How to query SQL database from Prolog and use the queried result as facts?

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Osiris Xu

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Jul 25, 2014, 9:32:17 PM7/25/14
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Is it possible to couple Prolog to Relational Databases, SQL for example, and use commands like the following

   ancestor(X, Y) :- SQL('SELECT CHILD, PARENT INTO X, Y
                                    FROM FATHER WHERE CHILD =X').
   ancestor(X, Y) :- father(X, Z), ancestor(Z,Y).


to query SQL database from Prolog and use the queried result as facts?


norbert...@gmail.com

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Jul 26, 2014, 6:08:12 AM7/26/14
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Carlo Capelli

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Jul 26, 2014, 9:03:45 AM7/26/14
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Take a look at library(odbc), here for instance.

Syntax is different than what you show, and of course you need ODBC installed,
OTOH it works with whatever DB has a driver - nearly all.

About your syntax: I think will be difficult you find any compiler for a 'mixed' recursive query - but I could be wrong
Carlo


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