QUERY PLAN
Sort (cost=11.34..11.35 rows=2 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=3.23..11.33 rows=2 width=43)
Hash Cond: (u.id = c.user_id)
-> Seq Scan on tbl_users u (cost=0.00..7.39 rows=139 width=35)
-> Hash (cost=3.20..3.20 rows=2 width=12)
-> Seq Scan on tbl_task_group_head_of_relationships c (cost=0.00..3.20 rows=2 width=12)
Filter: (task_group_id = 187)