andygrove commented on code in PR #2900:
URL: https://github.com/apache/arrow-datafusion/pull/2900#discussion_r921260745
##########
datafusion/optimizer/src/common_subexpr_eliminate.rs:
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@@ -289,15 +289,11 @@ fn build_project_plan(
}
}
- let mut schema = DFSchema::new_with_metadata(fields, HashMap::new())?;
- schema.merge(input.schema());
Review Comment:
~This is the fix for https://github.com/apache/arrow-datafusion/issues/2907.
This code is incorrect and is producing a projection output schema containing
all the fields from the input schema. The code now just relies on the logic in
`Projection::try_new` to produce a valid schema based on the projection
expressions.~
No, it wasn't the fix.
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