linhongliu-db commented on a change in pull request #30666:
URL: https://github.com/apache/spark/pull/30666#discussion_r538183678
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalog.scala
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@@ -1484,16 +1514,37 @@ class SessionCatalog(
def lookupFunction(
name: FunctionIdentifier,
children: Seq[Expression]): Expression = synchronized {
+
// Note: the implementation of this function is a little bit convoluted.
// We probably shouldn't use a single FunctionRegistry to register all
three kinds of functions
// (built-in, temp, and external).
if (name.database.isEmpty && functionRegistry.functionExists(name)) {
- // This function has been already loaded into the function registry.
- return functionRegistry.lookupFunction(name, children)
Review comment:
Below changes will be removed after
https://github.com/apache/spark/pull/30662 is merged
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