QUERY PLAN
Group (cost=4812.72..4812.72 rows=2 width=4)
Group Key: remind_user_id
-> Sort (cost=4812.72..4812.72 rows=1 width=4)
Sort Key: remind_user_id
-> Gather (cost=4812.60..4812.71 rows=1 width=4)
Workers Planned: 1
-> Group (cost=3812.60..3812.61 rows=1 width=4)
Group Key: remind_user_id
-> Sort (cost=3812.60..3812.60 rows=1 width=4)
Sort Key: remind_user_id
-> Parallel Seq Scan on tbl_unread_comments (cost=0.00..3812.59 rows=1 width=4)
Filter: (comment_id = 220240)