andygrove commented on code in PR #2604:
URL: https://github.com/apache/datafusion-comet/pull/2604#discussion_r2449534383
##########
spark/src/test/scala/org/apache/comet/CometExpressionSuite.scala:
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@@ -3204,4 +3204,15 @@ class CometExpressionSuite extends CometTestBase with
AdaptiveSparkPlanHelper {
}
}
+ test("test concat function - strings") {
Review Comment:
Concat supports other types as well:
```scala
private def allowedTypes: Seq[AbstractDataType] = Seq(StringType,
BinaryType, ArrayType)
```
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