-- Outbound backfill: history fetched from other servers for a room this
-- server joined part-way through.
--
-- roomserver_events.stream_ordering is the order clients are shown a room
-- in, and the stream_ordering counter only ever goes up: every event it
-- numbers arrived after the ones before it. Backfilled history arrives
-- after everything too, but belongs before all of it. So it is numbered by
-- a second counter that runs the other way — from -1 downwards — and every
-- backfilled event sits below every event this server held when it came.
--
-- Zero is neither counter's: the stream_ordering counter's first value is
-- 1 and this one's is -1, and a window bound of zero keeps meaning
-- "unbounded at that end".
INSERT INTO roomserver_sequences (name, value) VALUES ('backfill_ordering', 0)
    ON CONFLICT (name) DO NOTHING;