Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/11972#discussion_r57614602
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalog.scala
---
@@ -476,33 +497,29 @@ class SessionCatalog(externalCatalog:
ExternalCatalog, conf: CatalystConf) {
throw new AnalysisException("rename does not support moving
functions across databases")
}
val db = oldName.database.getOrElse(currentDb)
- if (oldName.database.isDefined ||
!tempFunctions.containsKey(oldName.funcName)) {
+ lazy val oldBuilder =
functionRegistry.lookupFunctionBuilder(oldName.funcName)
--- End diff --
if database is defined we don't need to do it; this could save us a call to
Hive
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