[GitHub] [arrow-datafusion] comphead commented on issue #3039: Review `NaN` handling in `median` and `approx_median`

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

comphead commented on issue #3039:
URL: https://github.com/apache/arrow-datafusion/issues/3039#issuecomment-1306062757

   Hi @andygrove Im working on https://github.com/apache/arrow-datafusion/issues/4051 and found your comments.
   I ran tests in postgres
   ```
   /*
   create table t (x real);
   		insert into t (x) values (1.1);
   		insert into t (x) values ('NaN');
   		insert into t (x) values ('NaN');
   		insert into t (x) values ('NaN');
   */
           
   select 1 from (select PERCENTILE_CONT(0.5) WITHIN GROUP(ORDER BY x) a FROM t) b where a != 'NaN'::NUMERIC;        
   ```
   So looks like datafusion behaviuor and postgres are the same


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