Github user koertkuipers commented on a diff in the pull request:
https://github.com/apache/spark/pull/22123#discussion_r210801081
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/csv/CSVSuite.scala
---
@@ -1603,6 +1603,44 @@ class CSVSuite extends QueryTest with
SharedSQLContext with SQLTestUtils with Te
.exists(msg => msg.getRenderedMessage.contains("CSV header does not
conform to the schema")))
}
+ test("SPARK-25134: check header on parsing of dataset with projection
and column pruning") {
+ withSQLConf(SQLConf.CSV_PARSER_COLUMN_PRUNING.key -> "true") {
+ withTempPath { path =>
+ val dir = path.getAbsolutePath
+ Seq(("a", "b")).toDF("columnA", "columnB").write
+ .format("csv")
+ .option("header", true)
+ .save(dir)
+ checkAnswer(spark.read
+ .format("csv")
+ .option("header", true)
+ .option("enforceSchema", false)
+ .load(dir)
+ .select("columnA"),
+ Row("a"))
+ }
+ }
+ }
+
+ test("SPARK-25134: check header on parsing of dataset with projection
and no column pruning") {
+ withSQLConf(SQLConf.CSV_PARSER_COLUMN_PRUNING.key -> "false") {
--- End diff --
ok will remove
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