# Function arrow_ord::cmp::not_distinct

source ยท ```
pub fn not_distinct(
lhs: &dyn Datum,
rhs: &dyn Datum,
) -> Result<BooleanArray, ArrowError>
```

## Expand description

Perform `left IS NOT DISTINCT FROM right`

operation on two `Datum`

`not_distinct`

is similar to `eq`

, only differing in null handling. In particular, two
operands are considered `NOT DISTINCT`

if they have the same value or if both of them
is NULL. The result of `not_distinct`

is never NULL.

For floating values like f32 and f64, this comparison produces an ordering in accordance to the totalOrder predicate as defined in the IEEE 754 (2008 revision) floating point standard. Note that totalOrder treats positive and negative zeros as different. If it is necessary to treat them as equal, please normalize zeros before calling this kernel.

Please refer to `f32::total_cmp`

and `f64::total_cmp`