Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/21657#discussion_r201172532 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/UnivocityParser.scala --- @@ -38,24 +38,28 @@ class UnivocityParser( requiredSchema: StructType, val options: CSVOptions) extends Logging { require(requiredSchema.toSet.subsetOf(dataSchema.toSet), - "requiredSchema should be the subset of schema.") + "requiredSchema should be the subset of dataSchema.") --- End diff -- Nit: generally, we should consider adding the schema into the message.
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