QUERY PLAN
Limit (cost=13007.34..13019.01 rows=100 width=158)
-> Gather Merge (cost=13007.34..13019.24 rows=102 width=158)
Workers Planned: 2
-> Sort (cost=12007.32..12007.45 rows=51 width=158)
Sort Key: (CASE WHEN ((c.created_by = 1000) OR uc.is_read) THEN true ELSE false END), c.created_at DESC
-> Merge Left Join (cost=11929.76..12005.87 rows=51 width=158)
Merge Cond: (c.id = uc.comment_id)
Filter: ((uc.remind_user_id = 1000) OR (c.created_by = 1000))
-> Sort (cost=6677.72..6713.86 rows=14456 width=153)
Sort Key: c.id
-> Parallel Seq Scan on tbl_comments c (cost=0.00..5678.85 rows=14456 width=153)
Filter: (NOT is_system)
-> Sort (cost=5252.05..5253.59 rows=617 width=9)
Sort Key: uc.comment_id
-> Seq Scan on tbl_unread_comments uc (cost=0.00..5223.45 rows=617 width=9)
Filter: (remind_user_id = 1000)