primary: the first query of a D1 session goes to the primary and the
session continues in sequence. This is not promised to be primary-only for
the whole operation unless the adapter says so.
session: resume from bookmarks, keyed by database id; with none, the first
query goes to any instance (first-unconstrained). Needs a provider with
sessions, otherwise the call throws CONSISTENCY_UNSUPPORTED.
eventual: unconstrained. Every provider accepts it.
Writes ignore it. Leaving it off keeps the call exactly as it was.
Read guarantee a caller asks for, per call.
primary: the first query of a D1 session goes to the primary and the session continues in sequence. This is not promised to be primary-only for the whole operation unless the adapter says so.session: resume frombookmarks, keyed by database id; with none, the first query goes to any instance (first-unconstrained). Needs a provider with sessions, otherwise the call throwsCONSISTENCY_UNSUPPORTED.eventual: unconstrained. Every provider accepts it.Writes ignore it. Leaving it off keeps the call exactly as it was.