huaxingao commented on code in PR #15977:
URL: https://github.com/apache/iceberg/pull/15977#discussion_r3125736237
##########
api/src/main/java/org/apache/iceberg/expressions/Literals.java:
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@@ -747,4 +752,50 @@ public String toString() {
return "X'" + BASE16_ENCODING.encode(bytes) + "'";
}
}
+
+ /**
+ * A sentinel literal representing an explicit null default value. This is
distinct from a Java
+ * {@code null} literal reference, which means "not set." Engines use this
distinction to decide
+ * whether to fall back to initial-default when write-default is not set.
+ */
+ static class NullLiteral<T> implements Literal<T> {
Review Comment:
Added. Thanks
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