asolimando commented on code in PR #21904:
URL: https://github.com/apache/datafusion/pull/21904#discussion_r3159515895
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datafusion/functions/src/unicode/substrindex.rs:
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@@ -272,7 +272,7 @@ where
O: OffsetSizeTrait,
{
let num_rows = string_array.len();
- // Output is null IFF any input is null.
+ // Output is null if any input is null.
Review Comment:
It's also a pretty common short-hand for people working with databases, due
to the nature of the topic
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