QUERY PLAN
Finalize Aggregate (cost=7667.78..7667.79 rows=1 width=8)
-> Gather (cost=7667.67..7667.78 rows=1 width=8)
Workers Planned: 1
-> Partial Aggregate (cost=6667.67..6667.68 rows=1 width=8)
-> Nested Loop (cost=0.42..6667.36 rows=126 width=0)
-> Parallel Seq Scan on tbl_unread_comments uc (cost=0.00..3033.33 rows=652 width=4)
Filter: ((NOT is_read) AND (remind_user_id = 1005))
-> Index Scan using tbl_comments_pkey on tbl_comments c (cost=0.42..5.57 rows=1 width=4)
Index Cond: (id = uc.comment_id)
Filter: (NOT is_system)