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QUERY_E_INVALIDCATEGORIZE
The categorization plan is invalid
QUERY_E_INVALIDCATEGORIZE is the failure HRESULT 0x80041604 (-2147215868 signed; 2147751428 unsigned). Its severity bit is 1, facility is 4 (FACILITY_ITF), and code is 0x1604. AllStat describes it as “An invalid categorization order was requested.”
Exact contract boundary
This result belongs to legacy Windows query execution and is returned while building grouped or categorized result sets rather than merely ordering individual rows. The exact condition is: a grouping-property, range, aggregate-placement or nesting failure. This stage matters because converting the result to a generic COM failure removes the information needed to choose the owner and retry policy.
This value belongs to the legacy Indexing Service query-execution contract. It can surface through the Indexing Service OLE DB provider or related query interfaces, but it should not be presented as a generic result from every modern Windows Search API. Current Windows Search SQL documentation can clarify related clause concepts, but it does not establish that every current search API returns this legacy query-execution constant.
Input or state defects
- Retrying this result with the same grouping mode leaves the decisive contract violation intact.
- This result can appear when grouped property type disagrees with the state expected while building grouped or categorized result sets rather than merely ordering individual rows.
- a stale or transformed range boundaries can make the component observe that a grouping-property, range, aggregate-placement or nesting failure.
- an incomplete aggregate placement hides the distinction needed to separate this HRESULT from a later catalog or service failure.
- changes in nesting depth between validation and execution can reproduce the result even when the user-visible input looks unchanged.
The strongest hypothesis for this HRESULT must account for the operation—building grouped or categorized result sets rather than merely ordering individual rows—and the documented condition. A failed command or empty rowset is only the visible symptom; it does not identify which restriction, projection, sort, scope, timeout or catalog state violated the query contract.
Incident record
- use grouping mode to test whether the failure belongs to parsing, execution, indexing or capability negotiation.
- preserve grouped property type before objects or work items are released.
- associate range boundaries with the exact UTC timestamp and correlation identifier.
- compare failing and known-good values for aggregate placement under the same provider or handler version.
- record the source and normalization path of nesting depth, not only its display form.
- use provider command text and dialect to test whether the failure belongs to parsing, execution, indexing or capability negotiation.
Evidence for this HRESULT should reflect what the component actually received. Redact private literals if necessary, but keep clause boundaries, canonical properties, parameter types, dialect and parser or provider offsets.
How to isolate the cause
- Capture grouping mode and grouped property type at the call boundary that returns this result.
- confirm the operation reached building grouped or categorized result sets rather than merely ordering individual rows with the intended range boundaries.
- perform the decisive check: test the base query without categorization, then add one supported group level and range set at a time.
- reduce the case until changing aggregate placement alone changes the HRESULT or proves it irrelevant.
- apply the recovery only after verifying nesting depth; preserve the original result for comparison.
A useful control for this HRESULT changes one dimension at a time. Begin with a known-good minimal command against the same catalog and restore projection, restriction, sorting, grouping and scope one component at a time.
Restoration strategy
Reduce the request to a supported grouping contract or move bounded presentation grouping to the client. Retry it only after the responsible input or state changes and the previous operation has completed or been cancelled. Backoff helps only with measured transient load or timeout; it cannot repair invalid clauses, projection metadata, scopes or command state.
Scope of the result
It does not by itself prove catalog corruption, service outage, access denial or absence of matches; the query stage and provider records must identify the failing clause or state. Without code-specific evidence for this HRESULT, the value also cannot identify which wrapper, configuration, handler or service transition introduced the condition.
Comparison with adjacent codes
QUERY_E_INVALIDSORT concerns row order; QPARSE_E_INVALID_GROUPING identifies parser-level grouping type failure. Keep the symbolic HRESULT beside the stage name in telemetry because nearby constants may require different owners, user messages and retry rules despite the same visible symptom.
Developer and administrator guidance
Retain final command text, dialect, catalog generation, parameter values, timeout, cancellation state and chained OLE DB error records. Do not log credentials or unrestricted document content. Before rebuilding the catalog or restarting the provider for this HRESULT, reproduce the minimal command and preserve its chained errors.
Example from a search pipeline
A report places category ordering in the wrong part of a GROUP ON expression. Reconstructing the documented group structure fixes the query. A regression test for this HRESULT should assert the decisive evidence, change only the responsible condition, and include one neighboring HRESULT so future code cannot collapse distinct failures into a generic message.
Official Microsoft references
- Microsoft: Indexing Service query-execution values
- Microsoft: Windows Search grouping syntax
- Microsoft: Windows Search SQL syntax
- Microsoft: OLE DB provider for Indexing Service
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