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- Newsgroups: comp.databases.ingres
- Path: sparky!uunet!think.com!ames!purdue!yuma!daveb
- From: daveb@NREL.ColoState.EDU (Dave Bigelow 491-5574)
- Subject: Optimizer question
- Sender: news@yuma.ACNS.ColoState.EDU (News Account)
- Message-ID: <Dec28.232159.59717@yuma.ACNS.ColoState.EDU>
- Date: Mon, 28 Dec 1992 23:21:59 GMT
- Nntp-Posting-Host: panicum.nrel.colostate.edu
- Organization: Natural Resource Ecology Lab, Colo. State Univ.
- Lines: 20
-
- Using INGRES SunOS Version 6.4/02 (su4.u42/00) on a 670MP I get
- the following message when I try to do a count by on a data field
- (field_name). This also happens in Report_Writer when a conditional
- on the field is specified.
-
- 'the histogram for [field_name] is not monotonically increasing.'
-
- In poking around I discovered that the table was re-optimized but
- the second time without the inclusion of the offending field. My
- question is does the optimizer clear stale statistics each time it
- is invoked or do I have to do another modify to clear the
- statistics? Is this the likely cause of the problem?
-
- Thanks for your reply.
-
- --
- Dave Bigelow
- Natural Resource Ecology Laboratory internet: daveb@panicum.nrel.colostate.edu
- Colorado State University telephone: 303-491-5574
- Fort Collins, CO 80523 FAX: 303-491-1965
-