Re: Jul2015 Release Candidate

Hi, I didn`t tried the RC, but will it be able to just copy/paste generated MAL-Code and execute it, when it releases? Kind regards, Martin

Am 14.08.2015 um 11:46 schrieb Niels Nes :

On Thu, Aug 13, 2015 at 09:33:41AM +0200, Sjoerd Mullender wrote:

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https://www.monetdb.org/downloads/testing/relnotes.html

On 12/08/15 19:54, Richard Hughes wrote:

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On Mon, 10 Aug 2015 15:25:52 +0200, Sjoerd Mullender wrote:

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I have created a release candidate for the Jul2015 release. The candidate is available at http://dev.monetdb.org/downloads/testing/. If all goes well, this candidate will morph into a release sometime soon(ish). In the mean time, you can use this release candidate and test to see whether it works. And if it doesn't work, I would really like to hear about it.

Do you have a preliminary list of new features in this release? I'm not going to test features that I don't know exist...

I've had my eye on the 'merge tables' work. The documentation at https://www.monetdb.org/Documentation/Cookbooks/SQLrecipes/DataPartiti oning

is clear on the usage of the feature, but can somebody knowledgeable

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comment on the advantages/disadvantages relative to the existing approach of using a view of unions? Basically I want to know whether it's worth rewriting my well-tested existing code to make use of the new facility. Richard

I'd expect your application specific solution to always out perform a more general solution. But afcourse we are interested in more testing/comparisons, so if you have some time please try also with the new merge table support (possibly also with remote and replica tables).

The merge tables are indeed just a union all kind of view, with the difference that we know the parts and therefor can more easily apply relational rewrites over the parts. For now these are limited too 'readonly' marked partitions. These partitions could be eliminated in the rewrite and could greatly reduce the size of the mal plans. We use statistics on those readonly parts (obtained via analyze) to do the rewrites.

Niels

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Thanks,

Richard. _______________________________________________ users-list mailing list users-list@monetdb.org https://www.monetdb.org/mailman/listinfo/users-list

-- Sjoerd Mullender _______________________________________________ users-list mailing list users-list@monetdb.org https://www.monetdb.org/mailman/listinfo/users-list

-- Niels Nes, Manager ITF, Centrum Wiskunde & Informatica (CWI) Science Park 123, 1098 XG Amsterdam, The Netherlands room L3.14, phone ++31 20 592-4098 sip:4098@sip.cwi.nl url: https://www.cwi.nl/people/niels e-mail: Niels.Nes@cwi.nl _______________________________________________ users-list mailing list users-list@monetdb.org https://www.monetdb.org/mailman/listinfo/users-list