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danchapmanme
Level 3
November 3, 2015
Solved

Force OAK index used

In AEM 6.0 using OAK, is it possible when writing a XPATH query to force what index is being used rather that letting the system determine which it thinks is the fastest evaluated index.

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joerghoh
joerghohAccepted solution
Employee
November 3, 2015

Hi,

it is not possible. You can use EXPLAIN to check why Oak uses a certain index.

kind regards,
Jörg

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6 replies

ogill
Employee
November 4, 2015

Hi,

can you take a screenshot of the output when you run the query with the "Explain Query" page, similar to [1].

Regards,

Opkar

[1] https://adobe-consulting-services.github.io/acs-aem-tools/images/explain-query/results.png

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Lokesh_Shivalingaiah
Lokesh_Shivalingaiah
Level 10
November 4, 2015

It should not be the case. However can you share your query ?

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danchapmanmeAuthor
Level 3
November 4, 2015

I am already using the explain tool. I have observed that it doesn't always pick the fastest - when lucene index is 510.0, cq:tag index is 310.0, it still prefers to use the slowest - traverse.

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kautuk_sahni
kautuk_sahni
Employee
November 4, 2015

Hi

Could you please share the use-case for the community.

 

Thanks and Regards

Kautuk Sahni

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Kautuk Sahni
Lokesh_Shivalingaiah
Lokesh_Shivalingaiah
Level 10
November 3, 2015

when it already uses the fastest index, any reason why you would like to override it ??

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joerghoh
joerghohAccepted solution
Employee
November 3, 2015

Hi,

it is not possible. You can use EXPLAIN to check why Oak uses a certain index.

kind regards,
Jörg

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