xiedeyantu commented on code in PR #4585:
URL: https://github.com/apache/calcite/pull/4585#discussion_r2440452268
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core/src/main/java/org/apache/calcite/rel/RelCollationTraitDef.java:
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@@ -87,4 +141,45 @@ private RelCollationTraitDef() {
RelOptPlanner planner, RelCollation fromTrait, RelCollation toTrait) {
return true;
}
+
+ /**
+ * Associates an optimized collation with its original collation.
+ * Used to preserve optimization history for trait satisfaction checking.
+ * The association is scoped to the planner's lifecycle.
+ */
+ public static void setOriginalCollation(
Review Comment:
I have change this name to registerCollationMapping.
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