-- Composite feed index with an id tiebreaker so keyset pagination
-- (ORDER BY created_at DESC, id DESC) stays index-covered and stable when
-- multiple uploads share a created_at timestamp.
CREATE INDEX idx_upload_event_created_id
    ON upload(event_id, created_at DESC, id DESC)
    WHERE deleted_at IS NULL;

-- A user's own comments (moderation, "who commented"). The sibling
-- idx_upload_user already exists for uploads; comment(user_id) was missing.
CREATE INDEX idx_comment_user
    ON comment(user_id)
    WHERE deleted_at IS NULL;

-- Hashtag filtering over comments — mirrors idx_upload_hashtag_hashtag, which
-- only covered upload_hashtag.
CREATE INDEX idx_comment_hashtag_hashtag
    ON comment_hashtag(hashtag_id);