SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Function sumCount (children 1)
       ExpressionList (children 1)
        Identifier v
    Function sumCount (children 1)
     ExpressionList (children 1)
      Identifier v
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Function CAST (alias v) (children 1)
            ExpressionList (children 2)
             Literal \'a\'
             Literal \'String\'