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DB_E_BADSTORAGEFLAG
Meaning
Windows documents DB_E_BADSTORAGEFLAG as “One or more storage flags are not supported”. Here, a storage-mode flag is valid in form but not supported for the bound object or operation.
Relevant OLE DB contract
This result must be interpreted against this contract: OLE DB accessors describe how columns or parameters map to a consumer buffer; an HACCESSOR is object-scoped, reference-counted and inseparable from its DBBINDING layout, bound parts, data types, offsets and ownership rules.
Start with the command or rowset that created the accessor and the consumer buffer passed to the failing method when investigating this result.
Diagnostic sequence
- Capture this result 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: a storage-mode flag is valid in form but not supported for the bound object or operation.
Specific conditions that produce it
- Cause 1: the provider supports stream reads but not writes.
- Cause 2: the requested STGM mode is unavailable for the selected column type.
- Cause 3: the interface requested in DBOBJECT is incompatible with the storage mode.
Evidence to collect before changing the system
- Evidence 1: the DBOBJECT IID and dwFlags values.
- Evidence 2: column type, long-data status and provider storage capabilities.
- Evidence 3: the method and binding ordinal using the storage object.
Corrective actions
- Action 1: select a storage mode the provider documents for that data path.
- Action 2: use consumer-owned buffering when writable storage objects are unsupported.
- Action 3: separate interface negotiation from storage-mode selection.
Retry and recovery policy
Retry rule: retry after changing to a supported storage mode or data-transfer strategy.
Difference from related HRESULT values
This resultS means the flag combination is invalid, while DB_E_BADSTORAGEFLAG means the requested storage mode is not supported in the current contract.
Practical incident
A BLOB binding requests STGM_WRITE from a provider that exposes only read streams; using a read stream and explicit update path avoids it.
Official Microsoft references
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