# refineAggregatedCalculatedColumnType

Canonical page: https://www.adaptabletools.com/docs/reference/refineaggregatedcalculatedcolumntype

Refines an *aggregated* expression into its 
category. Recognizes leftover `CUMUL` and greenfield `CUMULATIVE` /
`QUANT` / window operators. Used by the v24 migration (which stamps Type
before the leftover-text rewrite) and by .

```ts title="TypeScript"
refineAggregatedCalculatedColumnType: (aggregated: string | undefined | null) => CalculatedColumnType
```