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Author SHA1 Message Date
Sean Quah b2c2b03079
Fix PostgreSQL sometimes using table scans for `event_search` (#14409) 
PostgreSQL may underestimate the number of distinct `room_id`s in
`event_search`, which can cause it to use table scans for queries for
multiple rooms.

Fix this by setting `n_distinct` on the column.

Resolves #14402.

Signed-off-by: Sean Quah <seanq@matrix.org>
 2022-11-10 19:02:27 +00:00