kou commented on issue #47101:
URL: https://github.com/apache/arrow/issues/47101#issuecomment-3111699602
I see. The following may work too:
```diff
diff --git a/cpp/src/arrow/record_batch.cc b/cpp/src/arrow/record_batch.cc
index 04d6890d39..42fd375b0f 100644
--- a/cpp/src/arrow/record_batch.cc
+++ b/cpp/src/arrow/record_batch.cc
@@ -525,7 +525,9 @@ Status EnumerateStatistics(const RecordBatch&
record_batch, OnStatistics on_stat
statistics.nth_statistics++;
statistics.key = ARROW_STATISTICS_KEY_DISTINCT_COUNT_EXACT;
statistics.type = int64();
- statistics.value = column_statistics->distinct_count.value();
+ std::visit([&statistics](auto value) {
+ statistics.value = value;
+ }, column_statistics->distinct_count.value());
RETURN_NOT_OK(on_statistics(statistics));
statistics.start_new_column = false;
}
```
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