GCS documentation states time_zone can be used as JDBC connection string parameter.
Testing Bigquery connection confirms:
JDBC string: jdbc:BQDriver::xxxxxxx/looker_scratch?withServiceAccount=true&...&time_zone=Asia/Kolkata&readTimeout=240000&connectTimeout=240000&useLegacySql=false
Then running in SQL Runner
select cast(current_timestamp as datetime)
produces different results with and without the first line (correct is SET is present).
Any thoughts why the JDBC param is ignored?