feiniaofeiafei commented on code in PR #43391:
URL: https://github.com/apache/doris/pull/43391#discussion_r1856440047
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/properties/DataTrait.java:
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@@ -47,15 +51,15 @@ public class DataTrait {
public static final DataTrait EMPTY_TRAIT
= new DataTrait(new NestedSet().toImmutable(),
- new NestedSet().toImmutable(), new
ImmutableSet.Builder<FdItem>().build(),
+ new UniformDescription().toImmutable(), new
ImmutableSet.Builder<FdItem>().build(),
Review Comment:
Unnecessary. this pr use UniformDescription to record const value
expression. For unique, it is unnecessary.
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