tustvold commented on code in PR #7101:
URL: https://github.com/apache/arrow-rs/pull/7101#discussion_r1952340672
##########
arrow-array/src/builder/map_builder.rs:
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@@ -107,13 +108,27 @@ impl<K: ArrayBuilder, V: ArrayBuilder> MapBuilder<K, V> {
field_names: field_names.unwrap_or_default(),
key_builder,
value_builder,
+ key_field: None,
value_field: None,
}
}
/// Override the field passed to [`MapBuilder::new`]
///
- /// By default a nullable field is created with the name `values`
+ /// By default, a nullable field is created with the name `keys`
Review Comment:
```suggestion
/// By default, a non-nullable field is created with the name `keys`
```
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