crepererum commented on code in PR #8779:
URL: https://github.com/apache/arrow-datafusion/pull/8779#discussion_r1444843586
##########
datafusion/physical-expr/src/aggregate/count_distinct.rs:
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@@ -83,6 +83,11 @@ macro_rules! float_distinct_count_accumulator {
}};
}
+/// Returns the estimated number of hashbrown hashtables is likely to come up
again
Review Comment:
```suggestion
/// Returns the estimated number of hashbrown hashtables.
```
Also, can someone explain the reasoning behind this formula? Is it based on
the hashbrown source code (in which case a link to the code would be nice)? CC
@korowa
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