Wierd tables in mysql system database

Hi,

I can see additional tables in the mysql system database in mariadbin our environment:

below is the output of show tables: MariaDB [mysql]> show full tables; +---------------------------+------------+ | Tables_in_mysql | Table_type | +---------------------------+------------+ | ahelkk | BASE TABLE | | ahxgcg | BASE TABLE | | akysit32 | BASE TABLE | | amtyyy | BASE TABLE | | aucykv32 | BASE TABLE | | avjyfr | BASE TABLE | | azimlo32 | BASE TABLE | | bdbtrg32 | BASE TABLE | | bguwtk32 | BASE TABLE | | blpqss | BASE TABLE | | brafih | BASE TABLE | | bsbwxu | BASE TABLE | | ccadhg32 | BASE TABLE | | cmdtsw32 | BASE TABLE | | column_stats | BASE TABLE | | columns_priv | BASE TABLE | | ctpsqi | BASE TABLE | | ctrkwg | BASE TABLE | | cyubjk | BASE TABLE | | db | BASE TABLE | | event | BASE TABLE | | fbuiud | BASE TABLE | | fjzzfq32 | BASE TABLE | | flrqbb32 | BASE TABLE | | fqewut32 | BASE TABLE | | fryhrd | BASE TABLE | | func | BASE TABLE | | gbsutw | BASE TABLE | | general_log | BASE TABLE | | gmidqb | BASE TABLE | | gothrx | BASE TABLE | | gtid_slave_pos | BASE TABLE | | gzsvhs32 | BASE TABLE | | hdeavq32 | BASE TABLE | | help_category | BASE TABLE | | help_keyword | BASE TABLE | | help_relation | BASE TABLE | | help_topic | BASE TABLE | | host | BASE TABLE | | hrkyld32 | BASE TABLE | | hygrpv32 | BASE TABLE | | ibugsz | BASE TABLE | | ihpyuc | BASE TABLE | | index_stats | BASE TABLE | | innodb_index_stats | BASE TABLE | | innodb_table_stats | BASE TABLE | | iozatq32 | BASE TABLE | | jnuujq | BASE TABLE | | jqugjw | BASE TABLE | | kbnvvb | BASE TABLE | | kekqtj | BASE TABLE | | kftigg32 | BASE TABLE | | laohij | BASE TABLE | | mkgqnj32 | BASE TABLE | | mljiue32 | BASE TABLE | | molina | BASE TABLE | | mwpefl32 | BASE TABLE | | nbbphu | BASE TABLE | | ngyful | BASE TABLE | | niggpy32 | BASE TABLE | | nljabx32 | BASE TABLE | | noncef32 | BASE TABLE | | nqndzp32 | BASE TABLE | | ochwks32 | BASE TABLE | | oifzmo | BASE TABLE | | otrjmp32 | BASE TABLE | | ovpjpb | BASE TABLE | | ozecir32 | BASE TABLE | | pgyniw32 | BASE TABLE | | plugin | BASE TABLE | | proc | BASE TABLE | | procs_priv | BASE TABLE | | proxies_priv | BASE TABLE | | ptetpt | BASE TABLE | | pxpdnv | BASE TABLE | | pywfzl | BASE TABLE | | qdfngi32 | BASE TABLE | | qfbsjj | BASE TABLE | | qjrzhs32 | BASE TABLE | | qxxtry | BASE TABLE | | rmiuit | BASE TABLE | | roles_mapping | BASE TABLE | | rpppwd32 | BASE TABLE | | rrmxoy32 | BASE TABLE | | servers | BASE TABLE | | sgjqvv | BASE TABLE | | slow_log | BASE TABLE | | svmelw32 | BASE TABLE | | table_stats | BASE TABLE | | tables_priv | BASE TABLE | | tebato | BASE TABLE | | tempMix | BASE TABLE | | tempMix1 | BASE TABLE | | tempMix4 | BASE TABLE | | time_zone | BASE TABLE | | time_zone_leap_second | BASE TABLE | | time_zone_name | BASE TABLE | | time_zone_transition | BASE TABLE | | time_zone_transition_type | BASE TABLE | | ugtpei32 | BASE TABLE | | uktxny | BASE TABLE | | user | BASE TABLE | | utimtd | BASE TABLE | | vshiuk32 | BASE TABLE | | wtuhjh | BASE TABLE | | xgdwfu32 | BASE TABLE | | xgxdti32 | BASE TABLE | | xzsihp32 | BASE TABLE | | yopjcy32 | BASE TABLE | | zchwft | BASE TABLE | | zefdjd | BASE TABLE | | zmbics32 | BASE TABLE | +---------------------------+------------+ 112 rows in set (0.00 sec)

Please can anyone help me understand the wierd tables in the mysql system database other than the usual ones which are present.

Also these tables have columns of type longblob for example:

MariaDB [mysql]> describe zmbics32; +-------+----------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+----------+------+-----+---------+-------+ | data | longblob | YES | | NULL | | +-------+----------+------+-----+---------+-------+ 1 row in set (0.00 sec)

My question is this something a mariadb behaviour or an application behavious.

I have checked with the application team and they are convinced that it is not the application creating these tables.

Please shed some light.

Thanks in advance