NestedQueryEvaluator

rust_rule_engine::backward::nested

Struct NestedQueryEvaluator 

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pub struct NestedQueryEvaluator;
Expand description

Evaluator for nested queries

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impl NestedQueryEvaluator

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pub fn evaluate( nested: &NestedQuery, initial_bindings: &Bindings, ) -> NestedQueryResult

Evaluate a nested query

Algorithm:

  1. Evaluate the subquery to get intermediate results
  2. For each subquery result, bind variables in outer goal
  3. Evaluate outer goal with those bindings
  4. Collect and merge all solutions

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