QUERY PLAN
Sort (cost=247.58..251.53 rows=1578 width=44)
Sort Key: pinyin_shortcut, created_at DESC
-> Seq Scan on tbl_contacts (cost=0.00..163.76 rows=1578 width=44)
Filter: (((name)::text ~~* '%l%'::text) OR (pinyin_shortcut ~~* '%l%'::text))