lidavidm commented on a change in pull request #10557:
URL: https://github.com/apache/arrow/pull/10557#discussion_r663097931
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File path: cpp/src/arrow/compute/api_scalar.h
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@@ -589,6 +589,21 @@ ARROW_EXPORT
Result<Datum> IfElse(const Datum& cond, const Datum& left, const Datum& right,
ExecContext* ctx = NULLPTR);
+/// \brief CaseWhen behaves like a switch/case or if-else if-else statement:
for
+/// each row, select the first value for which the corresponding condition is
+/// true, or (if given) select the 'else' value, else emit null.
Review comment:
Yes, null is the same as false.
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