[redland-dev] [Rasqal RDF Query Library 0000376]: patterns containing literals are very slow compared to FILTER

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://bugs.librdf.org/mantis/view.php?id=376 
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Reported By:                vermonster
Assigned To:                
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Project:                    Rasqal RDF Query Library
Issue ID:                   376
Category:                   query engine
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Query Language:             SPARQL 
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Date Submitted:             2010-07-09 01:25
Last Modified:              2010-07-09 01:25
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Summary:                    patterns containing literals are very slow compared
to FILTER
Description: 
The performance of a query 

...
?e a:Property "value" .

is much slower than

...
?e a:Property ?t .
FILTER (?t = "value")

(for a very small triplestore, returning 13 values, the latter takes
20msecs while the former takes over 21 seconds.

Is this to be expected?

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Issue History 
Date Modified    Username       Field                    Change               
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2010-07-09 01:25 vermonster     New Issue                                    
2010-07-09 01:25 vermonster     Query Language            => SPARQL          
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