Rows and tables can arrive in a destination while the application still lacks the intended ownership and access arrangements. For a database replacement, data movement and identity migration should therefore have related but separate acceptance records.
PostgreSQL’s export utilities illustrate why this separation matters. A database-specific package should not be interpreted as a complete inventory of everything shared across the source environment. The migration owner needs to identify the global objects that matter and decide how they belong in the destination design.
Establish the documented export boundary
The PostgreSQL 18 pg_dump documentation explains that the utility exports one database rather than cluster-global objects such as roles. Its scope is not a complete identity migration merely because an export file has been produced.
The pg_dumpall documentation identifies global objects including database roles, tablespaces and grants for configuration parameters, which pg_dump does not save. These are distinct object categories, rather than different names for application rows.
This article concerns migration planning. It does not recommend treating a logical export as a universal production-backup design or executing a cluster-wide restore as a routine fix for a missing account.
Map identities to the destination responsibility
Consider a hypothetical reporting application with a service identity and separate administrative ownership. A test that loads tables through a privileged migration identity may show that the records arrived. It does not prove that the reporting service can perform its intended work under the identity it will actually use.
The target might preserve a familiar role arrangement, or the business might approve a revised access design. Either route requires an explicit mapping. Identically spelled role names are not enough to establish that ownership, memberships and permitted actions meet the intended requirement.
The mapping should describe responsibilities without placing passwords or other secrets in an article or a general review sheet. Migration evidence needs to show the approved outcome, not distribute operational credentials to everyone reviewing the project.
Keep the identity inventory alongside the data inventory
The suggested review separates questions that can otherwise disappear behind a completed data-transfer milestone.
| Migration item | Question for the owner | Evidence to retain |
|---|---|---|
| Application identity | Which identity will run the service? | Approved destination mapping |
| Object ownership | Who should control migrated objects? | Reviewed ownership result |
| Allowed work | Can the service perform its required actions? | Representative application checks |
| Restricted work | Are excluded actions still excluded? | Approved negative checks |
The global inventory may contain objects outside this application’s scope. Their presence in the source does not mean every destination should reproduce them. Reviewers should identify the relevant subset and record any deliberate redesign instead of copying everything merely because an export mechanism can describe it.
Test using the identity the application will use
For the reporting example, a useful rehearsal would run representative approved reads through the intended service identity. It would separately check that the identity cannot perform an agreed administrative action outside its role. Both are suggested acceptance checks, rather than claims about an actual application or a universal permission model.
This helps distinguish a genuine access gap from a test performed through the wrong account. A privileged operator’s successful query and the service account’s failure can coexist without contradicting the evidence that the table data was transferred.
Tests should cover important ownership-dependent operations identified by the application team. If a new access design intentionally changes those operations, the project should approve the change and its application effort. It should not label every adjustment a data-loss problem or assume that making the service more privileged is the required solution.
Evaluate OceanBase and PostgreSQL routes explicitly
OceanBase’s product overview presents a distributed relational platform with compatibility directions for modernization. It does not establish that PostgreSQL cluster-global roles or parameter privileges map directly to an OceanBase deployment.
An OceanBase proposal should explain the supported identity and ownership arrangement for the chosen product, version and deployment. A PostgreSQL proposal should likewise address the actual target environment, including which administrative actions its service model permits. The assessment should not assume that every managed environment allows the same cluster-level restoration procedure.
This comparison can recognize different implementations when they satisfy the agreed responsibilities. Its cost assessment should include mapping, application configuration and acceptance work, rather than treating a table export as proof that identity migration has already finished.
Accept data and access as distinct completed outcomes
The handover should identify the relevant source-global objects, their intended destination treatment and the application identities used in the checks. Data reconciliation and access validation should be recorded separately so that neither is used as a substitute for the other.
That produces a clearer replacement decision. OceanBase can be assessed against the proposed service, and PostgreSQL’s utility boundaries remain accurately represented. The complete result is an application operating with the intended authority over its migrated data, rather than a file that contains tables but leaves the identity decision implicit.
This article is based on documented sources and editorial analysis. Proposed evaluation examples are not independently measured benchmark results.