Column in line to order by items problem

Hello
Version 10204.

I use function xmlagg in passes convert order lines.
SELECT *
from DBA_LOG_GROUP_COLUMNS
 WHERE table_name IN  ('NAP_CUST_USERS')
order by table_name   ,position ;

OWNER                          LOG_GROUP_NAME                 TABLE_NAME                     COLUMN_NAME                      POSITION LOGGING_PROPERTY
------------------------------ ------------------------------ ------------------------------ ------------------------------ ---------- ------------------
PSSYS                          GGS_14831759                   NAP_CUST_USERS                 SETID                                   1 LOG
PSSYS                          GGS_14831759                   NAP_CUST_USERS                 COMPANYID                               2 LOG
PSSYS                          GGS_14831759                   NAP_CUST_USERS                 USERNAME                                3 LOG
PSSYS                          GGS_14831759                   NAP_CUST_USERS                 NAP_CLOSE_DATE                          4 LOG
PSSYS                          GGS_14831759                   NAP_CUST_USERS                 PERSON_ID                               5 LOG
Here is how I use this:
SELECT table_name ,
rtrim (xmlagg (xmlelement (e, column_name || ',')).extract ('//text()'), ',') enames
from DBA_LOG_GROUP_COLUMNS e
 WHERE table_name IN  ('NAP_CUST_USERS')
group by table_name
order by table_name;

NAP_CUST_USERS     SETID,COMPANYID,NAP_CLOSE_DATE,USERNAME,PERSON_ID
As you can see the order of the column in the second statement is different than in the first.
I like to keep the position of the column, because they are in the first statement.
Please note that there are several tables in the where clause.
Just to keep the example simple as possible, I have mentioned only one table

Thank you

How about using the clause ORDER BY of XMLAGG?
http://docs.Oracle.com/CD/E11882_01/AppDev.112/e23094/xdb13gen.htm#ADXDB5084

SELECT table_name ,
RTRIM (XMLAGG (
  XMLELEMENT (E, COLUMN_NAME || ',')
  order by column_id
).EXTRACT ('//text()'), ',') ENAMES
FROM USER_TAB_COLS E
where table_name in ('EMP')
group by table_name

TABLE_NAME  ENAMES
----------- --------------------------------------------
EMP         EMPNO,ENAME,JOB,MGR,HIREDATE,SAL,COMM,DEPTNO

Published by: stew Ashton on February 10, 2013 21:18

Tags: Database

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