Re: [MarkLogic Dev General] Performance of cts:element-values

Tue, 12 May 2015 06:10:44 -0700

Hi Andreas,

cts:element-values() get result for one or more elements together with its internal search mechanism.If you run cts:element-values(xs:QName("a")) and cts:element-values(xs:QName("b")) separately, it will return result also fast but when you are manually merging the values after getting result at your end this step will take some time to perform. 
 
 
Also refer https://developer.marklogic.com/pubs/architecture/inside-marklogic-server-r7.pdf for how MarkLogic works internally for searching and other stuff  :)


Regards,
Asit Nautiyal

From: [email protected] [[email protected]] on behalf of Andreas Hubmer [[email protected]]
Sent: Tuesday, May 12, 2015 6:23 PM
To: MarkLogic Developer Discussion
Subject: Re: [MarkLogic Dev General] Performance of cts:element-values

Thanks for your reply. Can you give some insight on how cts:element-values works internally when called with multiple QNames? How is it faster than manually merging the values afterwards?

2015-05-12 14:50 GMT+02:00 Asitmohan Nautiyal <[email protected]>:
Hi Andreas,

 cts:element-values((xs:QName("a"), xs:QName("b"))) will be good in terms of performance rather than getting result separate and then manually merging. 

You can write a dynamic query based on your element and element+attribute and then use to retrieve your result. 

Regards,
Asit Nautiyal
From: [email protected] [[email protected]] on behalf of Andreas Hubmer [[email protected]]
Sent: Tuesday, May 12, 2015 6:07 PM
To: MarkLogic Developer Discussion
Subject: [MarkLogic Dev General] Performance of cts:element-values

Hi,

I am retrieving the values of several elements and would like to know whether there is a performance difference between
* calling cts:element-values((xs:QName("a"), xs:QName("b")))
* and calling cts:element-values(xs:QName("a")) and cts:element-values(xs:QName("b")) separately and manually merging the values.

Why do I want to do it manually? Actually I will not only use cts:element-values but also cts:element-attribute-values. I will have a dynamic list of element names and element+attribute names and want to retrieve all their values and frequencies.

Regards,
Andreas


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