QUERY PLAN
Sort (cost=21.60..21.96 rows=144 width=35)
Sort Key: pinyin1 NULLS FIRST, namecut1 NULLS FIRST, pinyin2 NULLS FIRST, namecut2 NULLS FIRST, pinyin3 NULLS FIRST, namecut3 NULLS FIRST, pinyin4 NULLS FIRST, namecut4 NULLS FIRST
-> Seq Scan on tbl_users u (cost=0.00..16.44 rows=144 width=35)