QUERY PLAN
Sort (cost=23.07..23.08 rows=2 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
-> Nested Loop Left Join (cost=0.14..23.06 rows=2 width=39)
-> Seq Scan on tbl_task_group_head_of_relationships c (cost=0.00..6.62 rows=2 width=8)
Filter: (task_group_id = ANY ('{194,193}'::integer[]))
-> Index Scan using tbl_users_pkey on tbl_users u (cost=0.14..8.16 rows=1 width=35)
Index Cond: (id = c.user_id)