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.. Licensed to the Apache Software Foundation (ASF) under one
.. or more contributor license agreements. See the NOTICE file
.. distributed with this work for additional information
.. regarding copyright ownership. The ASF licenses this file
.. to you under the Apache License, Version 2.0 (the
.. "License"); you may not use this file except in compliance
.. with the License. You may obtain a copy of the License at
.. http://www.apache.org/licenses/LICENSE-2.0
.. Unless required by applicable law or agreed to in writing,
.. software distributed under the License is distributed on an
.. "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
.. KIND, either express or implied. See the License for the
.. specific language governing permissions and limitations
.. under the License.
.. _status:
=====================
Implementation Status
=====================
The following tables summarize the features available in the various official
Arrow libraries. All libraries currently follow version 1.0.0 of the Arrow
format, or later minor versions that are compatible with version 1.0.0. See
:doc:`./format/Versioning` for details about versioning. Unless otherwise
stated, the Python, R, Ruby and C/GLib libraries follow the C++ Arrow library.
Data Types
==========
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Data type | C++ | Java | Go | JS | C# | Rust | Julia | Swift | nanoarrow |
| (primitive) | | | | | | | | | |
+===================+=======+=======+=======+====+=======+=======+=======+=======+===========+
| Null | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Boolean | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Int8/16/32/64 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| UInt8/16/32/64 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Float16 | ✓ | ✓ (1) | ✓ | ✓ | ✓ (2)| ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Float32/64 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Decimal32 | ✓ | | ✓ | | ✓ | ✓ | | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Decimal64 | ✓ | | ✓ | | ✓ | ✓ | | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Decimal128 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Decimal256 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Date32/64 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Time32/64 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Timestamp | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Duration | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Interval | ✓ | ✓ | ✓ | | ✓ | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Fixed Size Binary | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Binary | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Large Binary | ✓ | ✓ | ✓ | ✓ | \(4) | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Utf8 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Large Utf8 | ✓ | ✓ | ✓ | ✓ | \(4) | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Binary View | ✓ | | ✓ | | ✓ | ✓ | | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Utf8 View | ✓ | | ✓ | | ✓ | ✓ | | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Data type | C++ | Java | Go | JS | C# | Rust | Julia | Swift | nanoarrow |
| (nested) | | | | | | | | | |
+===================+=======+=======+=======+====+=======+=======+=======+=======+===========+
| Fixed Size List | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| List | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Large List | ✓ | ✓ | ✓ | | \(4) | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| List View | ✓ | | ✓ | | ✓ | ✓ | | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Large List View | ✓ | | ✓ | | | ✓ | | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Struct | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Map | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Dense Union | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Sparse Union | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Data type | C++ | Java | Go | JS | C# | Rust | Julia | Swift | nanoarrow |
| (special) | | | | | | | | | |
+===================+=======+=======+=======+====+=======+=======+=======+=======+===========+
| Dictionary | ✓ | ✓ (3) | ✓ | ✓ | ✓ | ✓ (3) | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Extension | ✓ | ✓ | ✓ | | | ✓ | ✓ | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Run-End Encoded | ✓ | | ✓ | | | ✓ | | | ✓ |
+-------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
+-----------------------+-------+-------+-------+------------+-------+-------+-------+-------+
| Canonical | C++ | Java | Go | JavaScript | C# | Rust | Julia | Swift |
| Extension types | | | | | | | | |
+=======================+=======+=======+=======+============+=======+=======+=======+=======+
| Fixed shape tensor | ✓ | | | | | ✓ | | |
+-----------------------+-------+-------+-------+------------+-------+-------+-------+-------+
| Variable shape tensor | | | | | | ✓ | | |
+-----------------------+-------+-------+-------+------------+-------+-------+-------+-------+
| JSON | ✓ | | ✓ | | | ✓ | | |
+-----------------------+-------+-------+-------+------------+-------+-------+-------+-------+
| Opaque | ✓ | ✓ | ✓ | | | ✓ | | |
+-----------------------+-------+-------+-------+------------+-------+-------+-------+-------+
| UUID | ✓ | | ✓ | | | ✓ | | |
+-----------------------+-------+-------+-------+------------+-------+-------+-------+-------+
| 8-bit Boolean | ✓ | | ✓ | | | ✓ | | |
+-----------------------+-------+-------+-------+------------+-------+-------+-------+-------+
| Parquet Variant | | | ✓ | | | | | |
+-----------------------+-------+-------+-------+------------+-------+-------+-------+-------+
Notes:
* \(1) Casting to/from Float16 in Java is not supported.
