feat: add example of reading parquet from s3 (apache#460)

mesejo · web-flow · commit 9c643bf2ae63 · 2023-08-22T07:44:55.000-06:00
diff --git a/examples/sql-parquet-s3.py b/examples/sql-parquet-s3.py
@@ -0,0 +1,39 @@
+# 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.
+
+import os
+import datafusion
+from datafusion.object_store import AmazonS3
+
+region = "us-east-1"
+bucket_name = "yellow-trips"
+
+s3 = AmazonS3(
+    bucket_name=bucket_name,
+    region=region,
+    access_key_id=os.getenv("AWS_ACCESS_KEY_ID"),
+    secret_access_key=os.getenv("AWS_SECRET_ACCESS_KEY"),
+)
+
+ctx = datafusion.SessionContext()
+path = f"s3://{bucket_name}/"
+ctx.register_object_store(path, s3)
+
+ctx.register_parquet("trips", path)
+
+df = ctx.sql("select count(passenger_count) from trips")
+df.show()
