Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/16476#discussion_r95024068
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala
---
@@ -340,3 +341,91 @@ object CaseKeyWhen {
CaseWhen(cases, elseValue)
}
}
+
+/**
+ * A function that returns the index of str in (str1, str2, ...) list or 0
if not found.
+ * It takes at least 2 parameters, and all parameters' types should be
subtypes of AtomicType.
+ */
+@ExpressionDescription(
+ usage = "_FUNC_(str, str1, str2, ...) - Returns the index of str in the
str1,str2,... or 0 if not found.",
+ extended = """
+ Examples:
+ > SELECT _FUNC_(10, 9, 3, 10, 4);
--- End diff --
can we use strings as examples rather than integer literals?
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