This is an automated email from the ASF dual-hosted git repository.
agrove pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/arrow-ballista.git
The following commit(s) were added to refs/heads/main by this push:
new e5cce8a2 PyBallista - Python SQL client for Ballista (#970)
e5cce8a2 is described below
commit e5cce8a2d7fc1ffa6e234ea7b1c58d284f4eeb13
Author: Andy Grove <[email protected]>
AuthorDate: Mon Feb 5 07:28:46 2024 -0700
PyBallista - Python SQL client for Ballista (#970)
---
Cargo.toml | 1 +
python/.gitignore | 2 +
python/Cargo.toml | 42 +++++++
python/LICENSE.txt | 202 ++++++++++++++++++++++++++++++++
python/README.md | 64 ++++++++++
python/pyballista/__init__.py | 38 ++++++
python/pyballista/tests/__init__.py | 16 +++
python/pyballista/tests/test_context.py | 26 ++++
python/pyproject.toml | 64 ++++++++++
python/requirements.txt | 2 +
python/src/lib.rs | 117 ++++++++++++++++++
11 files changed, 574 insertions(+)
diff --git a/Cargo.toml b/Cargo.toml
index 5bec57d8..e40faf52 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,6 +26,7 @@ members = [
"benchmarks",
"examples"
]
+exclude = [ "python" ]
resolver = "2"
[workspace.dependencies]
diff --git a/python/.gitignore b/python/.gitignore
new file mode 100644
index 00000000..74486f04
--- /dev/null
+++ b/python/.gitignore
@@ -0,0 +1,2 @@
+venv
+*.so
\ No newline at end of file
diff --git a/python/Cargo.toml b/python/Cargo.toml
new file mode 100644
index 00000000..6a63b6f7
--- /dev/null
+++ b/python/Cargo.toml
@@ -0,0 +1,42 @@
+# 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.
+
+[package]
+name = "pyballista"
+version = "0.12.0"
+homepage = "https://github.com/apache/arrow-ballista";
+repository = "https://github.com/apache/arrow-ballista";
+authors = ["Apache Arrow <[email protected]>"]
+description = "Apache Arrow Ballista Python Client"
+readme = "README.md"
+license = "Apache-2.0"
+edition = "2021"
+rust-version = "1.64"
+include = ["/src", "/pyballista", "/LICENSE.txt", "pyproject.toml",
"Cargo.toml", "Cargo.lock"]
+
+[dependencies]
+ballista = { path = "../ballista/client", version = "0.12.0" }
+datafusion = "35.0.0"
+datafusion-python = "35.0.0"
+pyo3 = { version = "0.20", features = ["extension-module", "abi3",
"abi3-py38"] }
+tokio = { version = "1.35", features = ["macros", "rt", "rt-multi-thread",
"sync"] }
+
+[lib]
+crate-type = ["cdylib"]
+name = "pyballista"
+
+
diff --git a/python/LICENSE.txt b/python/LICENSE.txt
new file mode 100644
index 00000000..d6456956
--- /dev/null
+++ b/python/LICENSE.txt
@@ -0,0 +1,202 @@
+
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+ whether in tort (including negligence), contract, or otherwise,
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+ Licensed 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
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+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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diff --git a/python/README.md b/python/README.md
new file mode 100644
index 00000000..1819a720
--- /dev/null
+++ b/python/README.md
@@ -0,0 +1,64 @@
+<!---
+ 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.
+-->
+
+# PyBallista
+
+Minimal Python client for Ballista.
+
+The goal of this project is to provide a way to run SQL against a Ballista
cluster from Python and collect
+results as PyArrow record batches.
+
+Note that this client currently only provides a SQL API and not a DataFrame
API. A future release will support
+using the DataFrame API from DataFusion's Python bindings to create a logical
plan and then execute that logical plan
+from the Ballista context ([tracking
issue](https://github.com/apache/arrow-ballista/issues/971)).
+
+This project is versioned and released independently from the main Ballista
project and is intentionally not
+part of the default Cargo workspace so that it doesn't cause overhead for
maintainers of the main Ballista codebase.
