Package org.apache.iceberg

Interface FileScanTask

  • All Superinterfaces:
    ScanTask, java.io.Serializable
    All Known Subinterfaces:
    DataTask
    public interface FileScanTask
extends ScanTask
    A scan task over a range of a single file.

    • Method Detail

      • file

        DataFile file()
        The file to scan.
        Returns:
        the file to scan

      • spec

        PartitionSpec spec()
        The spec used to store this file.
        Returns:
        the partition spec from this file's manifest

      • start

        long start()
        The starting position of this scan range in the file.
        Returns:
        the start position of this scan range

      • length

        long length()
        The number of bytes to scan from the start() position in the file.
        Returns:
        the length of this scan range in bytes

      • residual

        Expression residual()
        Returns the residual expression that should be applied to rows in this file scan.

        The residual expression for a file is a filter expression created from the scan's filter, inclusive any predicates that are true or false for the entire file removed, based on the file's partition data.

        Returns:
        a residual expression to apply to rows from this scan

      • split

        java.lang.Iterable<FileScanTask> split​(long splitSize)
        Splits this scan task into component scan tasks, each of splitSize size
        Parameters:
        splitSize - The size of a component scan task
        Returns:
        an Iterable of scan tasks