Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/18250#discussion_r121567491
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/csv/CSVSuite.scala
---
@@ -1174,4 +1174,33 @@ class CSVSuite extends QueryTest with
SharedSQLContext with SQLTestUtils {
}
}
}
+
+ test("SPARK-21024 CSV parser mode controls parser exceptions") {
+ withTempPath { path =>
+ Seq("0,1", "0,1,2,3").toDF().write.text(path.getAbsolutePath)
+
+ Seq(false).foreach { wholeFile =>
+ val msg = intercept[SparkException] {
+ spark.read.format("csv")
+ .schema("a INT, b INT")
+ .option("maxColumns", "2")
+ .option("mode", "FAILFAST")
+ .option("wholeFile", wholeFile)
+ .load(path.getAbsolutePath)
+ .collect
+ }.getMessage
+ assert(msg.contains("Number of columns processed may have exceeded
limit of 2 columns."))
+
+ val columnNameOfCorruptRecord = "_unparsed"
+ val df = spark.read.format("csv")
+ .schema(s"a INT, b INT, $columnNameOfCorruptRecord STRING")
+ .option("maxColumns", "2")
+ .option("mode", "PERMISSIVE")
+ .option("columnNameOfCorruptRecord", columnNameOfCorruptRecord)
+ .option("wholeFile", wholeFile)
+ .load(path.getAbsolutePath)
+ checkAnswer(df, Row(0, 1, null) :: Row(null, null, "0,1,2,") ::
Nil)
--- End diff --
@HyukjinKwon weird behaviour..., when we set `maxColumns` in a Univocity
parser, it seems `currentParsedContent` returns the (`maxColumns` + 1) elements
in inputs.
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