cudf.read_orc#

cudf.read_orc(filepath_or_buffer, engine='cudf', columns=None, filters=None, stripes=None, skiprows=None, num_rows=None, use_index=True, timestamp_type=None, use_python_file_object=True, storage_options=None, bytes_per_thread=None)#

Load an ORC dataset into a DataFrame

Parameters:

filepath_or_bufferstr, path object, bytes, or file-like object: Either a path to a file (a str, pathlib.Path, or py._path.local.LocalPath), URL (including http, ftp, and S3 locations), Python bytes of raw binary data, or any object with a read() method (such as builtin open() file handler function or BytesIO).
engine{ ‘cudf’, ‘pyarrow’ }, default ‘cudf’: Parser engine to use.
columnslist, default None: If not None, only these columns will be read from the file.
filterslist of tuple, list of lists of tuples default None: If not None, specifies a filter predicate used to filter out row groups using statistics stored for each row group as Parquet metadata. Row groups that do not match the given filter predicate are not read. The predicate is expressed in disjunctive normal form (DNF) like [[(‘x’, ‘=’, 0), …], …]. DNF allows arbitrary boolean logical combinations of single column predicates. The innermost tuples each describe a single column predicate. The list of inner predicates is interpreted as a conjunction (AND), forming a more selective and multiple column predicate. Finally, the outermost list combines these filters as a disjunction (OR). Predicates may also be passed as a list of tuples. This form is interpreted as a single conjunction. To express OR in predicates, one must use the (preferred) notation of list of lists of tuples.
stripes: list, default None: If not None, only these stripe will be read from the file. Stripes are concatenated with index ignored.
skiprowsint, default None: If not None, the number of rows to skip from the start of the file. This parameter is deprecated.
num_rowsint, default None: If not None, the total number of rows to read. This parameter is deprecated.
use_indexbool, default True: If True, use row index if available for faster seeking.
use_python_file_objectboolean, default True: If True, Arrow-backed PythonFile objects will be used in place of fsspec AbstractBufferedFile objects at IO time. This option is likely to improve performance when making small reads from larger ORC files.
storage_optionsdict, optional, default None: Extra options that make sense for a particular storage connection, e.g. host, port, username, password, etc. For HTTP(S) URLs the key-value pairs are forwarded to urllib.request.Request as header options. For other URLs (e.g. starting with “s3://”, and “gcs://”) the key-value pairs are forwarded to fsspec.open. Please see fsspec and urllib for more details.
bytes_per_threadint, default None: Determines the number of bytes to be allocated per thread to read the files in parallel. When there is a file of large size, we get slightly better throughput by decomposing it and transferring multiple “blocks” in parallel (using a python thread pool). Default allocation is 268435456 bytes. This parameter is functional only when use_python_file_object=False.

Returns:

DataFrame