Dandandan commented on code in PR #13187:
URL: https://github.com/apache/datafusion/pull/13187#discussion_r1824330274
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datafusion/physical-plan/src/filter.rs:
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@@ -371,7 +371,12 @@ impl ExecutionPlan for FilterExec {
/// The output statistics of a filtering operation can be estimated if the
/// predicate's selectivity value can be determined for the incoming data.
fn statistics(&self) -> Result<Statistics> {
- Self::statistics_helper(&self.input, self.predicate(),
self.default_selectivity)
+ let stats = Self::statistics_helper(
Review Comment:
I think the global stats (`total_byte_size`) are not correct either, doesn't
take into account the reduced number of columns. It should do something similar
as `stats_projection` for `ProjectionExec`
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