ENH: add possibility to pass labels

[nicoa]

As far as I see pandas-gbq currently doesn't support passing labels.

The underlying google-cloud-bigquery package technically supports this both for queries as well as for tables from what I can see for example here.

Would this be an option for you to implement / support? Or is it already supported and I'm not finding it in the documentation?

Thanks for your support!

[tswast]

For queries, you should be able to fall back to the REST API (https://cloud.google.com/bigquery/docs/reference/rest/v2/Job#JobConfiguration.FIELDS.labels) by populating the configuration argument.

https://github.com/pydata/pandas-gbq/blob/d251db03b159447331ac9ae63e13d295d75bad70/tests/system/test_gbq.py#L595-L631

For load jobs, #313 (comment) is currently open for this support.

[nicoa]

Great, thanks! Unfortunately we rely mainly on to_gbq, but good to know this is already opened.

Will close this for now until experiencing problems.

Thanks for your support! :-)