Doc: Add DELETE ORPHAN-FILES example to Hive page

[ebyhr]

Relates to apache/hive#4897

Tested with apache/hive:4.0.1:

0: jdbc:hive2://localhost:10000/> ALTER TABLE employee EXECUTE DELETE ORPHAN-FILES;
INFO  : Compiling command(queryId=hive_20250101074601_ee489833-e643-4cc9-9c0d-338192d5270f): ALTER TABLE employee EXECUTE DELETE ORPHAN-FILES
INFO  : Semantic Analysis Completed (retrial = false)
INFO  : Created Hive schema: Schema(fieldSchemas:null, properties:null)
INFO  : Completed compiling command(queryId=hive_20250101074601_ee489833-e643-4cc9-9c0d-338192d5270f); Time taken: 0.03 seconds
INFO  : Concurrency mode is disabled, not creating a lock manager
INFO  : Executing command(queryId=hive_20250101074601_ee489833-e643-4cc9-9c0d-338192d5270f): ALTER TABLE employee EXECUTE DELETE ORPHAN-FILES
INFO  : Starting task [Stage-0:DDL] in serial mode
INFO  : Completed executing command(queryId=hive_20250101074601_ee489833-e643-4cc9-9c0d-338192d5270f); Time taken: 0.061 seconds
No rows affected (0.101 seconds)

0: jdbc:hive2://localhost:10000/> ALTER TABLE employee EXECUTE DELETE ORPHAN-FILES OLDER THAN ('2021-12-09 05:39:18.689000000');
INFO  : Compiling command(queryId=hive_20250101075012_80a3545a-8dab-4441-8e02-b572b503ccf3): ALTER TABLE employee EXECUTE DELETE ORPHAN-FILES OLDER THAN ('2021-12-09 05:39:18.689000000')
INFO  : Semantic Analysis Completed (retrial = false)
INFO  : Created Hive schema: Schema(fieldSchemas:null, properties:null)
INFO  : Completed compiling command(queryId=hive_20250101075012_80a3545a-8dab-4441-8e02-b572b503ccf3); Time taken: 0.028 seconds
INFO  : Concurrency mode is disabled, not creating a lock manager
INFO  : Executing command(queryId=hive_20250101075012_80a3545a-8dab-4441-8e02-b572b503ccf3): ALTER TABLE employee EXECUTE DELETE ORPHAN-FILES OLDER THAN ('2021-12-09 05:39:18.689000000')
INFO  : Starting task [Stage-0:DDL] in serial mode
INFO  : Completed executing command(queryId=hive_20250101075012_80a3545a-8dab-4441-8e02-b572b503ccf3); Time taken: 0.044 seconds
No rows affected (0.08 seconds)

[ebyhr]

@pvary Can you take a look at this PR?

[pvary]

@ebyhr: Is it available in Hive 4.0.0? Do we have other maintenance features, like compaction, manifest rewrite, expire snapshot that are available in Hive as well?

[ebyhr]

Is it available in Hive 4.0.0?

Yes. Fix version in https://issues.apache.org/jira/browse/HIVE-27906 is 4.0.0. I confirmed the procedure with docker just in case.

Do we have other maintenance features, like compaction, manifest rewrite, expire snapshot that are available in Hive as well?

The compaction (OPTIMIZE TABLE table REWRITE DATA) and expiring snapshots ALTER TABLE table EXECUTE EXPIRE_SNAPSHOTS(...) are supported. They are already documented. Manifest rewrite is unsupported as far as I know.

[pvary]

Merged to main.
Thanks for the PR @ebyhr!