Github user ericl commented on a diff in the pull request: https://github.com/apache/spark/pull/14690#discussion_r77419510 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/fileSourceInterfaces.scala --- @@ -346,11 +340,30 @@ trait FileCatalog { */ def listFiles(filters: Seq[Expression]): Seq[Partition] + /** Refresh any cached file listings */ + def refresh(): Unit + + /** Sum of table file sizes, in bytes */ + def sizeInBytes: Long +} + +/** + * A [[BasicFileCatalog]] which can enumerate all of the files comprising a relation and, from + * those, infer the relation's partition specification. + */ +trait FileCatalog extends BasicFileCatalog { --- End diff -- What's the motivation behind splitting FileCatalog and BasicFileCatalog? Is it to prevent accidental calls to allFiles()?
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