[MarkLogic Dev General] Is fn:doc-available() high performance, or should we use something else like cts:uri-match()?
We have a system with a million or so records. When attempting to discern if a doc with a given uri is in the system, what's the fastest method? Thanks. ___ General mailing list General@developer.marklogic.com http://developer.marklogic.com/mailman/listinfo/general
Re: [MarkLogic Dev General] Is fn:doc-available() high performance, or should we use something else like cts:uri-match()?
xdmp:exists(fn:doc(/my/uri.xml)) will be fast. The uri lexicon functions are also a good choice. -Danny From: general-boun...@developer.marklogic.com [mailto:general-boun...@developer.marklogic.com] On Behalf Of David Swearingen Sent: Thursday, March 01, 2012 1:15 PM To: general@developer.marklogic.com Subject: [MarkLogic Dev General] Is fn:doc-available() high performance, or should we use something else like cts:uri-match()? We have a system with a million or so records. When attempting to discern if a doc with a given uri is in the system, what's the fastest method? Thanks. ___ General mailing list General@developer.marklogic.com http://developer.marklogic.com/mailman/listinfo/general
Re: [MarkLogic Dev General] Is fn:doc-available() high performance, or should we use something else like cts:uri-match()?
It looks to me like doc-available($uri) is equivalent to xdmp:exists(doc($uri)) now. Either expression results in a simple list-cache lookup, with no tree fetches and no reliable difference in elapsed-time. If you use a uri lexicon, probably something like exists(cts:uris($uri, 'limit=1')) will be faster than cts:uri-match($uri). But I think there might be cases where doc-available is cached and the lexicon lookup is not, so the lexicon lookup may not always be faster than doc-available. -- Mike On 1 Mar 2012, at 13:25 , Danny Sokolsky wrote: xdmp:exists(fn:doc(/my/uri.xml)) will be fast. The uri lexicon functions are also a good choice. -Danny From: general-boun...@developer.marklogic.com [mailto:general-boun...@developer.marklogic.com] On Behalf OfDavid Swearingen Sent: Thursday, March 01, 2012 1:15 PM To: general@developer.marklogic.com Subject: [MarkLogic Dev General] Is fn:doc-available() high performance, or should we use something else like cts:uri-match()? We have a system with a million or so records. When attempting to discern if a doc with a given uri is in the system, what's the fastest method? Thanks. ___ General mailing list General@developer.marklogic.com http://developer.marklogic.com/mailman/listinfo/general ___ General mailing list General@developer.marklogic.com http://developer.marklogic.com/mailman/listinfo/general
Re: [MarkLogic Dev General] Is fn:doc-available() high performance, or should we use something else like cts:uri-match()?
I think one advantage xdmp:exists has is that you can put any searchable XPath xpression in there. So if you wanted it to return true only if a document had a particular element, for example, then you can do something like this: xdmp:exists(fn:doc(/my/uri.xml)/foo) So it depends if all you want to do is to see if the document exists or if you want to do more. -Danny -Original Message- From: general-boun...@developer.marklogic.com [mailto:general-boun...@developer.marklogic.com] On Behalf Of Michael Blakeley Sent: Thursday, March 01, 2012 1:31 PM To: MarkLogic Developer Discussion Subject: Re: [MarkLogic Dev General] Is fn:doc-available() high performance, or should we use something else like cts:uri-match()? It looks to me like doc-available($uri) is equivalent to xdmp:exists(doc($uri)) now. Either expression results in a simple list-cache lookup, with no tree fetches and no reliable difference in elapsed-time. If you use a uri lexicon, probably something like exists(cts:uris($uri, 'limit=1')) will be faster than cts:uri-match($uri). But I think there might be cases where doc-available is cached and the lexicon lookup is not, so the lexicon lookup may not always be faster than doc-available. -- Mike On 1 Mar 2012, at 13:25 , Danny Sokolsky wrote: xdmp:exists(fn:doc(/my/uri.xml)) will be fast. The uri lexicon functions are also a good choice. -Danny From: general-boun...@developer.marklogic.com [mailto:general-boun...@developer.marklogic.com] On Behalf OfDavid Swearingen Sent: Thursday, March 01, 2012 1:15 PM To: general@developer.marklogic.com Subject: [MarkLogic Dev General] Is fn:doc-available() high performance, or should we use something else like cts:uri-match()? We have a system with a million or so records. When attempting to discern if a doc with a given uri is in the system, what's the fastest method? Thanks. ___ General mailing list General@developer.marklogic.com http://developer.marklogic.com/mailman/listinfo/general ___ General mailing list General@developer.marklogic.com http://developer.marklogic.com/mailman/listinfo/general ___ General mailing list General@developer.marklogic.com http://developer.marklogic.com/mailman/listinfo/general
