[GitHub] [arrow-datafusion] comphead commented on pull request #2324: Implementing math power function for SQL

[GitBox <gi...@apache.org>]

comphead commented on PR #2324:
URL: https://github.com/apache/arrow-datafusion/pull/2324#issuecomment-1107514476

   Implement math POWER function with signatures like [https://www.postgresql.org/docs/14/functions-math.html](url)
   
   
   Example usage
   >
           "SELECT power(i32, 3) as power_i32,
                    power(i64, 3) as power_i64,
                    power(f32, 3) as power_f32,
                    power(f64, 3) as power_f64,
                    power(2, 3) as power_int_scalar,
                    power(2.5, 3) as power_float_scalar
             FROM test";
   
   Output
   >
           "+-----------+-----------+-----------+-----------+------------------+--------------------+",
           "| power_i32 | power_i64 | power_f32 | power_f64 | power_int_scalar | power_float_scalar |",
           "+-----------+-----------+-----------+-----------+------------------+--------------------+",
           "| 8         | 8         | 1         | 1         | 8                | 15.625             |",
           "| 125       | 125       | 15.625    | 15.625    | 8                | 15.625             |",
           "| 0         | 0         | 0         | 0         | 8                | 15.625             |",
           "| -2744     | -2744     | -3048.625 | -3048.625 | 8                | 15.625             |",
           "|           |           |           |           | 8                | 15.625             |",
           "+-----------+-----------+-----------+-----------+------------------+--------------------+",


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