* \(2) Float16 support in C# is only available when targeting .NET 6+.
* \(3) Nested dictionaries not supported
* \(4) C# large array types are provided to help with interoperability with other libraries,
but these do not support buffers larger than 2 GiB and an exception will be raised if trying to import an array that is too large.
.. seealso::
The :ref:`format_columnar` and the
:ref:`format_canonical_extensions` specification.
IPC Format
==========
+-----------------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| IPC Feature | C++ | Java | Go | JS | C# | Rust | Julia | Swift | nanoarrow |
| | | | | | | | | | |
+=============================+=======+=======+=======+====+=======+=======+=======+=======+===========+
| Arrow stream format | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ (4) |
+-----------------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Arrow file format | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | |
+-----------------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Record batches | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
+-----------------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Dictionaries | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | |
+-----------------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Replacement dictionaries | ✓ | ✓ | ✓ | | | ✓ | ✓ | | |
+-----------------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Delta dictionaries | ✓ (1) | | ✓ (1) | ✓ | ✓ | ✓ | ✓ | | |
+-----------------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Tensors | ✓ | | | | | | | | |
+-----------------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Sparse tensors | ✓ | | | | | | | | |
+-----------------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Buffer compression | ✓ | ✓ (3) | ✓ | | ✓ | ✓ | ✓ | | |
+-----------------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Endianness conversion | ✓ (2) | | ✓ (2) | | | | | | ✓ (2) |
+-----------------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
| Custom schema metadata | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ |
+-----------------------------+-------+-------+-------+----+-------+-------+-------+-------+-----------+
Notes:
* \(1) Delta dictionaries not supported on nested dictionaries
* \(2) Data with non-native endianness can be byte-swapped automatically when reading.
* \(3) LZ4 Codec currently is quite inefficient. ARROW-11901 tracks improving performance.
* \(4) The nanoarrow IPC implementation is only implemented for reading IPC streams.
.. seealso::
The :ref:`format-ipc` specification.
.. _status-flight-rpc:
Flight RPC
==========
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| Flight RPC Transport | C++ | Java | Go | JS | C# | Rust | Julia | Swift |
+============================================+=======+=======+=======+====+=======+=======+=======+=======+
| gRPC_ transport (grpc:, grpc+tcp:) | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| gRPC domain socket transport (grpc+unix:) | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| gRPC + TLS transport (grpc+tls:) | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
Supported features in the gRPC transport:
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| Flight RPC Feature | C++ | Java | Go | JS | C# | Rust | Julia | Swift |
+============================================+=======+=======+=======+====+=======+=======+=======+=======+
| All RPC methods | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| Authentication handlers | ✓ | ✓ | ✓ | | ✓ (1) | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| Call timeouts | ✓ | ✓ | ✓ | | | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| Call cancellation | ✓ | ✓ | ✓ | | | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| Concurrent client calls (2) | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| Custom middleware | ✓ | ✓ | ✓ | | | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| RPC error codes | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
Notes:
* \(1) Support using AspNetCore authentication handlers.
* \(2) Whether a single client can support multiple concurrent calls.
.. seealso::
The :ref:`flight-rpc` specification.
.. _gRPC: https://grpc.io/
Flight SQL
==========
.. note:: Flight SQL is still experimental.
The feature support refers to the client/server libraries only;
databases which implement the Flight SQL protocol in turn will
support/not support individual features.
