Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18544#discussion_r219505379
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveSessionCatalog.scala ---
@@ -131,14 +131,14 @@ private[sql] class HiveSessionCatalog(
Try(super.lookupFunction(funcName, children)) match {
case Success(expr) => expr
case Failure(error) =>
- if (functionRegistry.functionExists(funcName)) {
- // If the function actually exists in functionRegistry, it means
that there is an
- // error when we create the Expression using the given children.
+ if (super.functionExists(name)) {
+ // If the function actually exists in functionRegistry or
externalCatalog,
+ // it means that there is an error when we create the Expression
using the given children.
// We need to throw the original exception.
throw error
} else {
- // This function is not in functionRegistry, let's try to load
it as a Hive's
- // built-in function.
+ // This function is not in functionRegistry or externalCatalog,
--- End diff --
`This function does not exist(neither in functionRegistry or
externalCatalog) ...`
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