Re: Update

Thanks Alexander,
MERGE should do the trick. It is 9i, so I'll have to supply fake not
matched clause.
Much appreciated.

Ranko.

On 3/12/07, Alexander Fatkulin <afatkulin@xxxxxxxxx> wrote:

Ranko,

since you are almost certainly going ahead to ORA-01779 with such kind
of query if you write it as a single "update (select ...) set ..."
(Oracle doesn't like when you join tables with supplied
variables/literals even if that leads to a fully key-preserved join).

I would try to use merge instead. Something like this (I've just typed
it in, can't verify):

merge into sub_svc_parm ssp
       using (
               SELECT b.sub_svc_id, d.destination_group_id val
                       FROM sub_svc a, sub_svc b, sub_svc_parm c, 
RATE_CENTRE_TEMP_&1 d
                       WHERE a.SUB_ID = b.SUB_ID
                               AND a.SVC_ID = 10000
                               AND b.SVC_ID = 10008
                               AND a.SUB_SVC_ID = c.SUB_SVC_ID
                               AND c.parm_id = 10230
                               AND SUBSTR(c.val,1,6) = d.npanxx) v
       on (ssp.sub_svc_id=v.sub_svc_id and ssp.parm_id = 12650)
       when matched then update set ssp.val=v.val;

btw - what version? I assume you're on 10g so you don't need both
matched/not matched sections.

On 3/13/07, Ranko Mosic <ranko.mosic@xxxxxxxxx> wrote:
> Hi List,
> I need to update large table sub_svc_parm ( over billion rows).  This
> is PL/SQL block that does it:
> I want to rewrite so it is executed  as single SQL update statement.
> Any suggestions ?

--
Alexander Fatkulin




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Regards,
Ranko Mosic
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Phone: 416-450-2785
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