Re: Indexed file (RMS) IRC$V_RRV question
- From: Bill Todd <billtodd@xxxxxxxxxxxxx>
- Date: Fri, 25 May 2007 02:51:15 -0400
JF Mezei wrote:
Bill Todd wrote:No, since the RRV has nothing to do with finding the next bucket: its purpose is to find a record that originated in the bucket but has since moved elsewhere (and there's one for each such record).
Under what circumstances would an RRV record in a data bucket not point to the same bucket as the bkt$l_nxtbkt in that bucket's header ?
When the record it points to is not in the next bucket in primary key sequence. You yourself gave an example of such a case with your 'ZZZZ' record.
OK, thinking about it:
Would it be correct to state that the RRV record is like a QBUS grant-continuity card that tells RMS to continue searching in the next bucket for records with the same rrv_vbn ?
No: it is a direct pointer to the original record in whatever bucket now contains it, wherever that bucket may be.
- bill
.
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