theirix opened a new pull request, #24580:
URL: https://github.com/apache/datafusion/pull/24580

   ## Which issue does this PR close?
   
   - Closes #3039.
   
   ## Rationale for this change
   
   I recently refined null support for `median` / `percentile_cont` and their 
approximate counterparts `approx_median, `appprox_percentile_cont`
   
   With the following tests for `NaN` for percentiles, the behaviour of all 
four functions for `NaN` and nulls is defined and covered by tests in 
`aggregate.slt`
   
   ## What changes are included in this PR?
   
   Missing tests for `NaN` for two functions
   
   ## Are these changes tested?
   
   Verified with DuckDB and PostgreSQL
   
   ## Are there any user-facing changes?
   
   <!--
   If there are user-facing changes then we may require documentation to be 
updated before approving the PR.
   
   If there are any breaking changes to public APIs, please add the `api 
change` label.
   -->
   


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