# enum ChangeHistoryOperation (v202508)

**Service** **PublisherQueryLanguageService** **Dependencies** [ChangeHistoryValue](https://developers.google.com/ad-manager/api/reference/v202508/PublisherQueryLanguageService.ChangeHistoryValue) ▼ **ChangeHistoryOperation**

An operation that was performed on an entity.

*** ** * ** ***

Namespace
:
    `https://www.google.com/apis/ads/publisher/v202508`

| Enumeration | Description |
|---|---|
| `CREATE` |   |
| `UPDATE` |   |
| `DELETE` |   |
| `UNKNOWN` | The value returned if the actual value is not exposed by the requested API version. |