View Source Ash.SatSolver (ash v3.4.32)

Tools for working with the satsolver that drives filter subset checking (for authorization)

Summary

Functions

Creates tuples of a boolean statement.

Returns b(not (left and right))

Returns b(not (left and not right))

Returns a statement expressing that the predicates are mutually exclusive.

Returns a statement expressing that the predicates are mutually exclusive and collectively exhaustive.

Returns a statement expressing that the predicates are mutually inclusive

Returns b(not (right and left))

Returns b(not (right and not left))

Returns true if the candidate filter returns the same or less data than the filter

Returns true if the relationship paths are synonymous from a data perspective

Transforms a statement to Conjunctive Normal Form(CNF), as lists of lists of integers.

Prepares a filter for comparison

Calls transform/2 and solves the expression

Remaps integers back to clauses

Functions

Creates tuples of a boolean statement.

i.e b(1 and 2) #=> {:and, 1, 2}

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find_non_equal_overlap(expression)

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left_excludes_right(left, right)

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Returns b(not (left and right))

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left_implies_right(left, right)

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Returns b(not (left and not right))

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lift_equals_out_of_in(expression)

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mutually_exclusive(predicates, acc \\ [])

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Returns a statement expressing that the predicates are mutually exclusive.

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mutually_exclusive_and_collectively_exhaustive(predicates)

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Returns a statement expressing that the predicates are mutually exclusive and collectively exhaustive.

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mutually_inclusive(predicates, acc \\ [])

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Returns a statement expressing that the predicates are mutually inclusive

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right_excludes_left(left, right)

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Returns b(not (right and left))

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right_implies_left(left, right)

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Returns b(not (right and not left))

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solutions_to_predicate_values(solution, bindings)

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split_in_expressions(sub_expr, non_equal_overlap)

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strict_filter_subset(filter, candidate)

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Returns true if the candidate filter returns the same or less data than the filter

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synonymous_relationship_paths?(left_resource, candidate, search, right_resource \\ nil)

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Returns true if the relationship paths are synonymous from a data perspective

Transforms a statement to Conjunctive Normal Form(CNF), as lists of lists of integers.

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transform(resource, expression)

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Prepares a filter for comparison

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transform_and_solve(resource, expression)

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Calls transform/2 and solves the expression

Remaps integers back to clauses