NobiGo commented on code in PR #3908:
URL: https://github.com/apache/calcite/pull/3908#discussion_r1716602508
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core/src/main/java/org/apache/calcite/plan/hep/HepPlanner.java:
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@@ -186,14 +186,14 @@ public HepPlanner(
}
@Override public RelNode findBestExp() {
- requireNonNull(root, "root");
+ requireNonNull(root, "'root' must not be null");
Review Comment:
Ok. If we keep consistent with VolcanoPlanner. We can change VolcanoPlanner
error info to `'root' must not be null`
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