QUERY PLAN
Sort (cost=27.73..27.78 rows=22 width=43)
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..27.24 rows=22 width=43)
Hash Cond: (c.user_id = u.id)
-> Seq Scan on tbl_task_group_head_of_relationships c (cost=0.00..8.94 rows=22 width=12)
Filter: (task_group_id = ANY ('{192,196,198,199,106,178,203}'::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)