Is it possible to put EXECUTE IMMEDIATE and USING into Variable in Python - sql

Question

This is a continuous of previous post .
How to get result from BigQuery based on user input parameters .
I tried to use EXECUTE IMMEDIATE and USING as these article say.
https://cloud.google.com/bigquery/docs/parameterized-queries
https://towardsdatascience.com/how-to-use-dynamic-sql-in-bigquery-8c04dcc0f0de
But when I run the sql , I got syntax error . I'd like to get my sql checked . I guess this error is caused by the line breaks but I want to do that for the readability . Sorry for my poor coding skill . Could you give me advice ??
I'm little bit worry about BigQuery doesn't support dynamic parameter in Python. Because the article above seems to use these statement in Console not in Python .
The error
File "/srv/main.py", line 14 SELECT EXISTS(SELECT 1
SyntaxError: invalid syntax
SQL
query = """EXECUTE IMMEDIATE format("""
SELECT EXISTS(SELECT 1
FROM `test-266778.conversion_log.conversion_log_2020*` as p
WHERE p.luid = #request_luid AND orderid != '' limit 1000)""")"""
USING "request_luid" as request_luid;
/home/user/api_dev/main.py
from flask import Flask, request, jsonify
from google.cloud import bigquery
app = Flask(__name__)
#app.route('/')
def get_request():
request_luid = request.args.get('luid') or ''
client = bigquery.Client()
query = """EXECUTE IMMEDIATE format("""
SELECT EXISTS(SELECT 1
FROM `test-266778.conversion_log.conversion_log_2020*` as p
WHERE p.luid = #request_luid AND orderid != '' limit 1000)""")"""
USING "request_luid" as request_luid;
job_config = bigquery.QueryJobConfig(
query_parameters=[
bigquery.ScalarQueryParameter("request_luid", "STRING", request_luid)
]
)
query_job = client.query(query, job_config=job_config)
query_res = query_job.result()
first_row = next(iter(query_job.result()))
for row in query_res:
return str(row)
#return jsonify({request_luid:query_res.total_rows})
if __name__ == "__main__":
app.run()

Answer 1

You can try this:
def get_request():
request_luid = request.args.get("luid") or ""
client = bigquery.Client()
query = """SELECT EXISTS(
SELECT 1
FROM `test-266778.conversion_log.conversion_log_2020*` as p
WHERE p.luid = {}
AND p.orderid is not null limit 1000)""".format(request_luid)
query_job = client.query(query)
query_res = query_job.result()
first_row = next(iter(query_job.result()))
for row in query_res:
return str(row)
Notes: If the luid is non-numeric, then use '{}'.

Answer 2

You can try this:
EXECUTE IMMEDIATE
"""SELECT EXISTS(SELECT 1 FROM `test-266778.conversion_log.conversion_log_2020*` WHERE luid = ? AND orderid is not null limit 1000)"""
USING
"string-value";
For numeric input value, don't use double quotes