[Feature] dbt manage multiple fields as primary key about dbt-bigquery

[dbeatty10]

I don't think we'd be likely to convert primary key declarations from the column level to the model level for dbt-bigquery.

If we did, we'd probably do it within dbt-core so it applied to all adapters and not just dbt-bigquery.

So for now, I'm going to close in this favor of discussing the possibility of making an update to dbt-docs instead:

• dbt-labs/dbt-docs#507

I'll see you over in dbt-labs/dbt-docs#507 to discuss further!