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From "Marcel Reutegger (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-1064) Optimize queries that check for the existence of a property
Date Tue, 28 Aug 2007 07:11:48 GMT

    [ https://issues.apache.org/jira/browse/JCR-1064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12523173
] 

Marcel Reutegger commented on JCR-1064:
---------------------------------------

> I am doing the tests, with the parent index in old format, and the workspace index in
new format,
> and this is no problem

well, that just means that there is no appropriate test

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.

> will never be called since indexFormatVersion == null. 

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

> 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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