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Posted to github@arrow.apache.org by "comphead (via GitHub)" <gi...@apache.org> on 2023/02/13 00:25:28 UTC

[GitHub] [arrow-datafusion] comphead commented on issue #5259: Make `log` function to be in sync with PostgresSql

comphead commented on issue #5259:
URL: https://github.com/apache/arrow-datafusion/issues/5259#issuecomment-1427178897

   Other edgecases
   ```
   PG log(-1), log(-10, 1), log(10, -1)
   cannot take logarithm of a negative number
   
   DF
   +----------------+--------------------------+--------------------------+
   | log(Int64(-1)) | log(Int64(-1),Int64(10)) | log(Int64(1),Int64(-10)) |
   +----------------+--------------------------+--------------------------+
   | NaN            | NaN                      | NaN                      |
   +----------------+--------------------------+--------------------------+
   ```


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