HIVE-28437: Support for initializing system database of Hive-Server 2…

… for Docker Image

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
+```

packaging/src/docker/entrypoint.sh

@@ -31,11 +31,19 @@ function initialize_hive {
   fi
   $HIVE_HOME/bin/schematool -dbType $DB_DRIVER $COMMAND $VERBOSE_MODE
   if [ $? -eq 0 ]; then
-    echo "Initialized schema successfully.."
+    echo "Initialized Hive Metastore Server schema successfully.."
   else
-    echo "Schema initialization failed!"
+    echo "Hive Metastore Server schema initialization failed!"
     exit 1
   fi
+  if [[ "${SERVICE_NAME:-}" == "hiveserver2" ]]; then
+      $HIVE_HOME/bin/schematool $COMMAND -dbType hive -metaDbType $DB_DRIVER -url jdbc:hive2://localhost:10000/default $VERBOSE_MODE
+      if [ $? -ne 0 ]; then
+        echo "Hive-Server 2 schema initialization failed!"
+        exit 1
+      fi
+      echo "Initialized Hive-Server 2 schema successfully.."
+  fi
 }
 
 export HIVE_CONF_DIR=$HIVE_HOME/conf