Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/14957#discussion_r77849592 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileSourceStrategy.scala --- @@ -97,7 +98,16 @@ object FileSourceStrategy extends Strategy with Logging { dataColumns .filter(requiredAttributes.contains) .filterNot(partitionColumns.contains) - val outputSchema = readDataColumns.toStructType + val outputSchema = if (fsRelation.sqlContext.conf.isParquetNestColumnPruning) { --- End diff -- Oh, I meant enabling/disabling affects the other data sources. I see it's disabled by default. I ran ,for example, `JsonSuite` after enabling this option (after leaving the comment above) and saw some failures related with nested structures.
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