I am using SPIDER engine to access a remote table from within my MariaDB database, which requires a server definition in mysql.servers table created via CREATE SERVER statement.
I noticed that this table has a column named Db of type char(64) with a constraint hitting information_schema.SCHEMATA.SCHEMA_NAME field.
I was wondering what is the meaning of this, since the database referred by this field might be on a different server? I feel I am missing something but I can't guess what.
