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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. | ||
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# RECIPE STARTS HERE | ||
#: After verifying the basic driver functionality, we can use the | ||
#: ``adbc_driver_manager`` Python package's built-in dbapi implementation | ||
#: to expose a ready-to-go Pythonic database API. This is also useful for | ||
#: high-level testing! | ||
#: | ||
#: First, we'll import pathlib for a few path calculations and the | ||
#: ``adbc_driver_manager``'s ``dbapi`` module: | ||
from pathlib import Path | ||
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from adbc_driver_manager import dbapi | ||
#: Next, we'll define a ``connect()`` function that wraps ``dbapi.connect()`` | ||
#: with the location of the shared library we built using ``cmake`` in the previous | ||
#: section. For the purposes of our tutorial, this will be in the CMake ``build/`` | ||
#: directory. | ||
def connect(uri: str): | ||
build_dir = Path(__file__).parent / "build" | ||
for lib in [ | ||
"libdriver_example.dylib", | ||
"libdriver_example.so", | ||
"driver_example.dll", | ||
]: | ||
driver_lib = build_dir / lib | ||
if driver_lib.exists(): | ||
return dbapi.connect( | ||
driver=str(driver_lib.resolve()), db_kwargs={"uri": uri} | ||
) | ||
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raise RuntimeError("Can't find driver shared object") | ||
#: Next, we can give our driver a go! The two pieces we implemented in the driver | ||
#: were the "bulk ingest" feature and "select all from", so let's see if it works! | ||
if __name__ == "__main__": | ||
import pyarrow | ||
import os | ||
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with connect(uri=Path(__file__).parent.as_uri()) as con: | ||
data = pyarrow.table({"col": [1, 2, 3]}) | ||
with con.cursor() as cur: | ||
cur.adbc_ingest("example.arrows", data, mode="create") | ||
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with con.cursor() as cur: | ||
cur.execute("SELECT * FROM example.arrows") | ||
print(cur.fetchall()) | ||
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os.unlink(Path(__file__).parent / "example.arrows") |
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