What does HRESULT 0x80040E30 (DB_E_BADTYPENAME) mean?

 
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DB_E_INTEGRITYVIOLATION DB_E_ABORTLIMITREACHED

DB_E_BADTYPENAME

Type name is invalid

Exact value and interpretation

DB_E_BADTYPENAME has the unsigned 32-bit value 2147749424 (0x80040E30) and the signed representation -2147217872. AllStat defines the result as “Type name is invalid”. In the concrete failure represented here, a schema-definition or parameter operation receives a provider type name that is invalid.

The high bit is set for DB_E_BADTYPENAME, 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 3632 (0x0E30). Those bit fields place DB_E_BADTYPENAME in an interface-defined family, but they do not reveal the provider, object identity, method, rowset generation or command state that produced it.

OLE DB contract boundary

DB_E_BADTYPENAME must be interpreted against this contract: OLE DB schema contracts combine DBIDs, provider type metadata, column attributes, constraints and locale rules; current provider metadata is authoritative; cached ordinals or type assumptions can become invalid after a schema or command change.

Start with the table, column, parameter or schema object named by the failing definition or data operation when investigating DB_E_BADTYPENAME. Preserve DB_E_BADTYPENAME 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.

Diagnostic sequence

  1. Capture DB_E_BADTYPENAME immediately at the native OLE DB return and obtain the current OLE DB error object before another COM call replaces thread error information.
  2. Identify the exact stage for DB_E_BADTYPENAME: a schema-definition or parameter operation receives a provider type name that is invalid.
  3. For DB_E_BADTYPENAME, compare the live command, rowset, accessor or schema state with the metadata and properties actually granted by the provider.
  4. For DB_E_BADTYPENAME, 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.
  5. For DB_E_BADTYPENAME, reproduce the issue with the smallest command, rowset or definition operation that preserves the same contract boundary.
  6. For DB_E_BADTYPENAME, apply one evidence-backed correction, then verify that the operation succeeds and does not merely change into a nearby HRESULT.

Specific conditions that produce this result

  • Cause 1 for DB_E_BADTYPENAME: the type name is misspelled or not recognized.
  • Cause 2 for DB_E_BADTYPENAME: a type name from another provider or database dialect is reused.
  • Cause 3 for DB_E_BADTYPENAME: length, precision or modifier text is embedded in a field that expects only the native type name.

Evidence to collect before changing the system

A useful DB_E_BADTYPENAME 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 DB_E_BADTYPENAME involves table names, column values, keys, constraints and provider-specific type declarations, record types, lengths, hashes or redacted identifiers instead of secrets or full business data.

  • Evidence 1 for DB_E_BADTYPENAME: the exact type-name string and associated DBTYPE.
  • Evidence 2 for DB_E_BADTYPENAME: provider literal and type metadata.
  • Evidence 3 for DB_E_BADTYPENAME: the table, column or parameter definition using the name.

Corrective actions

  • Action 1 for DB_E_BADTYPENAME: select a type name reported by the active provider.
  • Action 2 for DB_E_BADTYPENAME: keep provider-specific DDL mappings separate.
  • Action 3 for DB_E_BADTYPENAME: pass precision, scale and size through their dedicated structure fields.

Retry and recovery policy

Retry rule for DB_E_BADTYPENAME: retry after replacing the type name with one valid for the provider. A safe DB_E_BADTYPENAME retry must use a changed input, object generation, provider capability or state transition. If the call returning DB_E_BADTYPENAME could have created, updated, deleted or copied data, determine partial completion before replaying it.

For DB_E_BADTYPENAME, use bounded retries and preserve cancellation. For DB_E_BADTYPENAME, 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_BADTYPE rejects a DBTYPE indicator, while DB_E_BADTYPENAME rejects the provider's textual native type name. Keep these outcomes separate in telemetry and user-facing remediation because DB_E_BADTYPENAME requires a different next action.

Practical incident

A schema tool emits NVARCHAR2 for a provider that supports NVARCHAR under a different native name; provider-specific mapping resolves DB_E_BADTYPENAME. The diagnostic value comes from retaining DB_E_BADTYPENAME together with the failing interface and object state, not from reducing every provider result to “database error”.

Implementation guidance

Code handling DB_E_BADTYPENAME should release OLE DB resources in ownership order, preserve every provider error record, and log granted properties rather than only requested properties. When handling DB_E_BADTYPENAME, handles such as HACCESSOR, HROW, HCHAPTER and provider-specific region tokens must never be treated as portable integers across object lifetimes.

When DB_E_BADTYPENAME 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. For DB_E_BADTYPENAME, do not log passwords, access tokens, complete SQL text or unrestricted row values merely to make the event easier to search.

Official Microsoft references

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