xndai commented on a change in pull request #1884:
URL: https://github.com/apache/calcite/pull/1884#discussion_r416318044
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File path:
core/src/main/java/org/apache/calcite/plan/volcano/VolcanoPlanner.java
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@@ -764,6 +764,13 @@ RelNode changeTraitsUsingConverters(
// will be left as is. Finally, any null entries in toTraits are
// ignored.
RelNode converted = rel;
+ Convention conventionTrait = null;
+ for (RelTrait trait : toTraits) {
+ if (trait instanceof Convention) {
+ conventionTrait = (Convention) trait;
+ break;
+ }
+ }
Review comment:
yes, good idea.
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