QUERY PLAN
GroupAggregate (cost=4710.53..4714.25 rows=1 width=12)
Group Key: uc.object_id
-> Nested Loop (cost=4710.53..4714.24 rows=1 width=4)
-> Gather Merge (cost=4710.25..4710.55 rows=1 width=8)
Workers Planned: 1
-> Merge Join (cost=3710.24..3710.43 rows=1 width=8)
Merge Cond: (uc.object_id = rccr.approve_id)
-> Sort (cost=3599.19..3599.38 rows=76 width=4)
Sort Key: uc.object_id
-> Parallel Seq Scan on tbl_unread_comments uc (cost=0.00..3596.81 rows=76 width=4)
Filter: ((NOT is_read) AND ((object_type)::text = '37'::text) AND (remind_user_id = 1001))
-> Sort (cost=111.06..111.08 rows=9 width=4)
Sort Key: rccr.approve_id
-> Seq Scan on tbl_approve_carbon_copy_rels rccr (cost=0.00..110.91 rows=9 width=4)
Filter: (user_id = 1001)
-> Index Scan using tbl_approves_pkey on tbl_approves r (cost=0.28..3.68 rows=1 width=4)
Index Cond: (id = uc.object_id)
Filter: (status <> 0)