killme2008 commented on issue #17557:
URL: https://github.com/apache/datafusion/issues/17557#issuecomment-3413707390
Looks like it follows the PG style:
```
In most implementations of the “not-a-number” concept, NaN is not considered
equal to any other numeric value (including NaN). In order to allow numeric
values to be sorted and used in tree-based indexes, PostgreSQL treats NaN
values as equal, and greater than all non-NaN values.
```
https://www.postgresql.org/docs/current/datatype-numeric.html
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