QUERY PLAN
Group (cost=17222.34..17223.26 rows=122 width=18)
Group Key: c.object_type, sub.unreadcount
-> Sort (cost=17222.34..17222.65 rows=122 width=10)
Sort Key: c.object_type, sub.unreadcount
-> Hash Left Join (cost=13341.76..17218.11 rows=122 width=10)
Hash Cond: ((c.object_type)::text = (sub.object_type)::text)
-> Hash Right Join (cost=8368.27..12244.29 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..4874.39 rows=618 width=8)
Workers Planned: 1
-> Parallel Seq Scan on tbl_unread_comments uc (cost=0.00..3812.59 rows=364 width=8)
Filter: (remind_user_id = 5064)
-> Hash (cost=6934.50..6934.50 rows=34702 width=10)
-> Seq Scan on tbl_comments c (cost=0.00..6934.50 rows=34702 width=10)
Filter: (NOT is_system)
-> Hash (cost=4973.42..4973.42 rows=5 width=11)
-> Subquery Scan on sub (cost=4973.30..4973.42 rows=5 width=11)
-> Finalize GroupAggregate (cost=4973.30..4973.37 rows=5 width=11)
Group Key: uc_1.object_type
-> Sort (cost=4973.30..4973.31 rows=3 width=11)
Sort Key: uc_1.object_type
-> Gather (cost=4972.92..4973.28 rows=3 width=11)
Workers Planned: 1
-> Partial GroupAggregate (cost=3972.92..3972.98 rows=3 width=11)
Group Key: uc_1.object_type
-> Sort (cost=3972.92..3972.93 rows=3 width=3)
Sort Key: uc_1.object_type
-> Nested Loop (cost=0.42..3972.90 rows=3 width=3)
-> Parallel Seq Scan on tbl_unread_comments uc_1 (cost=0.00..3812.59 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)