# Google BigQuery Storage v1 API - Class BigQueryWrite.BigQueryWriteBase (3.19.0)

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    [BindServiceMethod(typeof(BigQueryWrite), "BindService")]
    public abstract class BigQueryWrite.BigQueryWriteBase

Reference documentation and code samples for the Google BigQuery Storage v1 API class BigQueryWrite.BigQueryWriteBase.

Base class for server-side implementations of BigQueryWrite

## Inheritance

[object](https://learn.microsoft.com/dotnet/api/system.object) \> BigQueryWrite.BigQueryWriteBase

## Inherited Members

[object.GetHashCode()](https://learn.microsoft.com/dotnet/api/system.object.gethashcode) [object.GetType()](https://learn.microsoft.com/dotnet/api/system.object.gettype) [object.MemberwiseClone()](https://learn.microsoft.com/dotnet/api/system.object.memberwiseclone) [object.ToString()](https://learn.microsoft.com/dotnet/api/system.object.tostring)

## Namespace

[Google.Cloud.BigQuery.Storage.V1](https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.BigQuery.Storage.V1/latest/Google.Cloud.BigQuery.Storage.V1)

## Assembly

Google.Cloud.BigQuery.Storage.V1.dll

## Methods

### AppendRows(IAsyncStreamReader\<AppendRowsRequest\>, IServerStreamWriter\<AppendRowsResponse\>, ServerCallContext)

    public virtual Task AppendRows(IAsyncStreamReader<AppendRowsRequest> requestStream, IServerStreamWriter<AppendRowsResponse> responseStream, ServerCallContext context)

Appends data to the given stream.

If `offset` is specified, the `offset` is checked against the end of
stream. The server returns `OUT_OF_RANGE` in `AppendRowsResponse` if an
attempt is made to append to an offset beyond the current end of the stream
or `ALREADY_EXISTS` if user provides an `offset` that has already been
written to. User can retry with adjusted offset within the same RPC
connection. If `offset` is not specified, append happens at the end of the
stream.

The response contains an optional offset at which the append
happened. No offset information will be returned for appends to a
default stream.

Responses are received in the same order in which requests are sent.
There will be one response for each successful inserted request. Responses
may optionally embed error information if the originating AppendRequest was
not successfully processed.

The specifics of when successfully appended data is made visible to the
table are governed by the type of stream:

- For COMMITTED streams (which includes the default stream), data is
  visible immediately upon successful append.

- For BUFFERED streams, data is made visible via a subsequent `FlushRows`
  rpc which advances a cursor to a newer offset in the stream.

- For PENDING streams, data is not made visible until the stream itself is
  finalized (via the `FinalizeWriteStream` rpc), and the stream is explicitly
  committed via the `BatchCommitWriteStreams` rpc.

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `requestStream` | `https://cloud.google.com/dotnet/docs/reference/Grpc.Core/latest/Grpc.Core.IAsyncStreamReader-1.htmlhttps://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.BigQuery.Storage.V1/latest/Google.Cloud.BigQuery.Storage.V1.AppendRowsRequest` Used for reading requests from the client. |
| `responseStream` | `https://cloud.google.com/dotnet/docs/reference/Grpc.Core/latest/Grpc.Core.IServerStreamWriter-1.htmlhttps://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.BigQuery.Storage.V1/latest/Google.Cloud.BigQuery.Storage.V1.AppendRowsResponse` Used for sending responses back to the client. |
| `context` | `https://cloud.google.com/dotnet/docs/reference/Grpc.Core/latest/Grpc.Core.ServerCallContext.html` The context of the server-side call handler being invoked. |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://learn.microsoft.com/dotnet/api/system.threading.tasks.task` | A task indicating completion of the handler. |

### BatchCommitWriteStreams(BatchCommitWriteStreamsRequest, ServerCallContext)

    public virtual Task<BatchCommitWriteStreamsResponse> BatchCommitWriteStreams(BatchCommitWriteStreamsRequest request, ServerCallContext context)

Atomically commits a group of `PENDING` streams that belong to the same
`parent` table.

Streams must be finalized before commit and cannot be committed multiple
times. Once a stream is committed, data in the stream becomes available
for read operations.

