DBR 17.1 Spatial SQL Functions and Apache Sedona

[der]

I noticed in the DBR 17.1 release notes that ST geospatial functions are now in public preview - great news for us since this means native support in Databricks.

https://docs.databricks.com/aws/en/release-notes/runtime/17.1#expanded-spatial-sql-expressions-and-g...

We're currently using Apache Sedona 1.7.2 with DBR 16.4, and I have a few questions:

1. Can Apache Sedona (already Spark 4.0-ready: https://github.com/apache/sedona/tree/master/spark/spark-4.0 ) be used alongside DBR 17.1?
2. When both Sedona and DBR 17.1+ are active, which SQL functions are executed?
3. Will additional ST functions be introduced, and is there a plan for raster functions?
   https://docs.databricks.com/aws/en/sql/language-manual/sql-ref-st-geospatial-functions-alpha