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DB_S_UNWANTEDREASON
OLE DB consumer declines notifications for a reason
DB_S_UNWANTEDREASON is HRESULT 265935 (0x00040ECF) from Microsoft OLE DB. AllStat describes this result as “Consumer does not want to receive further notification calls for this reason.” The high-order severity bit is clear, so this is a success result, but it carries more information than plain S_OK.
The notification sink asks the provider not to call it again for the current notification reason.
Where the result is encountered
- This result can appear in rowset change notifications; record the producing interface and method rather than inferring behavior from the symbolic name alone.
- This result can appear in consumers ignoring a specific reason such as row activation or field change; record the producing interface and method rather than inferring behavior from the symbolic name alone.
- It can appear in fine-grained callback filtering; record the producing interface and method rather than inferring behavior from the symbolic name alone.
The same numeric success value can be mishandled when a wrapper exposes only a Boolean. Keep the original HRESULT until the code-specific outputs and state transition have been evaluated.
Diagnostic sequence
- capture the raw HRESULT
0x00040ECFimmediately after the returning method and record whether the caller usedSUCCEEDED,FAILED, equality testing, or exception translation. - Identify the exact owner of it: interface, method, object instance, provider or filter version, thread or apartment, and operation phase.
- Validate the decisive contract boundary for it: the reason code is stable and the consumer retains every notification category required for correctness.
- inspect every output parameter, count, status array, returned interface, or side effect that the method documentation associates with this success-with-information result.
- Compare the observed state before and after it; do not assume that a success severity bit means every optional sub-operation completed.
- reproduce the smallest request with the same object state and then change only the condition identified by the evidence before repeating the operation.
State boundary that must be proved
The central question for it is whether the reason code is stable and the consumer retains every notification category required for correctness. The HRESULT alone confirms neither unrelated work nor the quality of optional outputs.
A reliable interpretation of it names the exact method contract, the object generation, and the outputs that remain valid. This prevents a success-with-information result from being promoted to full success or demoted to a generic error.
Correct handling, retry, and recovery
Suppress only the selected reason and keep essential reasons subscribed. Verify that cached UI or business state is not maintained solely by the disabled callback.
Retry it only when the recorded state can change the documented outcome. Repeating the same call is inappropriate for a stable end marker, cancellation, unsupported format, adjusted property, or partial result whose completed side effects have not been reconciled.
Evidence and telemetry to preserve
- preserve reason, phase, and operation values.
- preserve sink registration.
- preserve callback counts by reason.
- preserve provider version.
- preserve state updates formerly triggered by that reason.
Also record db_s_unwantedreason_operation, db_s_unwantedreason_object, db_s_unwantedreason_state_before, db_s_unwantedreason_state_after, UTC time, process and thread identifiers, and a correlation ID. Keep secrets out of logs while retaining GUIDs, CLSIDs, media subtypes, property IDs, row identities, and hashes needed to distinguish objects.
Difference from nearby HRESULT values
DB_S_UNWANTEDPHASE filters one phase across an event; it filters the reason category itself.
This distinction determines whether the caller should consume partial outputs, stop iteration, wait, reconfigure, notify the user, or perform no error recovery at all.
Developer and administrator guidance
When it crosses process, RPC, scripting, or managed-code boundaries, preserve the unsigned 32-bit value and symbolic name. A signed decimal rendering can obscure that the severity bit indicates success and can lead to incorrect exception or retry behavior.
A support report for it should include decimal 265935, hexadecimal 0x00040ECF, the AllStat meaning, the owning API, and the first detailed status or output that explains why the method did not return ordinary S_OK.
Practical validation scenario
A grid ignores repeated row-activation reasons but still needs row-delete notifications. It returns it only for activation and verifies deletion handling remains intact.
The negative test should preserve the condition that produces it; the recovery test should alter only that condition and verify the final state as well as the HRESULT.
References
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