hive transform

hive transform python语法

select 
  transform( 
      sessionid,
      datajson,
      ods_day
  )
  using './pyenv.sh getVal.py' as 
  (   
      sessionid,
      datajson,
      ods_day
  )
  from douyonghou.table
  where ods_day = '20190612'
  limit 4;