Indexes · drill
Without touching the table
Return the actor_id of every event for actor 200 — that column and nothing else, ordered by actor_id. The index already carries everything you need, so the table should never be read.
Your query
⌘⏎
Return the actor_id of every event for actor 200 — that column and nothing else, ordered by actor_id. The index already carries everything you need, so the table should never be read.