Hi
It won’t work with Spring Boot. flowable.cfg.xml is not applicable if you’re building process engine with Spring style.
It’ll work if you use Standalone configuration ( check StandaloneProcessEngineConfiguration class - there is databaseSchemaUpdate property).
If you’re using Spring Boot you should pass flowable.databaseSchemaUpdate (same as in point 2).
BTW. there is a similar topic here - Disable Auto creation of DB Tables - #6 by swapnilbarwat