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  1. Apache Arrow
  2. ARROW-229

[C++] Implement safe casts for primitive types

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Details

    • New Feature
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • None
    • 0.7.0
    • C++
    • None

    Description

      In some situations, you want to cast the data in a PrimitiveArray to a different (but similar) data type, e.g. from uint32_t to int32_t or uint32_t to uint8_t. This can either be done by reinterpreting the data or needs to involve a copy if the size of the underlying type changes. There is already an implementation for this in parquet-cpp that could be pulled out into Arrow: https://github.com/apache/parquet-cpp/blob/9a0407e684c0a6299d0e6ab98c11c1162915c0ee/src/parquet/arrow/writer.cc#L71

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              wesm Wes McKinney
              uwe Uwe Korn
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                Updated:
                Resolved: