Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/17956#discussion_r116144531 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/json/JacksonParser.scala --- @@ -127,13 +126,15 @@ class JacksonParser( case VALUE_STRING => // Special case handling for NaN and Infinity. val value = parser.getText - val lowerCaseValue = value.toLowerCase(Locale.ROOT) - if (lowerCaseValue.equals("nan") || - lowerCaseValue.equals("infinity") || - lowerCaseValue.equals("-infinity") || - lowerCaseValue.equals("inf") || - lowerCaseValue.equals("-inf")) { + if (value.equals("NaN") || --- End diff -- https://github.com/apache/spark/pull/9759#r63321521 > "infinity".toDouble, "inf".toDouble are not legal. These non-numeric numbers are case-sensitive, both for Jackson and Scala.
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