WZhuo opened a new pull request, #754:
URL: https://github.com/apache/iceberg-cpp/pull/754
When a column has a single unique value (no nulls, no NaNs, and lower bound
== upper bound), notEq(X) and notIn({...X...}) can prune files where that
unique value matches the predicate, returning ROWS_CANNOT_MATCH. Previously
these always returned ROWS_MIGHT_MATCH, never pruning.
This mirrors the upstream Java InclusiveMetricsEvaluator.uniqueValue()
logic. The StrictMetricsEvaluator is unchanged: its existing bounds-based
notEq/notIn logic already covers the single-value case, matching upstream Java
which has no uniqueValue helper there.
Ports the corresponding testNotEqWithSingleValue/testNotInWithSingleValue
cases from the Java test suite.
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