[jira] [Created] (ARROW-12861) [C++][Compute] Add sign function kernels

[Eduardo Ponce (Jira)]

Eduardo Ponce created ARROW-12861:
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             Summary: [C++][Compute] Add sign function kernels
                 Key: ARROW-12861
                 URL: https://issues.apache.org/jira/browse/ARROW-12861
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Eduardo Ponce
            Assignee: Eduardo Ponce
             Fix For: 5.0.0


Add the sign function to the compute kernels.

sign(x) =
 * 1 if x > 0
 * 0 if x = 0
 * -1 if x < 0



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