Using Google Workflow to query a Google Sheet through Bigquery

Question

I am using a cloud workflow orchestration to query a Bigquery table, which is connected to a Google Sheet, on google drive as an external table.

So cloud workflow uses service account <SA_ID>@<ProjectName>.iam.gserviceaccount.com to query the said bigquery table. I have provided Editor access to the SA in the google sheet, and Admin access to the SA in Bigquery. While the workflow is working with a native bigquery table, when querying a table conencted to google sheet I get following error Access Denied: BigQuery BigQuery: Permission denied while getting Drive credentials. Is a service account not supposed to access a google sheet?

Answer 1

Posting this as a community wiki so that others can benefit from it.

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As mentioned by @guillaume blaquiere:

Pretty similar to this question and for now, you can't achieve this. Connection to Google Drive is not managed by external connection, and therefore there isn't a dedicated service account to achieve the connection. Permission denied when querying a GCP BigQuery Table that is connected to Google Sheets with NodeJS

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