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `request` | `https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.BigQuery.Storage.V1/latest/Google.Cloud.BigQuery.Storage.V1.BatchCommitWriteStreamsRequest` The request received from the client. |
| `context` | `https://cloud.google.com/dotnet/docs/reference/Grpc.Core/latest/Grpc.Core.ServerCallContext.html` The context of the server-side call handler being invoked. |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://learn.microsoft.com/dotnet/api/system.threading.tasks.task-1https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.BigQuery.Storage.V1/latest/Google.Cloud.BigQuery.Storage.V1.BatchCommitWriteStreamsResponse` | The response to send back to the client (wrapped by a task). |

### CreateWriteStream(CreateWriteStreamRequest, ServerCallContext)

    public virtual Task<WriteStream> CreateWriteStream(CreateWriteStreamRequest request, ServerCallContext context)

Creates a write stream to the given table.
Additionally, every table has a special stream named '_default'
to which data can be written. This stream doesn't need to be created using
CreateWriteStream. It is a stream that can be used simultaneously by any
number of clients. Data written to this stream is considered committed as
soon as an acknowledgement is received.

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `request` | `https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.BigQuery.Storage.V1/latest/Google.Cloud.BigQuery.Storage.V1.CreateWriteStreamRequest` The request received from the client. |
| `context` | `https://cloud.google.com/dotnet/docs/reference/Grpc.Core/latest/Grpc.Core.ServerCallContext.html` The context of the server-side call handler being invoked. |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://learn.microsoft.com/dotnet/api/system.threading.tasks.task-1https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.BigQuery.Storage.V1/latest/Google.Cloud.BigQuery.Storage.V1.WriteStream` | The response to send back to the client (wrapped by a task). |

### FinalizeWriteStream(FinalizeWriteStreamRequest, ServerCallContext)

    public virtual Task<FinalizeWriteStreamResponse> FinalizeWriteStream(FinalizeWriteStreamRequest request, ServerCallContext context)

Finalize a write stream so that no new data can be appended to the
stream. Finalize is not supported on the '_default' stream.

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `request` | `https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.BigQuery.Storage.V1/latest/Google.Cloud.BigQuery.Storage.V1.FinalizeWriteStreamRequest` The request received from the client. |
| `context` | `https://cloud.google.com/dotnet/docs/reference/Grpc.Core/latest/Grpc.Core.ServerCallContext.html` The context of the server-side call handler being invoked. |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://learn.microsoft.com/dotnet/api/system.threading.tasks.task-1https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.BigQuery.Storage.V1/latest/Google.Cloud.BigQuery.Storage.V1.FinalizeWriteStreamResponse` | The response to send back to the client (wrapped by a task). |

### FlushRows(FlushRowsRequest, ServerCallContext)

    public virtual Task<FlushRowsResponse> FlushRows(FlushRowsRequest request, ServerCallContext context)

Flushes rows to a BUFFERED stream.

If users are appending rows to BUFFERED stream, flush operation is
required in order for the rows to become available for reading. A
Flush operation flushes up to any previously flushed offset in a BUFFERED
stream, to the offset specified in the request.

Flush is not supported on the _default stream, since it is not BUFFERED.

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `request` | `https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.BigQuery.Storage.V1/latest/Google.Cloud.BigQuery.Storage.V1.FlushRowsRequest` The request received from the client. |
| `context` | `https://cloud.google.com/dotnet/docs/reference/Grpc.Core/latest/Grpc.Core.ServerCallContext.html` The context of the server-side call handler being invoked. |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://learn.microsoft.com/dotnet/api/system.threading.tasks.task-1https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.BigQuery.Storage.V1/latest/Google.Cloud.BigQuery.Storage.V1.FlushRowsResponse` | The response to send back to the client (wrapped by a task). |

### GetWriteStream(GetWriteStreamRequest, ServerCallContext)

    public virtual Task<WriteStream> GetWriteStream(GetWriteStreamRequest request, ServerCallContext context)

Gets information about a write stream.

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `request` | `https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.BigQuery.Storage.V1/latest/Google.Cloud.BigQuery.Storage.V1.GetWriteStreamRequest` The request received from the client. |
| `context` | `https://cloud.google.com/dotnet/docs/reference/Grpc.Core/latest/Grpc.Core.ServerCallContext.html` The context of the server-side call handler being invoked. |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://learn.microsoft.com/dotnet/api/system.threading.tasks.task-1https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.BigQuery.Storage.V1/latest/Google.Cloud.BigQuery.Storage.V1.WriteStream` | The response to send back to the client (wrapped by a task). |