HyukjinKwon commented on a change in pull request #28597:
URL: https://github.com/apache/spark/pull/28597#discussion_r428989788
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File path: sql/core/src/main/scala/org/apache/spark/sql/functions.scala
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@@ -1797,7 +1797,7 @@ object functions {
/**
* Returns the least value of the list of values, skipping null values.
- * This function takes at least 2 parameters. It will return null iff all
parameters are null.
Review comment:
`iff` is if and only if
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