alvarowolfx commented on PR #421:
URL: https://github.com/apache/arrow-go/pull/421#issuecomment-3005699936
This is what I tried with `GetSchemaPayload` and `GetRecordBatchPayload`
(missing some err handling code). I get `Arrow Error: IOError: Invalid
flatbuffers message` from the BigQuery side.
```go
func writeToBQClient(schema *arrow.Schema, records []arrow.Record,
writeStreamName string, appendStream storagepb.BigQueryWrite_AppendRowsClient)
error {
// Serialize schema using IPC format (just the schema, no data)
var err error
var schemaBuf bytes.Buffer
schemaPayload := ipc.GetSchemaPayload(schema, memory.DefaultAllocator)
schemaMd := schemaPayload.Meta()
defer schemaMd.Release()
schemaBuf.Write(schemaMd.Bytes())
schemaPayload.SerializeBody(&schemaBuf)
schemaData := schemaBuf.Bytes()
// Serialize record batch using IPC format
var recordBuf bytes.Buffer
for _, record := range records {
p, err := ipc.GetRecordBatchPayload(record,
ipc.WithSchema(schema))
if err != nil {
slog.Error("failed to write Arrow record", "error", err)
return err
}
m := p.Meta()
defer m.Release()
recordBuf.Write(m.Bytes())
p.SerializeBody(&recordBuf)
}
recordData := recordBuf.Bytes()
slog.Info("Schema IPC data size", "bytes", len(schemaData))
slog.Info("Record IPC data size", "bytes", len(recordData))
request := &storagepb.AppendRowsRequest{
WriteStream: writeStreamName,
Rows: &storagepb.AppendRowsRequest_ArrowRows{
ArrowRows: &storagepb.AppendRowsRequest_ArrowData{
WriterSchema: &storagepb.ArrowSchema{
SerializedSchema: schemaData,
},
Rows: &storagepb.ArrowRecordBatch{
SerializedRecordBatch: recordData,
},
},
},
}
// Send the request
err = appendStream.Send(request)
if err != nil {
slog.Error("failed to send AppendRows request", "error", err)
return err
}
err = appendStream.CloseSend()
if err != nil {
slog.Error("failed to close AppendRows request: %v")
return err
}
return nil
}
```
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