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Original file line number Diff line number Diff line change
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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.

"""
Example Airflow DAG for Google Cloud Dataflow service
"""
import os

from airflow import models
from airflow.providers.google.cloud.operators.dataflow import DataflowStartSqlJobOperator
from airflow.utils.dates import days_ago

GCP_PROJECT_ID = os.environ.get("GCP_PROJECT_ID", "example-project")

BQ_SQL_DATASET = os.environ.get("DATAFLOW_BQ_SQL_DATASET", "airflow_dataflow_samples")
BQ_SQL_TABLE_INPUT = os.environ.get("BQ_SQL_TABLE_INPUT", "beam_input")
BQ_SQL_TABLE_OUTPUT = os.environ.get("BQ_SQL_TABLE_OUTPUT", "beam_output")
DATAFLOW_SQL_JOB_NAME = os.environ.get("DATAFLOW_SQL_JOB_NAME", "dataflow-sql")
DATAFLOW_SQL_LOCATION = os.environ.get("DATAFLOW_SQL_LOCATION", "us-west1")

with models.DAG(
dag_id="example_gcp_dataflow_sql",
start_date=days_ago(1),
schedule_interval=None, # Override to match your needs
tags=['example'],
) as dag_sql:
start_sql = DataflowStartSqlJobOperator(
task_id="start_sql_query",
job_name=DATAFLOW_SQL_JOB_NAME,
query=f"""
SELECT
sales_region as sales_region,
count(state_id) as count_state
FROM
bigquery.table.`{GCP_PROJECT_ID}`.`{BQ_SQL_DATASET}`.`{BQ_SQL_TABLE_INPUT}`
WHERE state_id >= @state_id_min
GROUP BY sales_region;
""",
options={
"bigquery-project": GCP_PROJECT_ID,
"bigquery-dataset": BQ_SQL_DATASET,
"bigquery-table": BQ_SQL_TABLE_OUTPUT,
"bigquery-write-disposition": "write-truncate",
"parameter": "state_id_min:INT64:2",
},
location=DATAFLOW_SQL_LOCATION,
do_xcom_push=True,
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Just a note, I can review Dataflow aspects but not very familiar with Airflow. For example I am not sure what do_xcom_push is. It would be good to get an airflow review as well.

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I still asked @jaketfI to review. Before this change is merged, it will also be reviewed by at least one Apache Airflow commiter. .

)
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