QUERY PLAN
Sort (cost=13.22..13.22 rows=3 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 Right Join (cost=4.87..13.19 rows=3 width=43)
Hash Cond: (u.id = c.user_id)
-> Seq Scan on tbl_users u (cost=0.00..7.41 rows=141 width=35)
-> Hash (cost=4.83..4.83 rows=3 width=12)
-> Seq Scan on tbl_task_group_head_of_relationships c (cost=0.00..4.83 rows=3 width=12)
Filter: (task_group_id = ANY ('{3,12,4}'::integer[]))