title: Postgresql json_each equivalent in Presto
body: <p>I have data which I used to extract from Postgresql using json_each(x), I am looking for an equivalent of json_each in Presto after a database migration to extract my data into multiple rows. The original format is as such 
  {"0":100.0,"57000":75.0,"47000":80.0}</p>
  
  <p>Expected Output to separate key and values into 2 columns of multiple rows</p>
  
  <p>Any idea?</p>