Optional. Automatically commits the transaction after the pipeline has been executed. Only permitted in combination with transaction or new_transaction.

Run the query within an already active transaction. The value here is the opaque transaction ID to execute the query in.

Execute the pipeline in a snapshot transaction at the given time. This must be a microsecond precision timestamp within the past one hour, or if Point-in-Time Recovery is enabled, can additionally be a whole minute timestamp within the past 7 days.