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From "Richard Cyganiak (Created) (JIRA)" <>
Subject [jira] [Created] (JENA-153) Query bug for large integers
Date Wed, 02 Nov 2011 15:09:32 GMT
Query bug for large integers

                 Key: JENA-153
             Project: Jena
          Issue Type: Bug
          Components: ARQ, Jena
            Reporter: Richard Cyganiak
            Priority: Minor

ARQ handles small xsd:integers fine, and it handles large xsd:integers fine, but there seems
to be some weirdness going on with integers of ~20 digits:

ASK {FILTER (200000/2=100000)} => true
ASK {FILTER (20000000/2=10000000)} => true
ASK {FILTER (2000000000/2=1000000000)} => true
ASK {FILTER (200000000000/2=100000000000)} => true
ASK {FILTER (20000000000000/2=10000000000000)} => true
ASK {FILTER (2000000000000000/2=1000000000000000)} => true
ASK {FILTER (200000000000000000/2=100000000000000000)} => true
ASK {FILTER (20000000000000000000/2=10000000000000000000)} => ***false***
ASK {FILTER (2000000000000000000000/2=1000000000000000000000)} => true
ASK {FILTER (200000000000000000000000/2=100000000000000000000000)} => true
ASK {FILTER (20000000000000000000000000/2=10000000000000000000000000)} => true

These were all tested in with an arbitrary target graph URI.

It works fine again if dividend and quotient are changed to xsd:decimal:

ASK {FILTER (20000000000000000000.0/2=10000000000000000000.0)} => true

I guess this may have something to do with Java's native long being used for xsd:integers
of some size, and BigInteger for others?

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