dosubot[bot] commented on issue #35910:
URL: https://github.com/apache/superset/issues/35910#issuecomment-3468497210

   <!-- Answer -->
   This is a known regression in Superset 6.0.0rc1/rc2 affecting physical 
datasets for engines with supports_cross_catalog_queries=True (like Trino). The 
bug causes the full table identifier to be constructed and quoted as a single 
string, leading to errors where the schema/catalog is duplicated in the 
generated SQL, which matches what you're seeing. Virtual datasets work because 
they bypass this identifier quoting logic and use direct SQL instead.
   
   A temporary workaround that has worked for other engines (such as Snowflake) 
is to disable supports_cross_catalog_queries in the engine spec. This restores 
the correct behavior for physical datasets and avoids the double 
prefixing/quoting issue. Superset maintainers have acknowledged this as a 
regression and are working on a fix. You can track similar discussions and see 
a workaround example in [this 
issue](https://github.com/apache/superset/issues/35116).
   
   If you need to keep using physical datasets with Trino, you can try patching 
the engine spec to set supports_cross_catalog_queries = False for Trino as a 
stopgap until an official fix lands.
   
   
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