davidhewitt commented on code in PR #14602:
URL: https://github.com/apache/datafusion/pull/14602#discussion_r1950573621
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datafusion/expr-common/src/type_coercion/binary.rs:
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@@ -537,8 +537,15 @@ fn type_union_resolution_coercion(
}
(DataType::Dictionary(index_type, value_type), other_type)
| (other_type, DataType::Dictionary(index_type, value_type)) => {
- let new_value_type = type_union_resolution_coercion(value_type,
other_type);
- new_value_type.map(|t| DataType::Dictionary(index_type.clone(),
Box::new(t)))
+ match type_union_resolution_coercion(value_type, other_type) {
+ // Dict(k, Utf8View) is redundant, Utf8View is good enough
+ Some(DataType::Utf8View) => Some(DataType::Utf8View),
Review Comment:
Possibly also true for binary views (even if I didn't report in my original
issue)?
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