Github user nickwallen commented on the issue:
https://github.com/apache/metron/pull/681
I see in the unit tests that @ottobackwards intended that any equality with
`NaN` to be false. But then how is that useful for the basic use case of
`FUNCTION(x) != NaN`?
```
[Stellar]>>> SQRT(-1)
NaN
```
I would expect the following to return `true`.
```
[Stellar]>>> SQRT(-1) == NaN
false
```
I would expect the following to return `false`.
```
[Stellar]>>> SQRT(-1) != NaN
true
```
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