Ferenc Mantfeld wrote: > > Hi All > > I have a very large data set for a DW and I created a materialized view on > it to give me a quick access to group by and summarization results, I want > some way to be able to update the MV with just the delta after I perform an > incremental load to the base fact or dimension tables on which the MV is > built. From what I have played with so far, I don't see a ready solution. > Fast refreshes don't work when MV is on complex view. We are talking about > dimension tables with possibly close to a billion rows, and fact tables of > similar proportions, so the time taken to refresh the MV becomes a factor. > > Any useful suggestions, write-up's, white papers in this regard would be > extremely helpful and welcome. Ta muchly in advance ! > > Regards: > Ferenc Mantfeld > Senior Performance Engineer > Siebel Performance Engineering > Melbourne, 3000, VIC, Australia >
Ferenc, This has just crossed my mind and perhaps that after I think harder I'll find it a foolish idea, but would it be possible to have snapshot logs (or their home-made equivalents) on all the tables in the view and building a 'delta view' on top of those logs ? -- Regards, Stephane Faroult Oriole Software -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Stephane Faroult INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
