QUERY PLAN
Sort (cost=28.00..28.04 rows=16 width=39)
Sort Key: u.pinyin1 NULLS FIRST, u.namecut1 NULLS FIRST, u.pinyin2 NULLS FIRST, u.namecut2 NULLS FIRST, u.pinyin3 NULLS FIRST, u.namecut3 NULLS FIRST, u.pinyin4 NULLS FIRST, u.namecut4 NULLS FIRST
-> Hash Left Join (cost=18.24..27.68 rows=16 width=39)
Hash Cond: (c.user_id = u.id)
-> Seq Scan on tbl_task_group_head_of_relationships c (cost=0.00..9.40 rows=16 width=8)
Filter: (task_group_id = ANY ('{207,206,205,203,201,189,188,187}'::integer[]))
-> Hash (cost=16.44..16.44 rows=144 width=35)
-> Seq Scan on tbl_users u (cost=0.00..16.44 rows=144 width=35)