QUERY PLAN
Aggregate (cost=12252.19..12252.20 rows=1 width=8)
-> Sort (cost=12250.36..12250.66 rows=122 width=248)
Sort Key: (CASE WHEN ((c.created_by = 1000) OR uc.is_read) THEN true ELSE false END), c.created_at DESC
-> Hash Right Join (cost=8369.81..12246.13 rows=122 width=248)
Hash Cond: (uc.comment_id = c.id)
Filter: ((uc.remind_user_id = 1000) OR (c.created_by = 1000))
-> Gather (cost=1000.00..4874.39 rows=618 width=9)
Workers Planned: 1
-> Parallel Seq Scan on tbl_unread_comments uc (cost=0.00..3812.59 rows=364 width=9)
Filter: (remind_user_id = 1000)
-> Hash (cost=6935.95..6935.95 rows=34709 width=16)
-> Seq Scan on tbl_comments c (cost=0.00..6935.95 rows=34709 width=16)
Filter: (NOT is_system)