Thomas Mueller created OAK-6897:
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Summary: XPath query: option to _not_ convert "or" to "union"
Key: OAK-6897
URL: https://issues.apache.org/jira/browse/OAK-6897
Project: Jackrabbit Oak
Issue Type: Improvement
Components: query
Reporter: Thomas Mueller
Assignee: Thomas Mueller
Fix For: 1.9.0
Right now, all XPath queries that contain "or" of the form "@a=1 or @b=2" are
converted to SQL-2 "union". In some cases, this is a problem, specially in
combination with "order by @jcr:score desc".
Now that SQL-2 "or" conditions can be converted to union (depending if union
has a lower cost), it is no longer strictly needed to do the union conversion
in the XPath conversion. Or at least emit different SQL-2 queries and take the
one with the lowest cost.
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