see below.
MariaDB [(none)]> SELECT Host, User FROM mysql.user;
+-----------+-------------------------+
| Host | User |
+-----------+-------------------------+
| 127.0.0.1 | tenant_2SxSBywyXh3QW5L4 |
| 127.0.0.1 | tenant_4j3CWVXjgtDD2OrI |
| 127.0.0.1 | tenant_5OOBxRgjSvFehwI2 |
| 127.0.0.1 | tenant_6C3vAqBTVns8rMTT |
| 127.0.0.1 | tenant_9PVCY1Msa61u43Oh |
| 127.0.0.1 | tenant_RyFspluIGEi3Fkby |
| 127.0.0.1 | tenant_SQtfEQZmWRFfKmHy |
| 127.0.0.1 | tenant_VC8pYaJ3it1LdYK3 |
| 127.0.0.1 | tenant_Zr84h3vkLdwkqR33 |
| 127.0.0.1 | tenant_cvifD1I2Rjghjnpu |
| 127.0.0.1 | tenant_jO1tUJJokremTW5P |
| 127.0.0.1 | tenant_p6Bhzhi0OqMH4gc9 |
| 127.0.0.1 | tenant_rjyOX1NqEN6k6mk4 |
| 127.0.0.1 | tenant_xfcHjsn0mHBfURAw |
| 127.0.0.1 | test_testing_local |
| localhost | mysql.session |
| localhost | mysql.sys |
| localhost | root |
+-----------+-------------------------+
18 rows in set (0.000 sec)
When I try to drop these users using the following command I'm in encountering this error:
MariaDB [(none)]> DROP USER 'tenant_5OOBxRgjSvFehwI2#127.0.0.1';
ERROR 1470 (HY000): String 'tenant_5OOBxRgjSvFehwI2#127.0.0.1' is too long for user name (should be no longer than 32)
MariaDB [(none)]> DROP USER 'tenant_5OOBxRgjSvFehwI2#localhost';
ERROR 1470 (HY000): String 'tenant_5OOBxRgjSvFehwI2#localhost' is too long for user name (should be no longer than 32)
Any idea's on how I can drop these users?
Most annoying side effect of this is when opening up SequalPro, and I get 14 errors (one after the other) notifying me of this user name being too long issue.
Also, another odd question that I'd be interested to hear about is why when these user name are only 22-24 characters long are they causing a ... too long for user name (should be no longer than 32) error, as they don't breach the 32 character limit?
Appreciate any help :)

Answer 1

You can try several options. Can try the latest test build of SequelPro. The test build (3477d22) seems to solve the long names issue for me.
Test Builds are here: https://sequelpro.com/test-builds
Or one of the latest development builds. http://nightly.sequelpro.com/
For me, with Mariadb 10.x server and nightly build, it also worked for me.

Answer 2

You have to comment the 'username' # 'host' ...
Use:
DROP USER 'tenant_5OOBxRgjSvFehwI2'#'127.0.0.1';

Answer 3

I can't reproduce the problem:
MariaDB [(none)]> SELECT VERSION();
+-----------------+
| VERSION() |
+-----------------+
| 10.3.11-MariaDB |
+-----------------+
1 row in set (0.000 sec)
MariaDB [(none)]> DESC mysql.user; -- User char(80)
+------------------------+-----------------------------------+------+-----+----------+-------+
| Field | Type | Null | Key | Default | Extra |
+------------------------+-----------------------------------+------+-----+----------+-------+
| Host | char(60) | NO | PRI | | |
| User | char(80) | NO | PRI | | |
.
.
.
+------------------------+-----------------------------------+------+-----+----------+-------+
47 rows in set (0.001 sec)
MariaDB [(none)]> CREATE USER 'tenant_5OOBxRgjSvFehwI2'#'127.0.0.1';
Query OK, 0 rows affected (0.001 sec)
MariaDB [(none)]> DROP USER 'tenant_5OOBxRgjSvFehwI2#127.0.0.1';
ERROR 1396 (HY000): Operation DROP USER failed for 'tenant_5OOBxRgjSvFehwI2#127.0.0.1'#'%'
MariaDB [(none)]> DROP USER 'tenant_5OOBxRgjSvFehwI2I'#'127.0.0.1'; -- Wrong user
ERROR 1396 (HY000): Operation DROP USER failed for 'tenant_5OOBxRgjSvFehwI2I'#'127.0.0.1'
MariaDB [(none)]> DROP USER 'tenant_5OOBxRgjSvFehwI2'#'127.0.0.1';
Query OK, 0 rows affected (0.001 sec)