QUERY PLAN
Sort (cost=22.06..22.07 rows=4 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 Right Join (cost=4.46..22.02 rows=4 width=39)
Hash Cond: (u.id = c.user_id)
-> Seq Scan on tbl_users u (cost=0.00..16.44 rows=144 width=35)
-> Hash (cost=4.41..4.41 rows=4 width=8)
-> Seq Scan on tbl_task_group_head_of_relationships c (cost=0.00..4.41 rows=4 width=8)
Filter: (task_group_id = 106)