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DB_S_MULTIPLECHANGES
OLE DB update affected more than one source row
DB_S_MULTIPLECHANGES is HRESULT 265948 (0x00040EDC) from Microsoft OLE DB. AllStat describes it as “Updating a row caused more than one row to be updated in the data source.” The severity bit indicates a nonfailure result, but the value carries a specific condition that must not be collapsed into plain S_OK.
In the OLE DB provider and consumer contract, this result means that updating a row caused more than one row to be updated in the data source. The application should preserve it until it has validated the exact condition represented by this return value.
Where the status is encountered
- OLE DB command or rowset processing; log the exact method and object state instead of interpreting the constant outside that contract.
- Provider metadata, binding, or update handling; log the exact method and object state instead of interpreting the constant outside that contract.
- Data-access wrappers that reduce HRESULT to a Boolean; log the exact method and object state instead of interpreting the constant outside that contract.
Because it is informational, a language binding may expose it as success and hide the symbolic distinction. Keep the original HRESULT available until the code-specific branch has run.
Evidence and telemetry
- preserve row handle and chapter.
- preserve update predicate or key columns.
- preserve rows-affected value.
- preserve generated values for every changed row.
- preserve transaction and isolation level.
Also record db_s_multiplechanges_operation, db_s_multiplechanges_state_before, db_s_multiplechanges_state_after, UTC time, process and thread identifiers, component version, and a correlation ID. Use redacted telemetry for it, retaining only the stable technical identifiers that distinguish the operation.
What must be true before accepting it
Verify that the application understands that an update intended for one logical row changed multiple rows in the data source and reconciles every resulting row. The documented condition must be demonstrated so it is not mistaken for an unrelated success state.
Any state transition preceding it must be included in rollback, continuation, and retry planning.
Correct handling and recovery
Stop treating the operation as a single-row update. Capture the search predicate, concurrency columns, affected-row count, and provider-generated values; then commit, compensate, or roll back according to the application transaction policy.
Retry it only when a documented input or state has changed. Use the code-specific next action for it; avoid treating all informational HRESULT values as retry signals.
Difference from nearby results
DB_S_TOOMANYCHANGES says the provider cannot retain all change history, whereas it says this update propagated to multiple source rows.
Comparing it with related statuses protects the caller from applying failure recovery to normal state.
Practical scenario
An editable view maps one displayed row to several base-table rows. After the update returns this status, the client refreshes the view and verifies each base row before acknowledging success to the user.
A regression test should reproduce it, assert the relevant outputs and state, then change only the decisive condition and verify the expected neighboring result or ordinary completion.
References
- Microsoft: OLE DB return codes — official Microsoft material used to interpret it.
- Microsoft: OLE DB errors
- Microsoft: HRESULT values
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