Github user gengliangwang commented on a diff in the pull request:
https://github.com/apache/spark/pull/21004#discussion_r181283769
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala
---
@@ -552,6 +523,40 @@ case class DataSource(
sys.error(s"${providingClass.getCanonicalName} does not allow
create table as select.")
}
}
+
+ /** Returns an [[InMemoryFileIndex]] that can be used to get partition
schema and file list. */
+ private def createInMemoryFileIndex(globbedPaths: Seq[Path]):
InMemoryFileIndex = {
--- End diff --
No, we can't. In some case we need to check the glob files, while we don't
need to create `InMemoryFileIndex`
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