org.apache.spark.sql.execution.datasources

FileCatalog

trait FileCatalog extends AnyRef

An interface for objects capable of enumerating the files that comprise a relation as well as the partitioning characteristics of those files.

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ListingFileCatalog, MetadataLogFileCatalog, PartitioningAwareFileCatalog
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Abstract Value Members

  1. abstract def allFiles(): Seq[FileStatus]

    Returns all the valid files.

  2. abstract def listFiles(filters: Seq[Expression]): Seq[Partition]

    Returns all valid files grouped into partitions when the data is partitioned.

    Returns all valid files grouped into partitions when the data is partitioned. If the data is unpartitioned, this will return a single partition with no partition values.

    filters

    The filters used to prune which partitions are returned. These filters must only refer to partition columns and this method will only return files where these predicates are guaranteed to evaluate to true. Thus, these filters will not need to be evaluated again on the returned data.

  3. abstract def partitionSpec(): PartitionSpec

    Returns the specification of the partitions inferred from the data.

  4. abstract def paths: Seq[Path]

    Returns the list of input paths from which the catalog will get files.

  5. abstract def refresh(): Unit

    Refresh the file listing

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