SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function s3 (children 1)
       ExpressionList (children 2)
        Identifier s3_conn
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier filename
          Function concat (children 1)
           ExpressionList (children 2)
            Function currentDatabase (children 1)
             ExpressionList
            Literal \'/1/test.parquet\'
