True transaction semantics are rare in OLAP world. As for BigQuery: > If a transaction mutates (update or deletes) rows in a table, then other transactions or

True transaction semantics are rare in OLAP world. As for BigQuery: > If a transaction mutates (update or deletes) rows in a table, then other transactions or DML statements that mutate rows in the same table cannot run concurrently. Kind of a non-starter.