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From "Nitin Gupta (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OAK-8035) Debug logging when two or more indices have same or very close cost amounts doesn't work in case both indices belong to the same type of Query Index
Date Wed, 13 Feb 2019 10:09:00 GMT

    [ https://issues.apache.org/jira/browse/OAK-8035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16767015#comment-16767015
] 

Nitin Gupta commented on OAK-8035:
----------------------------------

[~tmueller] - yup -  I don't have commit rights . This is actually my first contribution
here. 

So - yeah you or [~teofili] can commit for me . Thanks a lot for the help .

> Debug logging when two or more indices have same or very close cost amounts doesn't work
in case both indices belong to the same type of Query Index
> ----------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: OAK-8035
>                 URL: https://issues.apache.org/jira/browse/OAK-8035
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: query
>            Reporter: Nitin Gupta
>            Assignee: Nitin Gupta
>            Priority: Major
>         Attachments: OAK-8035.patch, OAK-8035_2.patch
>
>
> Steps to reproduce -
>  # You would need two index definitions of same query index type , let's say fullText
index , having similar cost evaluations.
>  # Now while the index plan is evaluated you will notice that there should have been
a debug log saying that selected index has similar cost - this serves as an important warning
to either change the index definitions or the query ([https://github.com/apache/jackrabbit-oak/blob/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/query/QueryImpl.java#L1069#L1072)]
>  
> However If we have a look at this code block here - [https://github.com/apache/jackrabbit-oak/blob/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/query/QueryImpl.java#L1017#L1041] ,
there is no comparison for near best costs for index plans having same query index type .
>  
> cc : [~teofili]



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