gartens

Results 3 issues of gartens

## Summary This is a prototype on how users can influence the data store chosen by Polypheny. At the moment it is only implemented for SQL queries and it operates...

- Replace `Catalog.getInstance().getSnapshot()` with `Catalog.snapshot` - Remove one unused method from the catalog - Remove an unecessary `map` call - When the class has a catalog field, use that instead...

The main contribution of this PR are improvements to transaction handling in the Prism driver and decimal validation: - Ensure that statements objects used in the Prism driver belong to...