# Row_RowAggregation

# Interface: Row\_RowAggregation

Defined in: [features/row-aggregation/rowAggregationFeature.types.ts:303](https://github.com/TanStack/table/blob/main/packages/table-core/src/features/row-aggregation/rowAggregationFeature.types.ts#L303)

Internal per-row cache used while grouped aggregates are evaluated.

## Properties

### \_aggregationValuesCache?

```ts
optional _aggregationValuesCache: Record<string, unknown>;
```

Defined in: [features/row-aggregation/rowAggregationFeature.types.ts:305](https://github.com/TanStack/table/blob/main/packages/table-core/src/features/row-aggregation/rowAggregationFeature.types.ts#L305)

Cached aggregate results keyed by column id; created lazily on grouped rows.