Method filename

be/src/exec/scanner-context.h:155–155

    bool eof() const { return file_offset() == file_len_; }

    const char* filename() { return scan_range_->file(); }
    const io::ScanRange* scan_range() { return scan_range_; }
    const HdfsFileDesc* file_desc() { return file_desc_; }
    int64_t reservation() const { return reservation_; }