QUERY PLAN
Finalize GroupAggregate (cost=4789.04..4791.26 rows=20 width=11)
Group Key: object_type
-> Gather Merge (cost=4789.04..4790.99 rows=15 width=11)
Workers Planned: 1
-> Partial GroupAggregate (cost=3789.03..3789.29 rows=15 width=11)
Group Key: object_type
-> Sort (cost=3789.03..3789.07 rows=15 width=3)
Sort Key: object_type
-> Parallel Seq Scan on tbl_unread_comments (cost=0.00..3788.74 rows=15 width=3)
Filter: ((NOT is_read) AND (remind_user_id = 1000))