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From "Ard Schrijvers (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-1064) Optimize queries that check for the existence of a property
Date Tue, 28 Aug 2007 07:25:31 GMT

    [ https://issues.apache.org/jira/browse/JCR-1064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12523176
] 

Ard Schrijvers commented on JCR-1064:
-------------------------------------

> well, that just means that there is no appropriate test  

You mean that the tests just happen to work with new and old format by coincidence?  I just
really am in the assumption, that a query is done on one index at the time, and wether this
index is in the old or new format does not matter. Wether the system index is in old format,
and the query runs on a workspace index in new format shouldn't give problems AFAICS. IMO,
it is possible to port the jr impl to the new version while keeping all the indices, and when
adding a new workspace, only this workspace will run in the new format.  But I do not have
the overview like you do, so I probably just miss something :-). I'll stop worrying about
it and go for your solution.

> WRT the bootstrapping issue with the index and its format, I will create a separate issue
and extract the initial index creation from the >MultiIndex constructor. See JCR-1093.
Once this is solved, you can set the index format version before indexing the workspace. 

That would be very nice. When you have finished, I'll create a new patch

> that's actually another point that should be changed. There should be a default value.
I suggest we set it to V1.

Agreed. 

I'll wait for JCR-1093 and then create a new patch. 

> Optimize queries that check for the existence of a property
> -----------------------------------------------------------
>
>                 Key: JCR-1064
>                 URL: https://issues.apache.org/jira/browse/JCR-1064
>             Project: Jackrabbit
>          Issue Type: Improvement
>          Components: indexing
>    Affects Versions: 1.3.1
>            Reporter: Ard Schrijvers
>            Priority: Minor
>             Fix For: 1.4
>
>         Attachments: JCR-1064-2.patch, JCR-1064-2.patch, JCR-1064-2.patch, JCR-1064-DEPR.patch
>
>
> //*[@mytext] is transformed into the org.apache.jackrabbit.core.query.lucene.MatchAllQuery,
that through the MatchAllWeight uses the MatchAllScorer.  The calculateDocFilter() in MatchAllScorer
 does not scale and becomes slow for growing number of nodes. 
> Solution: lucene documents will get a new Field:
> public static final String PROPERTIES_SET = "_:PROPERTIES_SET".intern();
> that holds the available properties of this document. 
> NOTE: Lucene indices build without this performance improvement should still work and
fall back to the original implementation

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