+
+## Example Usage
+
+```python
+from pyballista import SessionContext
+>>> ctx = SessionContext("localhost", 50050)
+>>> ctx.sql("create external table t stored as parquet location
'/mnt/bigdata/tpch/sf10-parquet/lineitem.parquet'")
+>>> df = ctx.sql("select * from t limit 5")
+>>> df.collect()
+```
+
+## Creating Virtual Environment
+
+```shell
+python3 -m venv venv
+source venv/bin/activate
+pip3 install -r requirements.txt
+```
+
+## Building
+
+```shell
+maturin develop
+```
+
+Note that you can also run `maturin develop --release` to get a release build
locally.
+
+## Testing
+
+```shell
+python3 -m pytest
+```
diff --git a/python/pyballista/__init__.py b/python/pyballista/__init__.py
new file mode 100644
index 00000000..480e9eda
--- /dev/null
+++ b/python/pyballista/__init__.py
@@ -0,0 +1,38 @@
+# 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.
+
+from abc import ABCMeta, abstractmethod
+from typing import List
+
+try:
+ import importlib.metadata as importlib_metadata
+except ImportError:
+ import importlib_metadata
+
+import pyarrow as pa
+
+from .pyballista_internal import (
+ SessionContext,
+ DataFrame
+)
+
+__version__ = importlib_metadata.version(__name__)
+
+__all__ = [
+ "SessionContext",
+ "DataFrame",
+]
diff --git a/python/pyballista/tests/__init__.py
b/python/pyballista/tests/__init__.py
new file mode 100644
index 00000000..13a83393
--- /dev/null
+++ b/python/pyballista/tests/__init__.py
@@ -0,0 +1,16 @@
+# 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.
diff --git a/python/pyballista/tests/test_context.py
b/python/pyballista/tests/test_context.py
new file mode 100644
index 00000000..46e67e10
--- /dev/null
+++ b/python/pyballista/tests/test_context.py
@@ -0,0 +1,26 @@
+# 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.
+from pyballista import SessionContext
+import pytest
+
+def test_create_context():
+ SessionContext("localhost", 50050)
+
+def test_select_one():
+ ctx = SessionContext("localhost", 50050)
+ df = ctx.sql("SELECT 1")
+ df.collect()
\ No newline at end of file
diff --git a/python/pyproject.toml b/python/pyproject.toml
new file mode 100644
index 00000000..71bd5ec2
--- /dev/null
+++ b/python/pyproject.toml
@@ -0,0 +1,64 @@
+# 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.
+
+[build-system]
+requires = ["maturin>=0.15,<0.16"]
+build-backend = "maturin"
+
+[project]
+name = "pyballista"
+description = "Python client for Apache Arrow Ballista Distributed SQL Query
Engine"
+readme = "README.md"
+license = {file = "LICENSE.txt"}
+requires-python = ">=3.6"
+keywords = ["ballista", "sql", "rust", "distributed"]
+classifier = [
+ "Development Status :: 2 - Pre-Alpha",
+ "Intended Audience :: Developers",
+ "License :: OSI Approved :: Apache Software License",
+ "License :: OSI Approved",
+ "Operating System :: MacOS",
+ "Operating System :: Microsoft :: Windows",
+ "Operating System :: POSIX :: Linux",
+ "Programming Language :: Python :: 3",
+ "Programming Language :: Python :: 3.7",
+ "Programming Language :: Python :: 3.8",
+ "Programming Language :: Python :: 3.9",
+ "Programming Language :: Python :: 3.10",
+ "Programming Language :: Python",
+ "Programming Language :: Rust",
+]
+dependencies = [
+ "pyarrow>=11.0.0",
+]
+
+[project.urls]
+homepage = "https://arrow.apache.org/ballista";
+documentation = "https://arrow.apache.org/ballista";
+repository = "https://github.com/apache/arrow-ballista";
+
+[tool.isort]
+profile = "black"
+
+[tool.maturin]
+module-name = "pyballista.pyballista_internal"
+include = [
+ { path = "Cargo.lock", format = "sdist" }
+]
+exclude = [".github/**", "ci/**", ".asf.yaml"]
+# Require Cargo.lock is up to date
+locked = true
diff --git a/python/requirements.txt b/python/requirements.txt
new file mode 100644
index 00000000..f6acb176
--- /dev/null
+++ b/python/requirements.txt
@@ -0,0 +1,2 @@
+pyarrow
+pytest
\ No newline at end of file
diff --git a/python/src/lib.rs b/python/src/lib.rs
new file mode 100644
index 00000000..186a570e
--- /dev/null
+++ b/python/src/lib.rs
@@ -0,0 +1,117 @@
+// 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.
