[GitHub] [spark] wangyum commented on pull request #30222: [SPARK-33315][SQL] Simplify CaseWhen with EqualTo

[GitBox <gi...@apache.org>]

wangyum commented on pull request #30222:
URL: https://github.com/apache/spark/pull/30222#issuecomment-722751973


   It seems it is caused by **deterministic**. cc @viirya
   ```
   == Analyzed Logical Plan ==
   label: double, features: vector, fold: int
   Filter (UDF(fold#14) AND NOT (fold#14 = 2))
   +- Repartition 2, true
      +- Project [label#3, features#4, fold#14]
         +- Project [label#3, features#4, random#10, CASE WHEN (random#10 < 0.33) THEN 0 WHEN (random#10 < 0.66) THEN 1 ELSE 2 END AS fold#14]
            +- Project [label#3, features#4, rand(100) AS random#10]
               +- Repartition 1, true
                  +- SerializeFromObject [knownnotnull(assertnotnull(input[0, org.apache.spark.ml.feature.LabeledPoint, true])).label AS label#3, newInstance(class org.apache.spark.ml.linalg.VectorUDT).serialize AS features#4]
                     +- ExternalRDD [obj#2]
   
   == Optimized Logical Plan ==
   LocalRelation <empty>, [label#3, features#4, fold#14]
   ```


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