QUERY PLAN
Sort (cost=164.96..165.07 rows=44 width=44)
Sort Key: pinyin_shortcut, created_at DESC
-> Seq Scan on tbl_contacts (cost=0.00..163.76 rows=44 width=44)
Filter: (((name)::text ~~* '%i%'::text) OR (pinyin_shortcut ~~* '%i%'::text))