manuzhang commented on code in PR #14593:
URL: https://github.com/apache/iceberg/pull/14593#discussion_r2585815722
##########
api/src/main/java/org/apache/iceberg/expressions/InclusiveMetricsEvaluator.java:
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@@ -327,6 +327,16 @@ public <T> Boolean eq(Bound<T> term, Literal<T> lit) {
public <T> Boolean notEq(Bound<T> term, Literal<T> lit) {
// because the bounds are not necessarily a min or max value, this
cannot be answered using
// them. notEq(col, X) with (X, Y) doesn't guarantee that X is a value
in col.
+ // However, when min == max and the file has no nulls or NaN values, we
can safely prune
+ // if that value equals the literal.
+ T uniqueValue = getUniqueValue(term);
+ if (uniqueValue == null) {
Review Comment:
This can be combined with below case
```java
if (uniqueValue != null && lit.comparator().compare(uniqueValue,
lit.value()) == 0) {
return ROWS_CANNOT_MATCH;
} else {
return ROWS_MIGHT_MATCH;
}
```
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