javeme commented on code in PR #2408:
URL:
https://github.com/apache/incubator-hugegraph/pull/2408#discussion_r1455493193
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hugegraph-server/hugegraph-api/src/main/java/org/apache/hugegraph/api/graph/EdgeAPI.java:
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@@ -291,6 +291,19 @@ public String list(@Context GraphManager manager,
HugeGraph g = graph(manager, graph);
GraphTraversal<?, Edge> traversal;
+
+ // Optimize edge query. Return early when the EdgeLabel does not exist.
+ if (label != null && !g.existsEdgeLabel(label)) {
Review Comment:
We aim to optimize the scenario of adjacent edges query: such as
`g.V().out('follow')`, if the `g.V()` return a person v1 and a movie v2, the
movie vertex v2 has no 'follow' edge, so we don't need to query it from the
storage.
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