viirya commented on code in PR #8402:
URL: https://github.com/apache/arrow-datafusion/pull/8402#discussion_r1413192752
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datafusion/optimizer/src/analyzer/type_coercion.rs:
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@@ -503,7 +503,10 @@ fn coerce_window_frame(
let target_type = match window_frame.units {
WindowFrameUnits::Range => {
if let Some(col_type) = current_types.first() {
- if col_type.is_numeric() || is_utf8_or_large_utf8(col_type) {
+ if col_type.is_numeric()
+ || is_utf8_or_large_utf8(col_type)
+ || matches!(col_type, DataType::Null)
Review Comment:
Hmm, the null must be the first order by expression, does it?
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