Please make sure you have searched for information in the following guides.
Library Name
@google-cloud/bigquery
A screenshot that you have tested with "Try this API".
There's an identical issue that was resolved in the go library googleapis/google-cloud-go#13788.
I dug deep into the source with the debugger, and it seems that the library is attempting to use a feature that has not yet released in the api.
Here's the simplest query I could replicate in the api explorer. What's odd is that the explorer also suggests timestampOutputFormat as a valid option in the autocomplete. However, it doesn't seem to be released yet.

Link to the code that reproduces this issue. A link to a public Github Repository or gist with a minimal reproduction.
https://gist.github.com/djohnson-aperture/1b16574011478dae9137aa1adca44210
A step-by-step description of how to reproduce the issue, based on the linked reproduction.
Any basic query using (new BigQuery()).query() seems to have the same issue.
(new BigQuery()).query('select 1;') is enough to trigger the error.
A clear and concise description of what the bug is, and what you expected to happen.
Any query throws a 400 error with the above mentioned error code.
A clear and concise description WHY you expect this behavior, i.e., was it a recent change, there is documentation that points to this behavior, etc. **
I just expect a basic query to work...
Please make sure you have searched for information in the following guides.
Library Name
@google-cloud/bigquery
A screenshot that you have tested with "Try this API".
There's an identical issue that was resolved in the go library googleapis/google-cloud-go#13788.

I dug deep into the source with the debugger, and it seems that the library is attempting to use a feature that has not yet released in the api.
Here's the simplest query I could replicate in the api explorer. What's odd is that the explorer also suggests
timestampOutputFormatas a valid option in the autocomplete. However, it doesn't seem to be released yet.Link to the code that reproduces this issue. A link to a public Github Repository or gist with a minimal reproduction.
https://gist.github.com/djohnson-aperture/1b16574011478dae9137aa1adca44210
A step-by-step description of how to reproduce the issue, based on the linked reproduction.
Any basic query using
(new BigQuery()).query()seems to have the same issue.(new BigQuery()).query('select 1;')is enough to trigger the error.A clear and concise description of what the bug is, and what you expected to happen.
Any query throws a 400 error with the above mentioned error code.
A clear and concise description WHY you expect this behavior, i.e., was it a recent change, there is documentation that points to this behavior, etc. **
I just expect a basic query to work...