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Fix bug in cheapest path algorithm

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This commit is contained in:
Loïc Lecrenier 2023-05-16 17:01:30 +02:00
parent 5758268866
commit ec8f685d84
1 changed files with 9 additions and 13 deletions
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16
milli/src/search/new/ranking_rule_graph/cheapest_paths.rs
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@ -209,7 +209,7 @@ impl<G: RankingRuleGraphTrait> RankingRuleGraph<G> {
self.traverse_breadth_first_backward(self.query_graph.end_node, |cur_node| {
if cur_node == self.query_graph.end_node {
*costs_to_end.get_mut(self.query_graph.end_node) = vec![0];
return true;
return;
}
let mut self_costs = Vec::<u64>::new();
@ -226,7 +226,6 @@ impl<G: RankingRuleGraphTrait> RankingRuleGraph<G> {
self_costs.dedup();
*costs_to_end.get_mut(cur_node) = self_costs;
true
});
costs_to_end
}
@ -246,19 +245,18 @@ impl<G: RankingRuleGraphTrait> RankingRuleGraph<G> {
for cost in costs.get(edge.dest_node).iter() {
costs_to_remove.remove(&(*cost + edge.cost as u64));
if costs_to_remove.is_empty() {
return false;
return;
}
}
}
if costs_to_remove.is_empty() {
return false;
return;
}
let mut new_costs = BTreeSet::from_iter(costs.get(cur_node).iter().copied());
for c in costs_to_remove {
new_costs.remove(&c);
}
*costs.get_mut(cur_node) = new_costs.into_iter().collect();
true
});
}
@ -269,7 +267,7 @@ impl<G: RankingRuleGraphTrait> RankingRuleGraph<G> {
pub fn traverse_breadth_first_backward(
&self,
from: Interned<QueryNode>,
mut visit: impl FnMut(Interned<QueryNode>) -> bool,
mut visit: impl FnMut(Interned<QueryNode>),
) {
let mut reachable = SmallBitmap::for_interned_values_in(&self.query_graph.nodes);
{
@ -312,15 +310,13 @@ impl<G: RankingRuleGraphTrait> RankingRuleGraph<G> {
continue;
}
unreachable_or_visited.insert(cur_node);
if visit(cur_node) {
visit(cur_node);
for prev_node in self.query_graph.nodes.get(cur_node).predecessors.iter() {
if !enqueued.contains(prev_node) && !unreachable_or_visited.contains(prev_node)
{
if !enqueued.contains(prev_node) && !unreachable_or_visited.contains(prev_node) {
stack.push_back(prev_node);
enqueued.insert(prev_node);
}
}
}
}
}
}