Improve rake elastic:projects_not_indexed query
What does this MR do and why?
This MR speeds up the SQL query from the gitlab:elastic:projects_not_indexed rake task (2.7s to 5ms).
Previous query:
SELECT "projects".* FROM "projects" WHERE "projects"."id" NOT IN (SELECT DISTINCT "index_statuses"."project_id" FROM "index_statuses") LIMIT 1000https://console.postgres.ai/gitlab/gitlab-production-tunnel-pg12/sessions/20449/commands/66933
New query:
SELECT "projects".* FROM "projects" LEFT JOIN index_statuses ON projects.id = index_statuses.project_id WHERE (index_statuses.project_id IS NULL) LIMIT 1000https://console.postgres.ai/gitlab/gitlab-production-tunnel-pg12/sessions/20449/commands/66932
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Edited by Dmitry Gruzd