如何在使用Java Bigquery API执行更新操作时检索更新的行数

import com.google.cloud.bigquery.*;

public class BigqueryUpdateExample {
    public static void main(String[] args) {
        String projectId = "your_project_id";
        String datasetId = "your_dataset_id";
        String tableId = "your_table_id";

        BigQuery bigquery = BigQueryOptions.newBuilder().setProjectId(projectId).build().getService();

        // 构建更新语句
        TableId table = TableId.of(datasetId, tableId);
        UpdateTableRequest updateRequest = UpdateTableRequest.newBuilder()
                .setTable(table)
                .setSchema(new TableSchema().setFields(Arrays.asList(
                        Field.of("id", StandardSQLTypeName.INTEGER),
                        Field.of("name", StandardSQLTypeName.STRING),
                        Field.of("age", StandardSQLTypeName.INTEGER)
                )))
                .setUpdateMask(FieldMask.of("name", "age"))
                .setDestinationTable(table)
                .build();

        // 执行更新操作
        UpdateTableResult updateResult = bigquery.updateTable(updateRequest);

        // 获取更新的行数
        long updatedRows = updateResult.getTotalRowsUpdated();
        System.out.println("Updated rows: " + updatedRows);
    }
}