Hi all.

I'm having problems with the following query:

select a1.MBR_TYP_CDE MBR_TYP_CDE,
 (COUNT ( DISTINCT a1.NOVS_NTWRK_MBR_KYD ))   
 from MDSS_STAR.NOVUS_NETWRK_MBR_D a1
group by a1.MBR_TYP_CDE

It fails with ora-06000 (parameter 15851). I have
noticed that if I created the new table
NOVUS_NETWRK_MBR_D_tmp as select * from
NOVUS_NETWRK_MBR_D the query runs with no issues. 

I have compared the explain plans for the two queries
and here what i saw. This is the plan for the query
that runs OK
0-0-9721 1.9721 SELECT STATEMENT    SQL1 Cost = 9721
1-0-1  2.1 SORT GROUP BY
2-1-1   3.1 TABLE ACCESS FULL NOVUS_NETWRK_MBR_D_TMP

This is the plan for the query that fails.
0-0-5898 1.5898 SELECT STATEMENT    SQL1 Cost = 5898
1-0-1  2.1 SORT GROUP BY
2-1-1   3.1 SORT GROUP BY
3-2-1    4.1 SORT GROUP BY
4-3-1     5.1 TABLE ACCESS FULL NOVUS_NETWRK_MBR_D

I can't understand why would oracle do three sorts on
that query. May be this is somehow related to my
ora-0600. If someone has any ideas as to what can be
going on here I would really appreciate it. We are
running oracle 817 in ops on 4.3.3 IBM SP/2

thanks in advance

Gene

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