QUERY PLAN
Finalize GroupAggregate (cost=4320.52..4322.73 rows=19 width=10)
Group Key: object_type
-> Gather Merge (cost=4320.52..4322.47 rows=15 width=10)
Workers Planned: 1
-> Partial GroupAggregate (cost=3320.51..3320.77 rows=15 width=10)
Group Key: object_type
-> Sort (cost=3320.51..3320.54 rows=15 width=2)
Sort Key: object_type
-> Parallel Seq Scan on tbl_unread_comments (cost=0.00..3320.21 rows=15 width=2)
Filter: ((NOT is_read) AND (remind_user_id = 1000))