comphead commented on code in PR #2600:
URL: https://github.com/apache/datafusion-comet/pull/2600#discussion_r2640518075
##########
spark/src/test/scala/org/apache/comet/exec/CometAggregateSuite.scala:
##########
@@ -1602,35 +1768,68 @@ class CometAggregateSuite extends CometTestBase with
AdaptiveSparkPlanHelper {
}
}
+ test("try_sum overflow - with GROUP BY") {
+ // Test Long overflow with GROUP BY - some groups overflow while some don't
+ withParquetTable(Seq((Long.MaxValue, 1), (100L, 1), (200L, 2), (300L, 2)),
"tbl") {
+ val res = sql("SELECT _2, try_sum(_1) FROM tbl GROUP BY
_2").repartition(2, col("_2"))
Review Comment:
why repartition needed here? if its important for the test case it would be
good to comment the reason
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