# stream_update_index

> **Function** in `langchain_google_vertexai`

📖 [View in docs](https://reference.langchain.com/python/langchain-google-vertexai/vectorstores/_utils/stream_update_index)

Updates an index using stream updating.

## Signature

```python
stream_update_index(
    index: MatchingEngineIndex,
    data_points: list[meidx_types.IndexDataPoint],
) -> None
```

## Parameters

| Name | Type | Required | Description |
|------|------|----------|-------------|
| `index` | `MatchingEngineIndex` | Yes | Vector search index. |
| `data_points` | `list[meidx_types.IndexDataPoint]` | Yes | List of `IndexDataPoint`. |

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[View source on GitHub](https://github.com/langchain-ai/langchain-google/blob/a3f016b2a6c4af535df275545f76fa7424aa39e5/libs/vertexai/langchain_google_vertexai/vectorstores/_utils.py#L13)