andygrove commented on code in PR #1072:
URL: https://github.com/apache/datafusion-comet/pull/1072#discussion_r1835886113
##########
spark/src/test/scala/org/apache/comet/CometExpressionSuite.scala:
##########
@@ -2313,4 +2313,22 @@ class CometExpressionSuite extends CometTestBase with
AdaptiveSparkPlanHelper {
}
}
}
+
+ test("array_append") {
Review Comment:
Interesting. Let's handle this in Comet rather than modify DataFusion. One
option is to fork the `array_append` code and modify it. Another option would
be to translate `array_append(a, b)` into something like `CASE WHEN a IS NULL
THEN null ELSE array_append(a, b) END`.
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