Question

In a MySQL script I would like to do something like this:

SET @username = CONCAT(DATABASE(), "-1@`%`");
CREATE USER @username;

but I can’t resolve the syntax error in the CREATE USER line.

Is there a way to escape the inline variable so that CREATE USER can have a dynamically created user?

Answer 1

You can do it with prepared statements:

set @sql=concat("create user '", database(), "-haha", "'@'%' identified by 'whatever';");
prepare stmt from @sql;
execute stmt;
deallocate prepare stmt;

select @sql;

select * from mysql.user where user = 'playground-haha';