Upload UDF in BigQuery using Python API Client

Question

I would like to create a UDF inside a specific dataset in BigQuery. I've tried using the create_table and other API methods from the Python Client but none seem to work.

Is there any method or way to upload a UDF (stored in a file and read it as a string) into BigQuery?

Answer 1

This is my UDF:

$ cat test.udf
CREATE OR REPLACE FUNCTION dataset_name.addFourAndDivideAny(x ANY TYPE, y ANY TYPE) AS ((x + 4) / y);

This is my upload command ran on Cloud Shell (it will ask to authorise):

bq query --nouse_legacy_sql  < test.udf

In python:

from google.cloud import bigquery

client = bigquery.Client()

with open('test.udf', 'r') as file:
     QUERY = file.read().replace('\n', '')

query_job = client.query(QUERY)

I have got the UDF in single line in the file, but you can use multi-lines file as well. Just make sure the QUERY string is properly constructed.