[Coral-Trino] Modify transformation for CURRENT_TIMESTAMP #483
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Could you evaluate the Spark behavior in case Spark is used on the LHS? What triggered this issue? Is it still required? FYI @phd3. |
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What changes are proposed in this pull request, and why are they necessary?
In Hive,
CURRENT_TIMESTAMPreturns aUTCtimestamp, whereas in Trino, it returns a timestamp based on the session's timezone. Therefore, to be compatible with Hive query result,AT TIME ZONE 'UTC'should be added to the translated Trino SQL. For example,SELECT CURRENT_TIMESTAMPis transformed intoSELECT CAST(CURRENT_TIMESTAMP AT TIME ZONE 'UTC' AS TIMESTAMP(3)).How was this patch tested?
Modified unit tests.