MariaDB starting with 10.3
--------------------------
DROP SEQUENCE was introduced in MariaDB 10.3.

Syntax
------

DROP [TEMPORARY] SEQUENCE [IF EXISTS] [/*COMMENT TO SAVE*/]
  sequence_name [, sequence_name] ...

Description
-----------

DROP SEQUENCE removes one or more sequences created with CREATE SEQUENCE. You
must have the DROP privilege for each sequence. MariaDB returns an error
indicating by name which non-existing tables it was unable to drop, but it
also drops all of the tables in the list that do exist.

Important: When a table is dropped, user privileges on the table are not
automatically dropped. See GRANT.

If another connection is using the sequence, a metadata lock is active, and
this statement will wait until the lock is released. This is also true for
non-transactional tables.

For each referenced sequence, DROP SEQUENCE drops a temporary sequence with
that name, if it exists. If it does not exist, and the TEMPORARY keyword is
not used, it drops a non-temporary sequence with the same name, if it exists.
The TEMPORARY keyword ensures that a non-temporary sequence will not
accidentally be dropped.

Use IF EXISTS to prevent an error from occurring for sequences that do not
exist. A NOTE is generated for each non-existent sequence when using IF
EXISTS. See SHOW WARNINGS.

DROP SEQUENCE requires the DROP privilege.

Notes
-----

DROP SEQUENCE only removes sequences, not tables. However, DROP TABLE can
remove both sequences and tables.

URL: https://mariadb.com/kb/en/drop-sequence/