waitingkuo commented on issue #3996:
URL:
https://github.com/apache/arrow-datafusion/issues/3996#issuecomment-1340114871
@comphead this is to align with postgresql to output decimal instead of
decimal which could prevent something like this
```bash
❯ select date_part('millisecond', timestamp '2000-01-01T00:00:09.123456');
+------------------------------------------------------------------+
| datepart(Utf8("millisecond"),Utf8("2000-01-01T00:00:09.123456")) |
+------------------------------------------------------------------+
| 9123.455999999998 |
+------------------------------------------------------------------+
1 row in set. Query took 0.002 seconds.
```
note that this datafusion-cli is from the `date_part_f64` branch
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