alamb commented on code in PR #11796:
URL: https://github.com/apache/datafusion/pull/11796#discussion_r1707995631
##########
datafusion/expr/src/type_coercion/binary.rs:
##########
@@ -890,15 +890,22 @@ fn dictionary_coercion(
/// 2. Data type of the other side should be able to cast to string type
fn string_concat_coercion(lhs_type: &DataType, rhs_type: &DataType) ->
Option<DataType> {
use arrow::datatypes::DataType::*;
- string_coercion(lhs_type, rhs_type).or(match (lhs_type, rhs_type) {
- (Utf8, from_type) | (from_type, Utf8) => {
- string_concat_internal_coercion(from_type, &Utf8)
- }
- (LargeUtf8, from_type) | (from_type, LargeUtf8) => {
- string_concat_internal_coercion(from_type, &LargeUtf8)
+ match (lhs_type, rhs_type) {
+ // If Utf8View is in any side, we coerce to Utf8.
Review Comment:
filed https://github.com/apache/datafusion/issues/11881 to track
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