drexler-sky commented on PR #1923:
URL:
https://github.com/apache/datafusion-comet/pull/1923#issuecomment-3006298989
@andygrove Thanks for the suggestion! I have tried
```
checkSparkAnswerAndOperator(spark.sql("""
SELECT array_distinct(
CASE WHEN _2 = _3
THEN array(_4)
ELSE array()
END
)
FROM t1
"""))
```
However, Spark still appears to replace the second array_distinct with `[]`.
```
== Physical Plan ==
*(1) Project [CASE WHEN (cast(_2#1 as smallint) = _3#2) THEN
array_distinct(array(_4#3)) ELSE [] END AS array_distinct(CASE WHEN (_2 = _3)
THEN array(_4) ELSE array() END)#44]
+- *(1) CometColumnarToRow
+- CometScan parquet [_2#1,_3#2,_4#3] Batched: true, DataFilters: [],
Format: CometParquet, Location: InMemoryFileIndex(1
paths)[file:/private/var/folders/2r/znvj4hhd3t1cp22pmw4m3h_40000gn/T/spark-39...,
PartitionFilters: [], PushedFilters: [], ReadSchema:
struct<_2:tinyint,_3:smallint,_4:int>
```
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