python-bigquery/samples/query_script.py at main · googleapis/python-bigquery · GitHub

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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

# 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 query_script() -> None:

# [START bigquery_query_script]

from google.cloud import bigquery

# Construct a BigQuery client object.

client = bigquery.Client()

# Run a SQL script.

sql_script = """

-- Declare a variable to hold names as an array.

DECLARE top_names ARRAY<STRING>;

-- Build an array of the top 100 names from the year 2017.

SET top_names = (

SELECT ARRAY_AGG(name ORDER BY number DESC LIMIT 100)

FROM `bigquery-public-data.usa_names.usa_1910_2013`

WHERE year = 2000

);

-- Which names appear as words in Shakespeare's plays?

SELECT

name AS shakespeare_name

FROM UNNEST(top_names) AS name

WHERE name IN (

SELECT word

FROM `bigquery-public-data.samples.shakespeare`

);

"""

parent_job = client.query(sql_script)

# Wait for the whole script to finish.

rows_iterable = parent_job.result()

print("Script created {} child jobs.".format(parent_job.num_child_jobs))

# Fetch result rows for the final sub-job in the script.

rows = list(rows_iterable)

print(

"{} of the top 100 names from year 2000 also appear in Shakespeare's works.".format(

len(rows)

)

# Fetch jobs created by the SQL script.

child_jobs_iterable = client.list_jobs(parent_job=parent_job)

for child_job in child_jobs_iterable:

child_rows = list(child_job.result())

print(

"Child job with ID {} produced {} row(s).".format(

child_job.job_id, len(child_rows)

)

# [END bigquery_query_script]

python-bigquery/samples/query_script.py at main · googleapis/python-bigquery · GitHub

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