Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/18356#discussion_r122874997
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala
---
@@ -181,6 +182,10 @@ case class DataSource(
throw new AnalysisException(
s"Unable to infer schema for $format. It must be specified
manually.")
}
+
+ SchemaUtils.checkSchemaColumnNameDuplication(
+ dataSchema, "the datasource",
sparkSession.sessionState.conf.caseSensitiveAnalysis)
--- End diff --
This is the change we need for 2.2
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