18 lines
571 B
Plaintext
18 lines
571 B
Plaintext
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(local Sqlog (require :sqlog))
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(import-macros {: $ : query : specify} :sqlog.macros)
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(local s (Sqlog))
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(s:deftable :parent :parent :child)
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(specify s
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(* [generation name (|| name " jr") 2] [parent name (|| name " jr")])
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(* [generation name (|| name " iii") 3] [ancestor name (|| name " iii")])
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(* [ancestor x y 1] [parent x y])
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(* [ancestor x y (+ gen 1)] [parent x z] [ancestor z y gen])
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[parent :bob "bob jr"]
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[parent "bob jr" "bob iii"]
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[parent :bob :fred]
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[parent :fred :jim]
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[parent :fred :betty])
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(pp (query s [generation :bob descendant gen]))
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