Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/14803#discussion_r79394143
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala
---
@@ -197,10 +197,13 @@ case class DataSource(
SparkHadoopUtil.get.globPathIfNecessary(qualified)
}.toArray
val fileCatalog = new ListingFileCatalog(sparkSession, globbedPaths,
options, None)
+ val partitionCols =
fileCatalog.partitionSpec().partitionColumns.fields
format.inferSchema(
sparkSession,
caseInsensitiveOptions,
- fileCatalog.allFiles())
+ fileCatalog.allFiles()).map { inferredSchema =>
--- End diff --
The wrapping threw me off for a minute. You might consider introducing an
extra variable for the result of inferSchema. Also does
`.map(partitionCols.foldLeft(_)((struct, field) => struct.add(field)))` work?
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