RE: workaround for odciaggregate bug?

  • From: "Herring Dave - dherri" <Dave.Herring@xxxxxxxxxx>
  • To: <rstauffer@xxxxxxxxxxxxxxxxxxxx>, "Stephane Faroult" <sfaroult@xxxxxxxxxxxx>
  • Date: Wed, 28 Jan 2009 08:38:09 -0600

If I'm understanding this question correctly, and that's a big IF, I've
done a hack for this that may help.  I "adjusted" the type body code to
allow a prefix surrounded by a special delimited, in my case "~".
Anything inside that is used to help sort rows before aggregating them
into a list, then the delimiters are removed.

Any example call would be: <function name>('~' || TO_CHAR(<numeric col
for sorting>, '999') || '~' || <column/value for aggregated string>).

Here's what I added to the type:

FOR r IN (SELECT column_value FROM table (self.vals) ORDER BY 1) LOOP
    * It is assumed that any additional value used to sort the columns
is surrounded
    * by '~', so strip them off before returning the string.
    result := result ||
SUBSTR(r.column_value,1,INSTR(r.column_value,'~',1,1)-1) || 
RETURN ODCIConst.Success;

Hope that makes sense.  

David C. Herring  | DBA, Acxiom Automotive
630-944-4762 office | 630-430-5988 cell | 630-944-4989 fax
1501 Opus Pl | Downers Grove, IL, 60515 | U.S.A. |

-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Stauffer, Robert G
Sent: Tuesday, January 27, 2009 1:27 PM
To: Stephane Faroult
Cc: oracle-l@xxxxxxxxxxxxx
Subject: RE: workaround for odciaggregate bug?


Thanks.  Your query does the trick.

And, true, it doesn't make sense to expect the row ordering to work -
especially since ODCIAggregate seems to have been targeted at numeric

Thanks to Ian, Mark, and Charles for your help, too.

Bob Stauffer
D&E Communications
Ephrata, PA
-----Original Message-----
From: Stephane Faroult [mailto:sfaroult@xxxxxxxxxxxx] 
Sent: Friday, January 23, 2009 17:26
To: Stauffer, Robert G
Cc: oracle-l@xxxxxxxxxxxxx
Subject: Re: workaround for odciaggregate bug?


    I'm not sure it really qualifies as a bug, because row ordering is
something that has no meaning in the relational theory, and therefore
Oracle is free to return rows in whichever order it wants - only the
final "order by" counts.
But there is another solution than stringAgg, and this one works "by

SQL> select acctnbr,
  2          replace(path, '|', '') result
  3  from (select acctnbr,
  4            sys_connect_by_path(prodcount, '|') path,
  5            rn,
  6            cnt
  7         from (select acctnbr,
  8              prodcount,
  9              row_number() over (partition by acctnbr
 10                         order by snapshotdate) rn,
 11              count(snapshotdate) over (partition by acctnbr) cnt
 12           from testtable)
 13         connect by acctnbr = prior acctnbr
 14            and rn = 1 + prior rn
 15         start with rn = 1)
 16  where rn = cnt
 17  order by acctnbr
 18  /

---------- --------------------
0123456789 010203


S. Faroult

Stauffer, Robert G wrote:
> All,
> and on AIX 5.2
> I'm trying to use ODCIAggregate and Tom Kyte's stringAgg function to
> concatenate a number in multiple rows into a string.  Below is the
> output of the select statements I ran.  Create scripts for the table,
> type, and function are below the output.  I'm expecting the returned
> string to be '010203' but it returns '010032'.  Unfortunately, it
> like there's a bug (7194959 to be fixed in 11.2) in ODCIAggregate that
> "unsorts" the sorted data when it creates the concatenated string.
> looked around (asktom, metalink, etc.) and can't seem to find a
> work-around for this method.  Has anyone come up with one?

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