I don't know if this is feasible, however I was thinking that it would be nice to be able to define the DDL for custom tables and other SQL resources within Ignition, which Ignition would then use to create those objects if they don't already exist.

This would save having to write this into your script libraries for your custom table definitions and would provide a central location to house them. This would make it far simpler to also restore objects within a database, with the definitions all stored within the gateway backup to better support a single source of configuration.