Dropping a column in composite xmltype table with virtual column

Question

Hello,
i found some interesting behavior. I have a table with xmltype column and a virtual column. If i drop a column, which has an index smaller than the index for the xmltype column, than the virtual column reference for xmltype column is not changed.
select * from v$version;
drop table t_xml purge;
create table t_xml( c1 number,
                    c2 number,
                    cxml xmltype,
                    c3 number,
                    xmlflag number as (nvl2(cxml,1,0)));
select * from t_xml;
alter table t_xml drop column c2;                    
select * from t_xml; The 2nd select will result in error:
SQL> select * from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0      Production
TNS for IBM/AIX RISC System/6000: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
SQL> alter table t_xml drop column c2;                    
Tabelle wurde geändert.
SQL>
SQL> select * from t_xml;
select * from t_xml
FEHLER in Zeile 1:
ORA-00904: "SYS_NC00004$": ungültiger BezeichnerNow the virtual column xmlflag references still the old hidden column for cxml (SYS_NC00004$). It not references the new hidden column, which is now SYS_NC00003$.
I think, it is a bug! Can someone inform oracle? I have no access to metalink.

Answer 1

Hi,
Please try this code:
loop at int_inv into wa_inv.
    lv_count = lv_count + 1.
    AT END OF posnr.   <------- The field you want to sum..
      gs_total-posnr      = wa_inv-posnr.
      gs_total-cov_total  = lv_count.
      APPEND gs_total TO gt_total.
      CLEAR : gs_total,
              lv_count,
              wa_inv.
    ENDAT.
  ENDLOOP.