andygrove opened a new pull request, #3811: URL: https://github.com/apache/datafusion-comet/pull/3811
## Which issue does this PR close? Closes #1036 ## Rationale for this change When casting floating-point negative zero (`-0.0`) to string, Spark normalizes it to `"0.0"` but Comet produces `"-0.0"`. Rather than fixing this edge case (which involves complexities deep in the native execution pipeline), we document it in the compatibility guide since negative zero and positive zero are semantically equivalent in IEEE 754. ## What changes are included in this PR? Adds a "Negative Zero" subsection under the Cast section of the compatibility guide explaining this behavior difference and linking to the tracking issue. ## How are these changes tested? Documentation-only change. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
