gengliangwang commented on a change in pull request #24369: [SPARK-27459][SQL]
Revise the exception message of schema inference failure in file source V2
URL: https://github.com/apache/spark/pull/24369#discussion_r275168989
##########
File path:
sql/core/src/test/scala/org/apache/spark/sql/test/DataFrameReaderWriterSuite.scala
##########
@@ -428,7 +428,7 @@ class DataFrameReaderWriterSuite extends QueryTest with
SharedSQLContext with Be
val message = intercept[AnalysisException] {
testRead(spark.read.csv(), Seq.empty, schema)
}.getMessage
- assert(message.toLowerCase(Locale.ROOT).contains("unable to infer schema
for csv"))
+ assert(message.contains("Unable to infer schema for CSV. It must be
specified manually."))
Review comment:
Because both V1 and V2 show exactly the same message.
`toLowerCase(Locale.ROOT)` was added in the migration of CSV V2
https://github.com/apache/spark/pull/24005/files#diff-b9ddfbc9be8d83ecf100b3b8ff9610b9R431
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