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New lib/datalog/aggregates.sx: (count R V Goal), (sum R V Goal), (min R V Goal), (max R V Goal). dl-eval-aggregate runs dl-find-bindings on the goal under the outer subst, collects distinct values of V, applies the operator, binds R. Empty input: count/sum return 0; min/max produce no binding (rule fails). Group-by emerges naturally from outer-subst substitution into the goal — `popular(P) :- post(P), count(N, U, liked(U, P)), >=(N, 3).` counts per-post. Stratifier extended: dl-aggregate-dep-edge contributes a negation-like edge so the aggregate's goal relation is fully derived before the aggregate fires (non-monotonicity respected). Safety relaxed for aggregates: goal-internal vars are existentials, only the result var becomes bound.
27 lines
845 B
Plaintext
27 lines
845 B
Plaintext
# Datalog conformance config — sourced by lib/guest/conformance.sh.
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LANG_NAME=datalog
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MODE=dict
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PRELOADS=(
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lib/datalog/tokenizer.sx
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lib/datalog/parser.sx
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lib/datalog/unify.sx
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lib/datalog/db.sx
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lib/datalog/builtins.sx
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lib/datalog/aggregates.sx
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lib/datalog/strata.sx
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lib/datalog/eval.sx
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)
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SUITES=(
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"tokenize:lib/datalog/tests/tokenize.sx:(dl-tokenize-tests-run!)"
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"parse:lib/datalog/tests/parse.sx:(dl-parse-tests-run!)"
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"unify:lib/datalog/tests/unify.sx:(dl-unify-tests-run!)"
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"eval:lib/datalog/tests/eval.sx:(dl-eval-tests-run!)"
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"builtins:lib/datalog/tests/builtins.sx:(dl-builtins-tests-run!)"
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"semi_naive:lib/datalog/tests/semi_naive.sx:(dl-semi-naive-tests-run!)"
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"negation:lib/datalog/tests/negation.sx:(dl-negation-tests-run!)"
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"aggregates:lib/datalog/tests/aggregates.sx:(dl-aggregates-tests-run!)"
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)
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