mustafasrepo opened a new issue, #4403: URL: https://github.com/apache/arrow-datafusion/issues/4403
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** Currently, there is no support for `NTILE` queries. When we run the query below ```sql SELECT NTILE(10) OVER (ORDER BY C12) as ntile1, NTILE(20) OVER (ORDER BY C12 DESC) as ntile2 FROM aggregate_test_100 ORDER BY C9 LIMIT 5 ``` we get the error `called Result::unwrap() on an Err value: "Plan(\"Coercion from [Int64] to the signature Exact([UInt64]) failed.\")` . I want support for queries involving `NTILE`. **Describe the solution you'd like** We should add an implementation for `NTILE` function first then, we should select the implementation during built-in window function creation in the [link](https://github.com/apache/arrow-datafusion/blob/fe8aee6730e503fd898ade2bef92791fe61411a4/datafusion/core/src/physical_plan/windows/mod.rs#L97). (For NTILE we will get not yet implemented error.). NTILE implementation can be done by extending ROW_NUMBER implementation in the [link](https://github.com/apache/arrow-datafusion/blob/master/datafusion/physical-expr/src/window/row_number.rs) **Describe alternatives you've considered** N.A **Additional context** It seems that (the error above indicates) there is also an issue during the parsing of the `NTILE` argument, hence the addition of `NTILE` functionality may require changing some other codes. -- 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]
