Chetan Mehrotra created OAK-4904:
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Summary: For unique indexes avoid consulting indexes other than
property index
Key: OAK-4904
URL: https://issues.apache.org/jira/browse/OAK-4904
Project: Jackrabbit Oak
Issue Type: Improvement
Components: query
Reporter: Chetan Mehrotra
Assignee: Chetan Mehrotra
Fix For: 1.6
Currently for queries involving unique index like
{noformat}
SELECT * FROM [nt:base] WHERE [jcr:uuid] = $id
{noformat}
QueryEngine would start consulting all types of index in order of minimum cost.
Where minimum cost are
* PropertyIndex - 2.0
* LucenePropertyIndex - 2.1
For such queries in case of match property index returns a cost of (base) 2 +
(count) 1 = 3 due to which QE has to consult Lucene index also. Given such
queries a very frequent it would be better to avoid consulting Lucene index as
that adds unnecessary overhead
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