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| Feature | C++ | Java | Go | JS | C# | Rust | Julia | Swift |
+============================================+=======+=======+=======+====+=======+=======+=======+=======+
| BeginSavepoint | ✓ | ✓ | | | | | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| BeginTransaction | ✓ | ✓ | | | | | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| CancelQuery | ✓ | ✓ | | | | | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| ClosePreparedStatement | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| CreatePreparedStatement | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| CreatePreparedSubstraitPlan | ✓ | ✓ | | | | | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| EndSavepoint | ✓ | ✓ | | | | | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| EndTransaction | ✓ | ✓ | | | | | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| GetCatalogs | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| GetCrossReference | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| GetDbSchemas | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| GetExportedKeys | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| GetImportedKeys | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| GetPrimaryKeys | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| GetSqlInfo | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| GetTables | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| GetTableTypes | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| GetXdbcTypeInfo | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| PreparedStatementQuery | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| PreparedStatementUpdate | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| StatementSubstraitPlan | ✓ | ✓ | | | | | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| StatementQuery | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
| StatementUpdate | ✓ | ✓ | ✓ | | ✓ | ✓ | | |
+--------------------------------------------+-------+-------+-------+----+-------+-------+-------+-------+
.. seealso::
The :doc:`./format/FlightSql` specification.
C Data Interface
================
+-----------------------------+-----+--------+---+------+----+------+--------+------+-------+-----+-------+-----------+
| Feature | C++ | Python | R | Rust | Go | Java | C/GLib | Ruby | Julia | C# | Swift | nanoarrow |
| | | | | | | | | | | | | |
+=============================+=====+========+===+======+====+======+========+======+=======+=====+=======+===========+
| Schema export | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ | | ✓ |
+-----------------------------+-----+--------+---+------+----+------+--------+------+-------+-----+-------+-----------+
| Array export | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ | | ✓ |
+-----------------------------+-----+--------+---+------+----+------+--------+------+-------+-----+-------+-----------+
| Schema import | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ | | ✓ |
+-----------------------------+-----+--------+---+------+----+------+--------+------+-------+-----+-------+-----------+
| Array import | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ | | ✓ |
+-----------------------------+-----+--------+---+------+----+------+--------+------+-------+-----+-------+-----------+
.. seealso::
The :ref:`C Data Interface <c-data-interface>` specification.
C Stream Interface
==================
+-----------------------------+-----+--------+---+------+----+------+--------+------+-------+-----+-------+-----------+
| Feature | C++ | Python | R | Rust | Go | Java | C/GLib | Ruby | Julia | C# | Swift | nanoarrow |
| | | | | | | | | | | | | |
+=============================+=====+========+===+======+====+======+========+======+=======+=====+=======+===========+
| Stream export | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ | ✓ | | ✓ | | ✓ |
+-----------------------------+-----+--------+---+------+----+------+--------+------+-------+-----+-------+-----------+
| Stream import | ✓ | ✓ | ✓ | ✓ | ✓ | | ✓ | ✓ | | ✓ | | ✓ |
+-----------------------------+-----+--------+---+------+----+------+--------+------+-------+-----+-------+-----------+
.. seealso::
The :ref:`C Stream Interface <c-stream-interface>` specification.
Third-Party Data Formats
========================
+-----------------------------+---------+---------+-------+----+-------+-------+-------+-------+
| Format | C++ | Java | Go | JS | C# | Rust | Julia | Swift |
| | | | | | | | | |
+=============================+=========+=========+=======+====+=======+=======+=======+=======+
| Avro | | R | R | | | R/W | | |
+-----------------------------+---------+---------+-------+----+-------+-------+-------+-------+
| CSV | R/W | R (2) | R/W | | | R/W | R/W | |
+-----------------------------+---------+---------+-------+----+-------+-------+-------+-------+
| ORC | R/W | R (1) | | | | | | |
+-----------------------------+---------+---------+-------+----+-------+-------+-------+-------+
| Parquet | R/W | R (2) | R/W | | | R/W | | |
+-----------------------------+---------+---------+-------+----+-------+-------+-------+-------+
Notes:
* *R* = Read supported
* *W* = Write supported
* \(1) Through JNI bindings. (Provided by ``org.apache.arrow.orc:arrow-orc``)
* \(2) Through JNI bindings to Arrow C++ Datasets. (Provided by ``org.apache.arrow:arrow-dataset``)
|
