SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function toTypeName (alias x) (children 1)
     ExpressionList (children 1)
      Function count (children 1)
       ExpressionList (children 1)
        Function in (children 1)
         ExpressionList (children 2)
          Function toNullable (children 1)
           ExpressionList (children 1)
            Literal \'a\'
          Function toNullable (children 1)
           ExpressionList (children 1)
            Literal \'a\'
