dengzhhu653 commented on code in PR #5629:
URL: https://github.com/apache/hive/pull/5629#discussion_r1948430664
##########
packaging/src/docker/README.md:
##########
@@ -210,3 +210,61 @@ docker compose down
select count(distinct a) from hive_example;
select sum(b) from hive_example;
```
+
+#### `sys` Schema and `information_schema` Schema
+
+`Hive Schema Tool` is located in the Docker Image at
`/opt/hive/bin/schematool`.
+
+By default, system schemas such as `information_schema` for HiveServer2 are
not created.
+To create system schemas for a HiveServer2 instance,
+users need to configure HiveServer2 to use a remote Hive Metastore Server and
use a database other than embedded Derby for the Hive Metastore Server.
+
+Assuming `Maven` and `Docker CE` are installed, a possible use case is as
follows.
+Create a `compose.yaml` file in the current directory,
+
+```yaml
+services:
+ some-postgres:
+ image: postgres:17.2-bookworm
+ environment:
+ POSTGRES_PASSWORD: "example"
+ metastore-standalone:
+ image: apache/hive:4.0.1
+ depends_on:
+ - some-postgres
+ environment:
+ SERVICE_NAME: metastore
+ DB_DRIVER: postgres
+ SERVICE_OPTS: >-
+ -Djavax.jdo.option.ConnectionDriverName=org.postgresql.Driver
+
-Djavax.jdo.option.ConnectionURL=jdbc:postgresql://some-postgres:5432/postgres
+ -Djavax.jdo.option.ConnectionUserName=postgres
+ -Djavax.jdo.option.ConnectionPassword=example
+ volumes:
+ -
~/.m2/repository/org/postgresql/postgresql/42.7.5/postgresql-42.7.5.jar:/opt/hive/lib/postgres.jar
+ hiveserver2-standalone:
+ image: apache/hive:4.0.1
+ depends_on:
+ - metastore-standalone
+ environment:
+ SERVICE_NAME: hiveserver2
+ IS_RESUME: true
+ SERVICE_OPTS: >-
+ -Djavax.jdo.option.ConnectionDriverName=org.postgresql.Driver
+
-Djavax.jdo.option.ConnectionURL=jdbc:postgresql://some-postgres:5432/postgres
+ -Djavax.jdo.option.ConnectionUserName=postgres
+ -Djavax.jdo.option.ConnectionPassword=example
+ -Dhive.metastore.uris=thrift://metastore-standalone:9083
+ volumes:
+ -
~/.m2/repository/org/postgresql/postgresql/42.7.5/postgresql-42.7.5.jar:/opt/hive/lib/postgres.jar
+```
+
+Then execute the shell command as follows to initialize the system schemas in
HiveServer2.
+
+```shell
+mvn dependency:get -Dartifact=org.postgresql:postgresql:42.7.5
+docker compose up -d
+docker compose exec hiveserver2-standalone /bin/bash
+/opt/hive/bin/schematool -initSchema -dbType hive -metaDbType postgres -url
jdbc:hive2://localhost:10000/default
+exit
+```
Review Comment:
No, the mvn is an example of mounting the external maven jdbc driver to the
docker container, we can use any other ways for this purpose as long as the HMS
or HS2 can access to this driver.
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