QUERY PLAN
Aggregate (cost=15869.39..15869.40 rows=1 width=8)
-> Sort (cost=15859.85..15861.44 rows=636 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=11067.92..15830.23 rows=636 width=248)
Hash Cond: (uc.comment_id = c.id)
Filter: ((uc.remind_user_id = 1000) OR (c.created_by = 1000))
-> Gather (cost=1000.00..4870.09 rows=618 width=9)
Workers Planned: 1
-> Parallel Seq Scan on tbl_unread_comments uc (cost=0.00..3808.29 rows=364 width=9)
Filter: (remind_user_id = 1000)
-> Hash (cost=6933.05..6933.05 rows=180310 width=16)
-> Seq Scan on tbl_comments c (cost=0.00..6933.05 rows=180310 width=16)
Filter: is_system