andygrove commented on a change in pull request #7796:
URL: https://github.com/apache/arrow/pull/7796#discussion_r459006369
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File path: rust/datafusion/src/execution/physical_plan/expressions.rs
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@@ -47,81 +47,43 @@ use arrow::compute::kernels::sort::{SortColumn,
SortOptions};
use arrow::datatypes::{DataType, Schema, TimeUnit};
use arrow::record_batch::RecordBatch;
-/// Represents an aliased expression
Review comment:
Ah, yes, I was confused. It doesn't make sense to have a physical alias
expression.
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