ngsg commented on code in PR #5955:
URL: https://github.com/apache/hive/pull/5955#discussion_r2209349397


##########
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/conf/MetastoreConf.java:
##########
@@ -1728,6 +1728,10 @@ public enum ConfVars {
                     " and password. Any other value is ignored right now but 
may be used later."
                 + "If JWT- Supported only in HTTP transport mode. If set, HMS 
Client will pick the value of JWT from "
                 + "environment variable HMS_JWT and set it in Authorization 
header in http request"),
+    METASTORE_CLIENT_CLASS("metastore.client.class",
+        "hive.metastore.client.class",
+        "org.apache.hadoop.hive.metastore.client.ThriftHiveMetaStoreClient",
+        "The name of MetaStoreClient class that implements the 
IMetaStoreClient interface."),

Review Comment:
   > From my point of view, I would suggest the pattern(the database or table) 
or the catalog routed way to choose which the client will use to obtain the 
metadata.
   
   I believe this is somewhat similar to the design proposed in HIVE-28879 
(Federated Catalog).
   From my perspective, I see HIVE-12679 as a milestone for both HIVE-28658 
(Iceberg REST Catalog, #5628) and HIVE-28879. So, I'm fine with moving directly 
to HIVE-28879 or pursuing any other approach, as long as we aim to support 
third-party data catalogs. However, since this ticket predates my contributions 
and has many watchers, I want to ask for and respect others' opinions as well.



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