# getLoadSubsetDemandKey

# Function: getLoadSubsetDemandKey()

```ts
function getLoadSubsetDemandKey(options): DemandKey | undefined;
```

Defined in: [packages/db/src/query/ir-stable-identity.ts:111](https://github.com/TanStack/db/blob/main/packages/db/src/query/ir-stable-identity.ts#L111)

Returns the exact semantic identity of a loadSubset request.

Abort signals and subscriptions are owners of a request, not part of the
requested data, and therefore do not affect the key. A demand generation
scopes one asynchronous attempt rather than the data it requests. Code that
rejects stale work compares this key alongside its generation; query-db uses
the key alone so equivalent data demands can reuse one cache entry across
generations.

## Parameters

### options

[`LoadSubsetOptions`](../type-aliases/LoadSubsetOptions.md)

## Returns

[`DemandKey`](../type-aliases/DemandKey.md) \| `undefined`