stevenzwu commented on code in PR #18604:
URL: https://github.com/apache/iceberg/pull/18604#discussion_r4374213379
##########
core/src/main/java/org/apache/iceberg/StatsUtil.java:
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@@ -325,4 +336,181 @@ private static boolean isScalar(Schema schema,
Map<Integer, Integer> parentIndex
return true;
}
+
+ /** Inclusive source column bounds for a partition value. Upper is null when
unbounded. */
+ record PartitionSourceBounds(Object lower, Object upper) {}
+
+ /**
+ * Returns the source column bounds for a partition value, or null for a NaN
identity value.
+ *
+ * @throws IllegalArgumentException if the transform does not preserve order
or the value is null
+ */
+ static PartitionSourceBounds sourceBoundsFor(
Review Comment:
`PartitionSourceBounds` name seems a bit inaccurate. It is not the
lower/upper bound for the partition source column. Rather, it is for the
lower/upper bound of the partition transform output.
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