LantaoJin commented on a change in pull request #28938:
URL: https://github.com/apache/spark/pull/28938#discussion_r448086615
##########
File path:
sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveExternalCatalog.scala
##########
@@ -213,23 +234,23 @@ private[spark] class HiveExternalCatalog(conf: SparkConf,
hadoopConf: Configurat
client.alterDatabase(dbDefinition)
}
- override def getDatabase(db: String): CatalogDatabase = withClient {
+ override def getDatabase(db: String): CatalogDatabase = withClient(db) {
client.getDatabase(db)
}
- override def databaseExists(db: String): Boolean = withClient {
+ override def databaseExists(db: String): Boolean = withClient(db) {
client.databaseExists(db)
}
- override def listDatabases(): Seq[String] = withClient {
+ override def listDatabases(): Seq[String] = withClient() {
Review comment:
I think we don't need that. There are two reasons. First is these are
just read operations, no critical problems except getting dirty databases list.
Second, the underlay store of HiveMetastore such as MYSQL has locks itself.
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