[GitHub] [spark] HyukjinKwon commented on a change in pull request #26114: [SPARK-29468][SQL] Change Literal.sql to be correct for floats.

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HyukjinKwon commented on a change in pull request #26114: [SPARK-29468][SQL] Change Literal.sql to be correct for floats.
URL: https://github.com/apache/spark/pull/26114#discussion_r337985181
 
 

 ##########
 File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
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 @@ -370,7 +390,7 @@ case class Literal (value: Any, dataType: DataType) extends LeafExpression {
         case _ if v.isNaN => "'NaN'"
         case Float.PositiveInfinity => "'Infinity'"
         case Float.NegativeInfinity => "'-Infinity'"
-        case _ => v
+        case _ => s"'$v'"
 
 Review comment:
   No big deal but it would be just `val castedValue = s"'$v'"`
   
   ```
   scala> s"'${Double.NaN}'"
   res0: String = 'NaN'
   
   scala> s"'${Float.NegativeInfinity}'"
   res1: String = '-Infinity'
   
   scala> s"'${Float.PositiveInfinity}'"
   res2: String = 'Infinity'
   ```

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