liyafan82 commented on a change in pull request #2027:
URL: https://github.com/apache/calcite/pull/2027#discussion_r441518623



##########
File path: core/src/main/java/org/apache/calcite/util/graph/Graphs.java
##########
@@ -56,42 +54,40 @@ public int size() {
   public static <V, E extends DefaultEdge> FrozenGraph<V, E> makeImmutable(
       DirectedGraph<V, E> graph) {
     DefaultDirectedGraph<V, E> graph1 = (DefaultDirectedGraph<V, E>) graph;
-    Map<Pair<V, V>, List<V>> shortestPaths = new HashMap<>();
+    Map<Pair<V, V>, int[]> shortestDistances = new HashMap<>();
     for (DefaultDirectedGraph.VertexInfo<V, E> arc
         : graph1.vertexMap.values()) {
       for (E edge : arc.outEdges) {
         final V source = graph1.source(edge);
         final V target = graph1.target(edge);
-        shortestPaths.put(Pair.of(source, target),
-            ImmutableList.of(source, target));
+        shortestDistances.put(Pair.of(source, target), new int[] {1});
       }
     }
     while (true) {
       // Take a copy of the map's keys to avoid
       // ConcurrentModificationExceptions.
       final List<Pair<V, V>> previous =
-          ImmutableList.copyOf(shortestPaths.keySet());
-      int changeCount = 0;
+          ImmutableList.copyOf(shortestDistances.keySet());
+      boolean changeCount = false;

Review comment:
       Revised. Thanks for your kind reminder. 




----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

For queries about this service, please contact Infrastructure at:
us...@infra.apache.org


Reply via email to