Metalink has a note that the INLIST ITERATOR may cause problems on certain platforms.
That's about as much detail as it offers.
I don't know the internal workings of II, but I suspect there is some sort of merging
occuring after each (or all) iterations. Perhaps someone on the list can explain how
an Inlist Iterator works...
"Vergara, Michael (TEM)" wrote:
>
> Ok you guys...
>
> Here's the latest on the 'real' subject of this thread.
> You know what an explain plan looks like, right? On our
> production DB, it looked like
>
> SELECT STATEMENT CHOOSE
> SORT GROUP BY
> TABLE ACCESS BY INDEX ROWID
> INDEX RANGE SCAN
>
> Ok...so far so what, right? Well, on our stage server, it looked
> like this...
> 32 SELECT STATEMENT CHOOSE
> 31 SORT GROUP BY
> 30 CONCATENATION
> 3 INLIST ITERATOR
> 2 TABLE ACCESS BY INDEX ROWID
> 1 INDEX RANGE SCAN
> 5 TABLE ACCESS BY INDEX ROWID
> 4 INDEX RANGE SCAN
> 7 TABLE ACCESS BY INDEX ROWID
> 6 INDEX RANGE SCAN
> 9 TABLE ACCESS BY INDEX ROWID
> 8 INDEX RANGE SCAN
> ...
> 29 TABLE ACCESS BY INDEX ROWID
> 28 INDEX RANGE SCAN
>
> In each case of Table Access...Index Range Scan, the WHERE clauses
> were the same. I had never seen anything like this. Have you?
> And these plans are for the same SQL.
>
> However...this was an artifact, not the problem. We found the
> problem. It was an Oracle Patch. Yep. If you have Oracle
> 9.2.0.3, take my advice and DO NOT INSTALL MERGE FIX 2871468.
>
> I accidentally missed installing this patch on the STG server, and
> the report in question worked there. In PRD, there was no joy.
> When I applied the patch to STG, it failed there, and worked again
> when the patch was removed. (There's a vote for 'opatch'!).
>
> So...my problem is resolved, the problem was an Oracle patch.
> Thanks to all for your help and suggestions.
>
> Cheers,
> Mike
>
> -----Original Message-----
> Sent: Tuesday, July 22, 2003 12:54 PM
> To: Multiple recipients of list ORACLE-L
>
> Color may be irrelevant, depending on amount.
>
> --
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> --
> Author: Vergara, Michael (TEM)
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