Custom Database Queries is a new extension "to bring in business data, job processing metrics, database and table statistics, anything that is stored in your Databases" into Dynatrace!
It doesn't seem to be an Extension 2.0 yet, but the corresponding documentation pages about the SQL Data sources are already out there:
https://www.dynatrace.com/support/help/extend-dynatrace/extensions20/data-sources/sql
Although I have not yet tried it out, it looks very promising!
Antonio Sousa
