alamb commented on code in PR #6593:
URL: https://github.com/apache/arrow-rs/pull/6593#discussion_r1809227281
##########
arrow-array/src/builder/struct_builder.rs:
##########
@@ -275,6 +276,31 @@ pub fn make_builder(datatype: &DataType, capacity: usize)
-> Box<dyn ArrayBuilde
t => panic!("The field of Map data type {t:?} should has a child
Struct field"),
},
DataType::Struct(fields) =>
Box::new(StructBuilder::from_fields(fields.clone(), capacity)),
+ DataType::Dictionary(key_type, value_type) if **key_type ==
DataType::Int32 => {
+ match &**value_type {
+ DataType::Utf8 => {
+ let dict_builder: StringDictionaryBuilder<Int32Type> =
+ StringDictionaryBuilder::with_capacity(capacity, 32,
1024);
Review Comment:
Looks to me like the standard capacity is `256` for values in
https://github.com/apache/arrow-rs/blob/20433530e7f60fa9ff45ae7c51c3e5ab27c7a2d0/arrow-array/src/array/dictionary_array.rs#L659-L658
I'll push a commit to match that.
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