SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Identifier res
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 2)
           Identifier col1
           Function assumeNotNull (alias res) (children 1)
            ExpressionList (children 1)
             Identifier col1
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier test1_00395
   Function isNotNull (children 1)
    ExpressionList (children 1)
     Identifier col1
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier res