dongjoon-hyun commented on issue #26401: [SPARK-29761][SQL] do not output leading 'interval' in CalendarInterval.toString URL: https://github.com/apache/spark/pull/26401#issuecomment-550093309 Thank you for pinging me, @cloud-fan . I'm +1 for this, but it seems that we need a migration guide in order to avoid surprises because the output change might affect the old Spark application which expects that prefix. (cc @gatorsmile ) This PR already shows that kind of side effects. ```scala - df.selectExpr(s"d - $i"), + df.selectExpr(s"d - INTERVAL'$i'"), ```
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