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  1. Apache Arrow
  2. ARROW-12657

[C++][Python][Compute] String hex to numeric conversion and bit shifting

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      Hi Apache Arrow Community,

      thanks for the great work on this project - it is really a game changer. I've started to use it more frequently since more and more compute kernels became available.

      However, I have a current requirement which I can't fulfill, yet. More concretely, I have hex values as strings. I need to convert them to numeric type (int) and apply bit shifting.

      Currently, I can't find a way to do so. I tried type casts (string to int) like 

      import pyarrow as pa
      
      array = pa.array(["0x2001591", "0x2000848", "0x2000123"])
      array.cast(pa.uint32())

      However this results in ArrowInvalid: Failed to parse string: '0x2000123' as a scalar of type uint32. 

      Moreover, I will need to apply bit shifting once converted. I'm not sure if there is anything comparable in the compute kernels, yet.

      Thanks for any help in advance.
       
       

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              wmalpica William Malpica
              Wöllert Franz
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