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DB_E_TABLEINUSE
Exact value and interpretation
DB_E_TABLEINUSE has the unsigned 32-bit value 2147749440 (0x80040E40) and the signed representation -2147217856. AllStat defines the result as “Table is in use”. In the concrete failure represented here, a table-definition operation cannot alter or drop a table because it is in active use.
The high bit is set for it, so it is a failure HRESULT rather than a success or informational status. Its facility field is 4 (FACILITY_ITF) and its low code is 3648 (0x0E40). Those bit fields place this result in an interface-defined family, but they do not reveal the provider, object identity, method, rowset generation or command state that produced it.
Evidence to collect before changing the system
A useful this result record includes provider CLSID and version, process architecture, interface and method, COM apartment and thread, object correlation ID, transaction state, and the first preceding HRESULT. When it involves catalog names, schema names, object identifiers and deployment metadata, record types, lengths, hashes or redacted identifiers instead of secrets or full business data.
- Evidence 1 for it: the table DBID and blocking object or session.
- Evidence 2 for it: open rowsets, row handles and commands.
- Evidence 3 for it: transaction and lock diagnostics from the provider.
OLE DB contract boundary
This result must be interpreted against this contract: OLE DB data-definition interfaces operate on provider-scoped table and index DBIDs; existence, identifier validity and active use are separate outcomes, and schema changes must account for open rowsets and transactions.
Start with the session performing the definition operation and the table or index identity resolved by that session when investigating this result. Preserve it before ADO, ATL,.NET, a database abstraction layer or an application exception replaces it with a generic message; the exact interface and method matter because one OLE DB object can expose several contracts with different preconditions.
Specific conditions that produce it
- Cause 1 for it: an open rowset references the table.
- Cause 2 for it: another session holds a transaction or statement using it.
- Cause 3 for it: the local consumer leaked row, command or storage objects tied to the table.
Diagnostic sequence
- Capture it immediately at the native OLE DB return and obtain the current OLE DB error object before another COM call replaces thread error information.
- Identify the exact stage for it: a table-definition operation cannot alter or drop a table because it is in active use.
- compare the live command, rowset, accessor or schema state with the metadata and properties actually granted by the provider.
- inspect per-binding, per-property, per-row or per-record statuses whenever the method supplies them; the aggregate result may not identify the rejected element.
- reproduce the issue with the smallest command, rowset or definition operation that preserves the same contract boundary.
- apply one evidence-backed correction, then verify that the operation succeeds and does not merely change into a nearby HRESULT.
Corrective actions
- Action 1 for it: release local dependent objects deterministically.
- Action 2 for it: coordinate destructive DDL with active sessions.
- Action 3 for it: use maintenance windows or bounded wait policies.
Practical incident
A migration attempts to drop a staging table while its own importer still holds a rowset over it; closing that rowset prevents it. The diagnostic value comes from retaining it together with the failing interface and object state, not from reducing every provider result to “database error”.
Implementation guidance
Code handling it should release OLE DB resources in ownership order, preserve every provider error record, and log granted properties rather than only requested properties. When handling it, handles such as HACCESSOR, HROW, HCHAPTER and provider-specific region tokens must never be treated as portable integers across object lifetimes.
When it crosses an abstraction boundary, attach a stable correlation ID and structured fields for the native HRESULT, provider source, interface IID, method, object generation and operation phase. Do not log passwords, access tokens, complete SQL text or unrestricted row values merely to make the event easier to search.
Retry and recovery policy
Retry rule for it: retry after active use ends and all dependent local objects are released. A safe it retry must use a changed input, object generation, provider capability or state transition. If the call returning it could have created, updated, deleted or copied data, determine partial completion before replaying it.
Use bounded retries and preserve cancellation. Configuration and contract failures should normally fail fast; concurrency, resource or transient state failures may justify retry only after their stated precondition changes.
Difference from related HRESULT values
DB_E_OBJECTOPEN is a general open-object conflict, while it specifically identifies a table blocked by active use. Keep these outcomes separate in telemetry and user-facing remediation because it requires a different next action.
Official Microsoft references
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