Github user windpiger commented on a diff in the pull request:
https://github.com/apache/spark/pull/17001#discussion_r103605667
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/ExternalCatalog.scala
---
@@ -74,7 +77,19 @@ abstract class ExternalCatalog {
*/
def alterDatabase(dbDefinition: CatalogDatabase): Unit
- def getDatabase(db: String): CatalogDatabase
+ def getDatabase(db: String): CatalogDatabase = {
+ val database = getDatabaseInternal(db)
+ // The default database's location always uses the warehouse path.
+ // Since the location of database stored in metastore is qualified,
+ // we also make the warehouse location qualified.
+ if (db == SessionCatalog.DEFAULT_DATABASE) {
--- End diff --
I think if we create an default instance of `CatalogDatabase`, we will
add more logic to other interfaces, such as `databaseExists` ,we need to add
the logic that if it is default database, we always return true even if there
is no default database in hive.
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