# Struct ConnectionOptionsTraits (3.7.0-rc)

3.7.0-rc 3.6.0 (latest) 3.5.0 3.4.0 3.3.0 3.2.0 2.48.0-rc 2.47.1 2.46.0 2.45.0 2.44.0 2.43.0 2.42.0 2.41.0 2.40.0 2.39.0 2.38.0 2.37.0 2.36.0 2.35.0 2.34.0 2.33.0 2.32.0 2.31.0 2.30.0 2.29.0 2.28.0 2.27.0 2.26.0 2.25.1 2.24.0 2.23.0 2.22.1 2.21.0 2.20.0 2.19.0 2.18.0 2.17.0 2.16.0 2.15.1 2.14.0 2.13.0 2.12.0 2.11.0 The traits to configure [`ConnectionOptions<T>`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1ConnectionOptions.html) for Cloud Spanner.

> [!WARNING]
> **Deprecated:** Use [`Options`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1Options.html) instead, and set (as needed) [`EndpointOption`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1EndpointOption.html), [`UserAgentProductsOption`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1UserAgentProductsOption.html), or [`GrpcNumChannelsOption`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1GrpcNumChannelsOption.html).

## Functions

### static default_endpoint()

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `std::string` |   |

### static user_agent_prefix()

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `std::string` |   |

### static default_num_channels()

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `int` |   |