QUERY PLAN
Sort (cost=198.70..200.53 rows=734 width=44)
Sort Key: pinyin_shortcut, created_at DESC
-> Seq Scan on tbl_contacts (cost=0.00..163.76 rows=734 width=44)
Filter: (((name)::text ~~* '%h%'::text) OR (pinyin_shortcut ~~* '%h%'::text))