📄️ CREATE EXTERNAL CATALOG
CREATE EXTERNAL CATALOG 用于创建 External Catalog；支持 Hive、Iceberg、Hudi 等。
📄️ DROP CATALOG
DROP CATALOG 用于删除指定的 external catalog。
📄️ SET CATALOG
SET CATALOG 用于切换到指定的 Catalog。
📄️ SHOW CATALOGS
SHOW CATALOGS queries all catalogs in the current StarRocks cluster, including the internal catalog and external catalogs.
📄️ SHOW CREATE CATALOG
SHOW CREATE CATALOG queries the creation statement of an external catalog.
