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Home -> Community -> Usenet -> c.d.o.server -> Re: Hint /*+NESTED_TABLE_SET_REFS+*/
Wind-up comments aside -
At present it is hard to say if you 'need to know'. There are numerous unpublished hints, and some of them may be useful: for example PUSH_SUBQ was available several upgrade releases before it was documented.
In this case, I wonder if this is a hint which tells Oracle to use some subtle code that allows REF columns to be re-valued on import so that they point to the things they pointed to at export time. (I think REF columns are generated by SYS_GUID, so would need to become invalid if imported to another database).
If so, this might be a cute trick for resolving, or clearing, dangling refs. (Yet another exercise left to the reader.)
--
Jonathan Lewis
Yet another Oracle-related web site: http://www.jlcomp.demon.co.uk
Connor McDonald wrote in message <38103FF0.1EAE_at_yahoo.com>...
>
>which of course leads to me my next questions...
>
>How do find what they do ?
>Do I need to know ?
>Why does it appear during imports ?
>
>
>--
>===========================================
>Connor McDonald
>"These views mine, no-one elses etc etc"
>connor_mcdonald_at_yahoo.com
>
>"Some days you're the pigeon, and some days you're the statue."
Received on Fri Oct 22 1999 - 14:40:04 CDT