QUERY PLAN
Finalize Aggregate (cost=6310.07..6310.08 rows=1 width=8)
-> Gather (cost=6309.96..6310.07 rows=1 width=8)
Workers Planned: 1
-> Partial Aggregate (cost=5309.96..5309.97 rows=1 width=8)
-> Nested Loop (cost=0.42..5309.84 rows=48 width=0)
-> Parallel Seq Scan on tbl_unread_comments uc (cost=0.00..3344.93 rows=282 width=4)
Filter: ((NOT is_read) AND (remind_user_id = 1011))
-> Index Scan using tbl_comments_pkey on tbl_comments c (cost=0.42..6.97 rows=1 width=4)
Index Cond: (id = uc.comment_id)
Filter: (NOT is_system)