SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Identifier a
    Identifier b.a
    Identifier b.b
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function s3 (children 1)
       ExpressionList (children 3)
        Identifier s3_conn
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier filename
          Literal \'test_02245_s3_nested_arrow1_*\'
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier format
          Literal \'Arrow\'
