Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/14883#discussion_r77115989
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/ExternalCatalog.scala
---
@@ -184,4 +184,9 @@ abstract class ExternalCatalog {
def listFunctions(db: String, pattern: String): Seq[String]
+ //
--------------------------------------------------------------------------
+ // Resources
+ //
--------------------------------------------------------------------------
+
+ def addJar(path: String): Unit
--- End diff --
Let me rephrase it.
>Add a JAR resource to the underlying external catalog for DDL (e.g. CREATE
TABLE) and DML (e.g., LOAD TABLE) operations.
>For example, when users create a Hive serde table, they can specify a
custom Serializer-Deserializer (SerDe) class. When Hive metastore is unable to
access the custom SerDe JAR (e.g., not on the Hive classpath), the JAR file
must be added at runtime using this API.
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