viirya commented on code in PR #9223:
URL: https://github.com/apache/arrow-datafusion/pull/9223#discussion_r1527196814
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datafusion/core/src/physical_optimizer/pruning.rs:
##########
@@ -318,6 +327,19 @@ pub trait PruningStatistics {
/// `x = 5 AND y = 10` | `x_min <= 5 AND 5 <= x_max AND y_min <= 10 AND 10 <=
y_max`
/// `x IS NULL` | `x_null_count > 0`
///
+/// In addition, for a given column `x`, the `x_null_count` and `x_row_count`
will
Review Comment:
It is better to mention `x_row_count` in the beginning above, i.e.,
```
/// For example, given a column `x`, the `x_min` and `x_max`, `x_null_count`
and `x_row_count`
/// represent the minimum and maximum values, and the null count of column
`x`,
```
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