AdamGS commented on code in PR #22604:
URL: https://github.com/apache/datafusion/pull/22604#discussion_r3320384359
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datafusion/physical-expr/src/projection.rs:
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@@ -661,7 +661,7 @@ impl ProjectionExprs {
for proj_expr in self.exprs.iter() {
let expr = &proj_expr.expr;
let col_stats = if let Some(col) = expr.downcast_ref::<Column>() {
- std::mem::take(&mut stats.column_statistics[col.index()])
+ column_statistics_at(&stats.column_statistics, col.index())
Review Comment:
Because I'm using `Column`, we currently assume it has stats. I think
falling back here to `unknown` is reasonable.
I think a follow up here might be to craft more accurate stats depending on
what created the virtual column.
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