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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/04/15 16:08:57 UTC

[GitHub] [arrow-datafusion] jychen7 commented on issue #2221: Aggregate func Approx_median not work with Parquet format

jychen7 commented on issue #2221:
URL: https://github.com/apache/arrow-datafusion/issues/2221#issuecomment-1100201872

   more context, it only fails for `approx_median`, and `approx_percentile_cont` works fine
   
   ```
   ❯ select approx_percentile_cont(tinyint_col, 0.5) from test;
   +-----------------------------------------------------+
   | APPROXPERCENTILECONT(test.tinyint_col,Float64(0.5)) |
   +-----------------------------------------------------+
   | 0                                                   |
   +-----------------------------------------------------+
   ```
   
   https://github.com/apache/arrow-datafusion/blob/9f2ed423dc63f9f5d0a5e586925d2c31e3b9f5b8/datafusion/core/src/optimizer/to_approx_perc.rs#L97-L100


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