SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayAvg (children 1)
     ExpressionList (children 1)
      Function array (children 1)
       ExpressionList (children 2)
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'1.2\'
          Literal \'Decimal(60, 30)\'
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'3.45\'
          Literal \'Decimal(61, 29)\'
