QUERY PLAN
Group (cost=17197.68..17198.60 rows=122 width=18)
Group Key: c.object_type, sub.unreadcount
-> Sort (cost=17197.68..17197.99 rows=122 width=10)
Sort Key: c.object_type, sub.unreadcount
-> Hash Left Join (cost=13327.94..17193.45 rows=122 width=10)
Hash Cond: ((c.object_type)::text = (sub.object_type)::text)
-> Hash Right Join (cost=8365.19..12230.36 rows=122 width=2)
Hash Cond: (uc.comment_id = c.id)
Filter: ((uc.remind_user_id = 5064) OR (c.created_by = 5064))
-> Gather (cost=1000.00..4863.55 rows=617 width=8)
Workers Planned: 1
-> Parallel Seq Scan on tbl_unread_comments uc (cost=0.00..3801.85 rows=363 width=8)
Filter: (remind_user_id = 5064)
-> Hash (cost=6931.60..6931.60 rows=34687 width=10)
-> Seq Scan on tbl_comments c (cost=0.00..6931.60 rows=34687 width=10)
Filter: (NOT is_system)
-> Hash (cost=4962.69..4962.69 rows=5 width=11)
-> Subquery Scan on sub (cost=4962.57..4962.69 rows=5 width=11)
-> Finalize GroupAggregate (cost=4962.57..4962.64 rows=5 width=11)
Group Key: uc_1.object_type
-> Sort (cost=4962.57..4962.57 rows=3 width=11)
Sort Key: uc_1.object_type
-> Gather (cost=4962.19..4962.54 rows=3 width=11)
Workers Planned: 1
-> Partial GroupAggregate (cost=3962.19..3962.24 rows=3 width=11)
Group Key: uc_1.object_type
-> Sort (cost=3962.19..3962.20 rows=3 width=3)
Sort Key: uc_1.object_type
-> Nested Loop (cost=0.42..3962.17 rows=3 width=3)
-> Parallel Seq Scan on tbl_unread_comments uc_1 (cost=0.00..3801.85 rows=19 width=7)
Filter: ((NOT is_read) AND (remind_user_id = 5064))
-> Index Scan using tbl_comments_pkey on tbl_comments c_1 (cost=0.42..8.44 rows=1 width=4)
Index Cond: (id = uc_1.comment_id)
Filter: (NOT is_system)