@Cas Unfortunately I do not have any information on this. However, I have seen that DBR 14.3 and 15.0 introduced some changes to spark.sql(). I have not checked whether those changes resolve the issue outlined here. Your best bet is probably to go ahead and try with the DBR 15.1 (or 15.2 which is in Beta). Maybe @Retired_mod has more information on any future plans to support parameterized spark.sql for shared access mode Clusters with DBR > 13.3?