liyafan82 commented on a change in pull request #2027:
URL: https://github.com/apache/calcite/pull/2027#discussion_r441518399
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File path: core/src/main/java/org/apache/calcite/plan/ConventionTraitDef.java
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@@ -234,10 +234,10 @@ private ConversionData getConversionData(RelOptPlanner
planner) {
return pathMap;
}
- public List<Convention> getShortestPath(
+ public int getShortestDistance(
Review comment:
IMO, it would be an overkill to call getPaths() only to get the shortest
path.
To support this scenario, I have restored the getShortestPath API, and
implement it with BFS. It should be more efficient than the Dijkstra and Floyd
algorihtms.
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