Micah Kornfield created ARROW-13673:
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Summary: [C++] BinaryBuilder doesn't preserve passed in DataType
Key: ARROW-13673
URL: https://issues.apache.org/jira/browse/ARROW-13673
Project: Apache Arrow
Issue Type: Bug
Components: C++
Affects Versions: 5.0.0
Reporter: Micah Kornfield
There is a
[constructor|https://github.com/apache/arrow/blob/1430c93f68960e10a50d27f465eb174e76ac06b2/cpp/src/arrow/array/builder_binary.h#L56]
that takes a datatype for binary builder but it is discarded. When
constructing an Array the type is always the value returned from type()
[binary|https://github.com/apache/arrow/blob/1430c93f68960e10a50d27f465eb174e76ac06b2/cpp/src/arrow/array/builder_binary.h#L390]
If a consumer of the API wants to have an extension array this prevents them
from passing the extension type though.
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