+
+use datafusion::arrow::pyarrow::ToPyArrow;
+use datafusion::prelude::DataFrame;
+use pyo3::exceptions::PyException;
+use pyo3::prelude::*;
+use std::future::Future;
+use std::sync::Arc;
+use tokio::runtime::Runtime;
+
+use ballista::prelude::*;
+
+/// PyBallista SessionContext
+#[pyclass(name = "SessionContext", module = "pyballista", subclass)]
+pub struct PySessionContext {
+ ctx: BallistaContext,
+}
+
+#[pymethods]
+impl PySessionContext {
+ #[new]
+ pub fn new(host: &str, port: u16, py: Python) -> PyResult<Self> {
+ let config = BallistaConfig::new().unwrap();
+ let ballista_context = BallistaContext::remote(host, port, &config);
+ let ctx = wait_for_future(py, ballista_context).map_err(to_pyerr)?;
+ Ok(Self { ctx })
+ }
+
+ pub fn sql(&mut self, query: &str, py: Python) -> PyResult<PyDataFrame> {
+ let result = self.ctx.sql(query);
+ let df = wait_for_future(py, result)?;
+ Ok(PyDataFrame::new(df))
+ }
+}
+
+#[pyclass(name = "DataFrame", module = "pyballista", subclass)]
+#[derive(Clone)]
+pub struct PyDataFrame {
+ /// DataFusion DataFrame
+ df: Arc<DataFrame>,
+}
+
+impl PyDataFrame {
+ /// creates a new PyDataFrame
+ pub fn new(df: DataFrame) -> Self {
+ Self { df: Arc::new(df) }
+ }
+}
+
+#[pymethods]
+impl PyDataFrame {
+ /// Executes the plan, returning a list of `RecordBatch`es.
+ /// Unless some order is specified in the plan, there is no
+ /// guarantee of the order of the result.
+ fn collect(&self, py: Python) -> PyResult<Vec<PyObject>> {
+ let batches = wait_for_future(py, self.df.as_ref().clone().collect())?;
+ // cannot use PyResult<Vec<RecordBatch>> return type due to
+ // https://github.com/PyO3/pyo3/issues/1813
+ batches.into_iter().map(|rb| rb.to_pyarrow(py)).collect()
+ }
+}
+
+fn wait_for_future<F: Future>(py: Python, f: F) -> F::Output
+where
+ F: Send,
+ F::Output: Send,
+{
+ let runtime: &Runtime = &get_tokio_runtime(py).0;
+ py.allow_threads(|| runtime.block_on(f))
+}
+
+fn get_tokio_runtime(py: Python) -> PyRef<TokioRuntime> {
+ let ballista = py.import("pyballista._internal").unwrap();
+ let tmp = ballista.getattr("runtime").unwrap();
+ match tmp.extract::<PyRef<TokioRuntime>>() {
+ Ok(runtime) => runtime,
+ Err(_e) => {
+ let rt = TokioRuntime(tokio::runtime::Runtime::new().unwrap());
+ let obj: &PyAny = Py::new(py, rt).unwrap().into_ref(py);
+ obj.extract().unwrap()
+ }
+ }
+}
+
+fn to_pyerr(err: BallistaError) -> PyErr {
+ PyException::new_err(err.to_string())
+}
+
+#[pyclass]
+pub(crate) struct TokioRuntime(tokio::runtime::Runtime);
+
+#[pymodule]
+fn pyballista_internal(_py: Python, m: &PyModule) -> PyResult<()> {
+ // Register the Tokio Runtime as a module attribute so we can reuse it
+ m.add(
+ "runtime",
+ TokioRuntime(tokio::runtime::Runtime::new().unwrap()),
+ )?;
+ m.add_class::<PySessionContext>()?;
+ m.add_class::<PyDataFrame>()?;
+ Ok(())
+}
