** Changed in: zeitgeist
Status: In Progress => Fix Committed
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Prefix search is not using an index
https://bugs.launchpad.net/bugs/641198
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Status in Zeitgeist Framework: Fix Committed
Bug description:
In the prefix search we are using a 'GLOB' sql-statement, this statement is not
using the index and thus slow, some timings from me running the attached script:
* Database with ~50k events
* ~1% of these event have a subject with uri beginning with 'http://aa'
* searching for all uris beginning with 'http://aa' using the 'GLOB' expression
(what we have now in lp:zeitgeist) takes ~0.03 sec
* changing this query to some (x >= S AND x < T) statement reduces this time to
~0.002 sec
This is easy to implement (and test) for ascii chars, but as we support unicode
esp. testing seems to be a bit tricky
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