velvia commented on a change in pull request #8688:
URL: https://github.com/apache/arrow/pull/8688#discussion_r525610462
##########
File path: rust/arrow/src/compute/kernels/boolean.rs
##########
@@ -149,6 +150,64 @@ pub fn is_not_null(input: &ArrayRef) ->
Result<BooleanArray> {
Ok(BooleanArray::from(Arc::new(data)))
}
+/// Copies original array, setting null bit to true if a secondary comparison
boolean array is set to true.
+/// Typically used to implement NULLIF.
+pub fn nullif<T>(
+ left: &PrimitiveArray<T>,
Review comment:
Hmmm, I'm trying this, but the return type becomes more complicated....
and as you pointed out, it doesn't help in the end. :-p
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