andygrove commented on a change in pull request #7878:
URL: https://github.com/apache/arrow/pull/7878#discussion_r470889218
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File path: rust/datafusion/src/execution/context.rs
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@@ -450,6 +451,10 @@ impl ExecutionContext {
op.clone(),
self.create_physical_expr(right, input_schema)?,
))),
+ Expr::Length(expr) => Ok(Arc::new(Length::try_new(
Review comment:
I wonder if we really want to add a new `Expr` specifically for this
function when we already have way to register UDFs. It seems like it might be
better to treat it just like the other UDFs?
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