QUERY PLAN
Aggregate (cost=14620.60..14620.61 rows=1 width=8)
-> Sort (cost=14612.30..14613.69 rows=553 width=248)
Sort Key: (CASE WHEN ((c.created_by = 5064) OR uc.is_read) THEN true ELSE false END), c.created_at DESC
-> Hash Right Join (cost=10227.80..14587.11 rows=553 width=248)
Hash Cond: (uc.comment_id = c.id)
Filter: ((uc.remind_user_id = 5064) OR (c.created_by = 5064))
-> Gather (cost=1000.00..4553.56 rows=523 width=9)
Workers Planned: 1
-> Parallel Seq Scan on tbl_unread_comments uc (cost=0.00..3501.26 rows=308 width=9)
Filter: (remind_user_id = 5064)
-> Hash (cost=6392.31..6392.31 rows=163079 width=16)
-> Seq Scan on tbl_comments c (cost=0.00..6392.31 rows=163079 width=16)
Filter: is_system