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DB_E_RESOURCEEXISTS
Meaning
Windows documents DB_E_RESOURCEEXISTS as “Object cannot be created at this URL because an object named by this URL already exists”. In this case, creation at a URL fails because an object already exists at the resolved resource name.
Relevant contract
The OLE DB binder model maps URLs to row, rowset, stream or collection objects. URL scope, requested object type, bind flags, asynchronous capability, locks and server reachability are independent parts of the binding contract.
Investigation of this result should start with the binder or session, normalized URL, requested GUID/object type and DBBINDURLSTATUS result.
Conditions that specifically lead to the result
- Cause 1: the caller repeats a create request.
- Cause 2: another process won a concurrent create race.
- Cause 3: normalization maps two apparent names to the same URL.
Evidence to collect
When recording diagnostic data involving URLs containing credentials, tenant paths and remote object names, use types, lengths, hashes or redacted identifiers rather than secrets or complete business data.
- Evidence 1: normalized target URL.
- Evidence 2: existing object type and generation.
- Evidence 3: creation correlation IDs and idempotency key.
Diagnostic sequence
- Identify the exact failing stage: creation at a URL fails because an object already exists at the resolved resource name.
Corrective actions
- Action 1: adopt explicit create-new, replace or open-existing semantics.
- Action 2: make concurrent creation race-safe.
- Action 3: verify the existing object before treating the result as success.
Retry and recovery
Retry rule: retry only with a different URL or after intentionally removing or replacing the existing object.
Practical scenario
Two import workers create the same destination row; an idempotency key lets the loser verify and reuse the existing object.
Difference from nearby HRESULT values
DB_E_DUPLICATEID is a DBID namespace collision, while DB_E_RESOURCEEXISTS is creation collision at a binder URL.
Official Microsoft references
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