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https://issues.apache.org/jira/browse/JCR-1064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12522132
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Ard Schrijvers commented on JCR-1064:
-------------------------------------
AFAICS, the matchAllScorer won't be needed anymore with the new index format.
Therefor, I won't add the changes to matchAllScorer that I had, because it
implies that it scorer needs to know the format. For those interested, the
improvement was like:
if(newFormat){
TermDocs docs = reader.termDocs(new
Term(FieldNames.PROPERTIES_SET,field));
while (docs.next()) {
docFilter.set(docs.doc());
}
docs.close();
} else {
String namedValue = FieldNames.createNamedValue(field, "");
TermEnum terms = reader.terms(new Term(FieldNames.PROPERTIES,
namedValue));
try {
TermDocs docs = reader.termDocs();
try {
while (terms.term() != null
&& terms.term().field() == FieldNames.PROPERTIES
&& terms.term().text().startsWith(namedValue)) {
docs.seek(terms);
while (docs.next()) {
docFilter.set(docs.doc());
}
terms.next();
}
} finally {
docs.close();
}
} finally {
terms.close();
}
}
> 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
>
>
> //[EMAIL PROTECTED] 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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