Github user gczsjdy commented on a diff in the pull request:
https://github.com/apache/spark/pull/16476#discussion_r95060633
--- 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.",
--- End diff --
Yeah, it's more reasonable to use expr(n), thx.
Probably it should be AtomicType or NullType to support user's writing of
null.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
