func doRead(_data)
  fvar(qr)
  qr = Query
  
  if(expof(qr) != QSqlQuery)
    error('Query is invalid!')
    return()
  end
  
  fvar(s)
  s = (qr + '.value(') && Index && (').to' + code(Type) + '()')
  //Int,String,Double,Time,DateTime
  switch(Type)
    case "Int":
      sub(s, 1)
    case "String":
      sub(s, 2)
    case "Double":
      sub(s, 7)
    case "Time":
      sub(s, QTime)
    case "DateTime":
      sub(s, QDateTime)    
  end
  event(onRead, s)
end