BigQuery

Results append into a date-partitioned table. The actor’s contract version rides along as a column, so a query can pin itself to one shape and stay correct across a wire bump.

That column is the whole trick. Without it, a contract change silently mixes two shapes in one table and every downstream query becomes a guess.

What it does

• Appends via the Storage Write API — no staging files, no load jobs to babysit.
• Partitions on run date, clusters on the actor’s natural key.
• Adds _contract_version and _run_id to every row.

What you need

A dataset and a service account with roles/bigquery.dataEditor on it.