What does HRESULT 0x00040EC6 (DB_S_ENDOFROWSET) mean?

 
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DB_S_NONEXTROWSET DB_S_COMMANDREEXECUTED

DB_S_ENDOFROWSET

OLE DB reached the rowset or chapter boundary

DB_S_ENDOFROWSET is HRESULT 265926 (0x00040EC6) from Microsoft OLE DB. AllStat describes this result as “Start or end of rowset or chapter was reached.” The high-order severity bit is clear, so this is a success result, but it carries more information than plain S_OK.

The fetch reached the start or end of the rowset or chapter before satisfying the entire requested row count.

Where the result is encountered

  • This result can appear in IRowset::GetNextRows; record the producing interface and method rather than inferring behavior from the symbolic name alone.
  • This result can appear in bookmark-relative fetches; record the producing interface and method rather than inferring behavior from the symbolic name alone.
  • It can appear in forward or backward rowset paging; 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 0x00040EC6 immediately after the returning method and record whether the caller used SUCCEEDED, 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 consumer processes the rows actually obtained and updates its cursor state to the documented boundary.
  • 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 consumer processes the rows actually obtained and updates its cursor state to the documented boundary. 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

Consume returned rows, then stop or reverse direction according to the application. Do not discard a partial final batch merely because the HRESULT differs from S_OK.

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 requested and obtained counts.
  • preserve fetch direction.
  • preserve starting bookmark or offset.
  • preserve rowset chapter.
  • preserve next fetch position and held HROW handles.

Also record db_s_endofrowset_operation, db_s_endofrowset_object, db_s_endofrowset_state_before, db_s_endofrowset_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_ROWLIMITEXCEEDED is an active-row capacity condition; it is a data-position boundary.

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

Tests for it should verify both the encoded condition and the resulting outputs. A test for it that checks only SUCCEEDED cannot detect stale counts, partial streams, adjusted properties, missing callbacks, or other code-specific effects.

A support report for it should include decimal 265926, hexadecimal 0x00040EC6, 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 page requests 100 rows near the end of a result set and receives 17 rows with it. The client displays all 17 and marks the page as final.

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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