# Class QueryPartition (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 [`QueryPartition`](https://docs.cloud.google.com/cpp/docs/reference/spanner/latest/classgoogle_1_1cloud_1_1spanner_1_1QueryPartition) class is a regular type that represents a single slice of a parallel SQL read.
Instances of [`QueryPartition`](https://docs.cloud.google.com/cpp/docs/reference/spanner/latest/classgoogle_1_1cloud_1_1spanner_1_1QueryPartition) are created by [`Client::PartitionQuery`](https://docs.cloud.google.com/cpp/docs/reference/spanner/latest/classgoogle_1_1cloud_1_1spanner_1_1Client#classgoogle_1_1cloud_1_1spanner_1_1Client_1a4b99fa616d2f417c64621523b06a58cf). Once created, [`QueryPartition`](https://docs.cloud.google.com/cpp/docs/reference/spanner/latest/classgoogle_1_1cloud_1_1spanner_1_1QueryPartition) objects can be serialized, transmitted to separate processes, and used to read data in parallel using [`Client::ExecuteQuery`](https://docs.cloud.google.com/cpp/docs/reference/spanner/latest/classgoogle_1_1cloud_1_1spanner_1_1Client#classgoogle_1_1cloud_1_1spanner_1_1Client_1a8e2afee42f535c0436d9161c54b84179). If `data_boost` is set, those requests will be executed using the independent compute resources of Cloud Spanner Data Boost.

## Constructors

### QueryPartition(QueryPartition const \&)

Copy and move

| **Parameter** ||
|---|---|
| **Name** | **Description** |
|   | `QueryPartition const &` |

### QueryPartition(QueryPartition \&\&)

Copy and move

| **Parameter** ||
|---|---|
| **Name** | **Description** |
|   | `QueryPartition &&` |

### QueryPartition()

Constructs an instance of [`QueryPartition`](https://docs.cloud.google.com/cpp/docs/reference/spanner/latest/classgoogle_1_1cloud_1_1spanner_1_1QueryPartition) that is not associated with any [`SqlStatement`](https://docs.cloud.google.com/cpp/docs/reference/spanner/latest/classgoogle_1_1cloud_1_1spanner_1_1SqlStatement).

## Operators

### operator=(QueryPartition const \&)

Copy and move

| **Parameter** ||
|---|---|
| **Name** | **Description** |
|   | `QueryPartition const &` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `QueryPartition &` |   |

### operator=(QueryPartition \&\&)

Copy and move

| **Parameter** ||
|---|---|
| **Name** | **Description** |
|   | `QueryPartition &&` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `QueryPartition &` |   |

## Functions

### sql_statement() const

Accessor for the [`SqlStatement`](https://docs.cloud.google.com/cpp/docs/reference/spanner/latest/classgoogle_1_1cloud_1_1spanner_1_1SqlStatement) associated with this [`QueryPartition`](https://docs.cloud.google.com/cpp/docs/reference/spanner/latest/classgoogle_1_1cloud_1_1spanner_1_1QueryPartition).

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `SqlStatement const &` |   |