Hi!
I've been trying to parameterize Datalog queries and have stumbled into a
problem with the tables in queries. As an example (from Datalog documentation):
#lang racket
(require datalog)
(define family (make-theory))
(datalog family
(! (parent joseph2 joseph1))
(! (parent joseph2 lucy))
(! (parent joseph3 joseph2)))
-now if I run the query as shown in the documentation
(let ([x 'joseph2])
(datalog family
(? (parent x X))))
the answer is as expected:
'(#hasheq((X . joseph1)) #hasheq((X . lucy)))
However, if I parameterize the table:
(let ([x 'parent])
(datalog family
(? (x 'joseph2 X))))
the query fails:
'()
Are there any workarounds for this? I am grateful for any suggestions...
Best regards,
Mikko Tiihonen
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