Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/17973#discussion_r116354253 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/csv/CSVSuite.scala --- @@ -622,6 +622,31 @@ class CSVSuite extends QueryTest with SharedSQLContext with SQLTestUtils { } } + test("save tsv with tsv suffix") { + withTempDir { dir => + val csvDir = new File(dir, "csv").getCanonicalPath + val cars = spark.read + .format("csv") + .option("header", "true") + .load(testFile(carsFile)) + + cars.coalesce(1).write + .option("header", "true") + .option("fileExtension", ".tsv") + .option("delimiter", "\t") --- End diff -- I guess the whole API and implementation is called "CSV" still. Of course, you can already read/write files with different names and different delimiters. Does this matter enough to make a new option? what if I delimit with, eh, null characters?
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