Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/18532#discussion_r125536928
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/UnivocityParser.scala
---
@@ -111,19 +111,15 @@ class UnivocityParser(
case options.nanValue => Float.NaN
case options.negativeInf => Float.NegativeInfinity
case options.positiveInf => Float.PositiveInfinity
- case datum =>
--- End diff --
BTW, it looks we are not using `NumberFormat.parse` in schema inference -
https://github.com/apache/spark/blob/7e5359be5ca038fdb579712b18e7f226d705c276/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/CSVInferSchema.scala#L141
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