eejbyfeldt commented on code in PR #13187:
URL: https://github.com/apache/datafusion/pull/13187#discussion_r1823268793
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datafusion/common/src/stats.rs:
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@@ -258,6 +258,26 @@ impl Statistics {
self
}
+ /// Project the statistics to the given column indices.
+ ///
+ /// For example, if we had statistics for columns `{"a", "b", "c"}`,
+ /// projecting to `vec![2, 1]` would return statistics for columns `{"c",
+ /// "b"}`.
+ pub fn project(mut self, projection: Option<&Vec<usize>>) -> Self {
Review Comment:
Should this method also be used when we project the statistics in hash_join?
https://github.com/alamb/datafusion/blob/86690fda27ddf7b983cf5597f5bde26ec70a725d/datafusion/physical-plan/src/joins/hash_join.rs#L790
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