Omega359 commented on code in PR #13356:
URL: https://github.com/apache/datafusion/pull/13356#discussion_r1839178374
##########
datafusion/functions/src/core/nullif.rs:
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@@ -61,9 +41,13 @@ impl Default for NullIfFunc {
impl NullIfFunc {
pub fn new() -> Self {
Self {
- signature: Signature::uniform(
- 2,
- SUPPORTED_NULLIF_TYPES.to_vec(),
+ signature: Signature::one_of(
+ // Hack: String is at the beginning so the return type is
String if both args are Nulls
Review Comment:
Not sure I'd call that a hack tbh
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