coalesce(s.position, 0) > 5 and coalesce(s.flagged, false) hid from Postgres that a match needs
a row of entry_state, so it kept the outer join and scanned every item: Currently Listening read
all 574,000 (74,733 blocks from disk), 970 ms of its 1.3 s. s.position > 5 and s.flagged mean the
same, a missing row being neither, and let it start from the person's own rows: 2.2 ms, and
Pinned 32 ms to 2.3 (EXPLAIN ANALYZE, BUFFERS on production, read only). Unread keeps its
coalesce: no row is unread.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
rays
6fde4b73cd