[GitHub] [spark] mccheah commented on a change in pull request #26738: [SPARK-30082] Do not replace Zeros when replacing NaNs

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mccheah commented on a change in pull request #26738: [SPARK-30082] Do not replace Zeros when replacing NaNs
URL: https://github.com/apache/spark/pull/26738#discussion_r352867265
 
 

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 File path: sql/core/src/main/scala/org/apache/spark/sql/DataFrameNaFunctions.scala
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 @@ -456,11 +456,25 @@ final class DataFrameNaFunctions private[sql](df: DataFrame) {
     val keyExpr = df.col(col.name).expr
     def buildExpr(v: Any) = Cast(Literal(v), keyExpr.dataType)
     val branches = replacementMap.flatMap { case (source, target) =>
-      Seq(buildExpr(source), buildExpr(target))
+        if (!(checkIfNonFractionalNumeric(col.dataType) &&
 
 Review comment:
   You could do `col.dataType match` instead of the separate function with the long boolean expression there. I think that's more idiomatic to Scala and in the context of this part of the code.

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