Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/16928#discussion_r102366771 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/UnivocityParser.scala --- @@ -45,24 +46,41 @@ private[csv] class UnivocityParser( // A `ValueConverter` is responsible for converting the given value to a desired type. private type ValueConverter = String => Any + private val corruptFieldIndex = schema.getFieldIndex(options.columnNameOfCorruptRecord) + corruptFieldIndex.foreach { corrFieldIndex => + require(schema(corrFieldIndex).dataType == StringType, + "A field for corrupt records must have a string type") + require(schema(corrFieldIndex).nullable, "A field for corrupt must be nullable") + } + + private val inputSchema = StructType(schema.filter(_.name != options.columnNameOfCorruptRecord)) + CSVUtils.verifySchema(inputSchema) --- End diff -- It seems `verifySchema` is being called duplicatedly (https://github.com/apache/spark/pull/16928/files/4eed4a4bea927c6365dac2e2734c895a0a1a0026#diff-a549ac2e19ee7486911e2e6403444d9dR99)
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