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abstract class FileStatusCache extends AnyRef

A cache of the leaf files of partition directories. We cache these files in order to speed up iterated queries over the same set of partitions. Otherwise, each query would have to hit remote storage in order to gather file statistics for physical planning.

Each resolved catalog table has its own FileStatusCache. When the backing relation for the table is refreshed via refreshTable() or refreshByPath(), this cache will be invalidated.

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NoopCache
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Instance Constructors

  1. new FileStatusCache()

Abstract Value Members

  1. abstract def invalidateAll(): Unit

    Invalidates all data held by this cache.

  2. abstract def putLeafFiles(path: Path, leafFiles: Array[FileStatus]): Unit

    Saves the given set of leaf files for a path in this cache.

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  10. def getLeafFiles(path: Path): Option[Array[FileStatus]]

    returns

    the leaf files for the specified path from this cache, or None if not cached.

  11. def hashCode(): Int
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