BigQuery Schedule Pub/Sub Notification Error - google-bigquery

Question

I am trying to schedule a query from BQ console with pub/sub notification.
The query is below.
INSERT INTO `myproject.my_ds.mytable_test`(Operator, Technology, Freq_Band, Sector)
SELECT Operator, Technology, Freq_Band, Sector FROM `myproject.my_ds.mytable` WHERE Freq_Band = '800' ;
The topic is already created. The custom service account has below permissions.
BigQuery Data Editor
BigQuery User
Logs Writer
Monitoring Metric Writer
Pub/Sub Publisher
The error is "User not authorized to perform this action". The screenshot is given below.
Please help.
Regards,
Santanu

Answer 1

The account you are using needs more privileges.You can see more documentation about the privileges you need to schedule a query with BigQuery.
The privileges you need to schedule a query are:
bigquery.transfers.update or both bigquery.jobs.create and
bigquery.transfers.get to create the transfer
bigquery.jobs.create to run the scheduled query
bigquery.datasets.update on the target dataset
To modify a scheduled query, you must be the creator of the schedule and have the following permissions:
bigquery.jobs.create
Bigquery.transfers.update
You can see the predefined roles and permission you need. You can see more documentation.
BigQuery ML
BigQuery Data Transfer Service
BigQuery BI Engine
EDIT
Hi, If you have admin permission for BigQuery, you need more privileges for Pub/Sub notifications. You can see more documentation about it.
You need to have sufficient permissions on the bucket you wish to monitor:
If you own the project that contains the bucket, you most likely have
the necessary permission.
If you use IAM, you should have storage.buckets.update permission.
If you use ACLs, you should have OWNER permission.
Have sufficient permissions on the project that will receive notifications:
If you own the project that will receive notifications, you most
likely have the necessary permission.
If you plan to create topics for receiving notifications, you should
have pubsub.topics.create permission.
Whether you plan to use new or existing topics, you should have
pubsub.topics.setIamPolicy permission. If you create a topic, you
typically have pubsub.topics.setIamPolicy for it.
Have an existing Pub/Sub topic that you wish to send notifications to.
Get the email address of the service agent associated with the project that contains your Cloud Storage bucket.
Use the email address that you obtained in the previous step to give the service agent the IAM role pubsub.publisher for the desired Pub/Sub topic.