yevgenypats commented on code in PR #34454:
URL: https://github.com/apache/arrow/pull/34454#discussion_r1128584791
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go/arrow/datatype_extension.go:
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@@ -122,7 +124,9 @@ type ExtensionType interface {
// If the storage type is incorrect or something else is invalid with
the data this should
// return nil and an appropriate error.
Deserialize(storageType DataType, data string) (ExtensionType, error)
-
+ // this should return array.Builder interface but we cannot import due
to cycle import, so we use
+ // interface{} instead. At least for
+ NewBuilder(mem memory.Allocator, dt ExtensionType) interface{}
Review Comment:
Re breaking, I don't think this will breaking anything as there is a
[default](https://github.com/apache/arrow/pull/34454/files#diff-7fe93f07a80f96f7f99153486503543e8bb9443496a71ad078d6c6e9a8a5c39eR169)
in the `ExtensionType` that just returns `nil` to keep this backward
compatible so if this is not implement I call the old `NewExtensionBuilder` in
the `NewBuilder` function
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