dengzhhu653 commented on code in PR #5629:
URL: https://github.com/apache/hive/pull/5629#discussion_r1946175399


##########
packaging/src/docker/README.md:
##########
@@ -210,3 +210,14 @@ docker compose down
     select count(distinct a) from hive_example;
     select sum(b) from hive_example;
   ```
+
+#### Hive Schema Tool
+
+`Hive Schema Tool` is located in the Docker Image at 
`/opt/hive/bin/schematool`. 
+Possible use cases are as follows,
+
+```shell
+docker run -d --env SERVICE_NAME=hiveserver2 --name hive4 
apache/hive:${HIVE_VERSION}
+docker exec -it hive4 /bin/bash
+/opt/hive/bin/schematool -info -dbType hive -metaDbType derby -url 
jdbc:hive2://localhost:10000/default

Review Comment:
   In order for HiveServer2 to read the `sys` table, the HiveServer2 needs to 
configure the properties to connect the backing db:
   ```
   javax.jdo.option.ConnectionURL
   javax.jdo.option.ConnectionDriverName
   javax.jdo.option.ConnectionUserName
   javax.jdo.option.ConnectionPassword
   ```
   otherwise though we can create those tables, still we cann't get the real 
info that the HMS stores, as it goes to the embedded derby to when querying the 
table.



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