Foreign Key Support?

Hi! Are foreign key constraints on custom tables supported by Duplicator?

For example, the following SQL is used to create a foreign key constraint upon activation of the plugin in question:

    "ALTER TABLE wp_custom_table_visits
      ADD CONSTRAINT FK_visits_user_id FOREIGN KEY IF NOT EXISTS (user_id) 
      REFERENCES wp_custom_table_users(id);"

Could you please point us in the right direction? Thank you so much!