[redland-dev] [Rasqal RDF Query Library 0000436]: queries involving calculations with large numbers return incorrect results unless scientific notation is used

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://bugs.librdf.org/mantis/view.php?id=436 
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Reported By:                cbdavis
Assigned To:                
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Project:                    Rasqal RDF Query Library
Issue ID:                   436
Category:                   query engine
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Query Language:             SPARQL 
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Date Submitted:             2011-04-02 09:06
Last Modified:              2011-04-02 09:06
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Summary:                    queries involving calculations with large numbers
return incorrect results unless scientific notation is used
Description: 
SPARQL queries that perform calculations return incorrect results when the
number is completely written out (3600000000), while correct results are given
when scientific notation is used (3.6E9).

Steps to Reproduce: 
Running 4store 1.1.2 with Raptor version 2.0.2 and Rasqal version 0.9.25.  

Tested using 4s-query

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://enipedia.tudelft.nl/wiki/Property:>
PREFIX cat: <http://enipedia.tudelft.nl/wiki/Category:>
select ?energy ((?energy / 3600000000) as ?energy_MWh) where {
<http://enipedia.tudelft.nl/wiki/Makung_Powerplant> prop:Energyoutput-23J
?energy .
} #EOQ

?energy   ?energy_MWh
"16599599986720"^^<http://www.w3.org/2001/XMLSchema#double>  
"-23885.4"^^<http://www.w3.org/2001/XMLSchema#double>
#EOR

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://enipedia.tudelft.nl/wiki/Property:>
PREFIX cat: <http://enipedia.tudelft.nl/wiki/Category:>
select ?energy ((?energy / 3.6E9) as ?energy_MWh) where {
<http://enipedia.tudelft.nl/wiki/Makung_Powerplant> prop:Energyoutput-23J
?energy .
} #EOQ

?energy   ?energy_MWh
"16599599986720"^^<http://www.w3.org/2001/XMLSchema#double>  
"4611"^^<http://www.w3.org/2001/XMLSchema#double>
#EOR

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Issue History 
Date Modified    Username       Field                    Change               
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2011-04-02 09:06 cbdavis        New Issue                                    
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