MariaDB 10.3

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create table `table` (id int);

create sequence mysequence
insert into t values(3)

Table 'fiddle.t' doesn't exist

SELECT @max_value := MAX(`Id`) FROM `table`;
SELECT setval('MySequence', @max_value);

@max_value := MAX(`Id`)

null

You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ''MySequence', @max_value)' at line 1