korowa commented on code in PR #5261:
URL: https://github.com/apache/arrow-datafusion/pull/5261#discussion_r1104521780
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datafusion/optimizer/src/push_down_projection.rs:
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@@ -523,13 +523,24 @@ fn push_down_scan(
}
}
+ // Building new projection from BTreeSet
+ // preserving source projection order if it exists
+ let projection = if let Some(original_projection) = &scan.projection {
+ original_projection
Review Comment:
True, I guess, in this case we should return error -- I thought this case
could be handled while
[creating](https://github.com/apache/arrow-datafusion/blob/master/datafusion/optimizer/src/push_down_projection.rs#L492)
BTreeSet of projection indices, but it uses `scan.source.schema()` rather than
projected schema.
I'll fix it later today. Thank you!
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