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# Copyright 2019 Google LLC
#
# 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
#
# https://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.
def create_routine_ddl(routine_id: str) -> None:
# [START bigquery_create_routine_ddl]
from google.cloud import bigquery
# Construct a BigQuery client object.
client = bigquery.Client()
# TODO(developer): Choose a fully-qualified ID for the routine.
# routine_id = "my-project.my_dataset.my_routine"
sql = """
CREATE FUNCTION `{}`(
arr ARRAY<STRUCT<name STRING, val INT64>>
) AS (
(SELECT SUM(IF(elem.name = "foo",elem.val,null)) FROM UNNEST(arr) AS elem)
)
""".format(
routine_id
)
query_job = client.query(sql) # Make an API request.
query_job.result() # Wait for the job to complete.
print("Created routine {}".format(query_job.ddl_target_routine))
# [END bigquery_create_routine_ddl]
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