nebula java client scanVertex 是否支持排序和分页

问答 讨论
1

如题

2

scan不支持排序，支持分页，参考该帖子

3 
import com.vesoft.nebula.client.graph.NebulaClient;
import com.vesoft.nebula.client.graph.exception.ExecuteException;
import com.vesoft.nebula.client.graph.response.ScanResponse;

public class NebulaPaginationExample {
    public static void main(String[] args) {
        NebulaClient nebulaClient = new NebulaClient.Builder()
                .withAddress("127.0.0.1")
                .withPort(9669)
                .withSpace("your_space")
                .build();

        try {
            String startVid = ""; // 初始为空，表示从第一个顶点开始
            int limit = 100; // 每页返回 100 个顶点

            while (true) {
                ScanResponse response = nebulaClient.scanVertex(startVid, limit);
                
                if (!response.isSucceeded()) {
                    System.err.println("Scan failed: " + response.getErrorMessage());
                    break;
                }

                // 处理返回的顶点数据
                response.getVertices().forEach(vertex -> {
                    System.out.println(vertex);
                });

                // 检查是否还有更多顶点
                if (response.getVertices().size() < limit) {
                    System.out.println("No more vertices to scan.");
                    break;
                }

                // 更新 startVid 为当前批次的最后一个顶点 ID
                startVid = response.getVertices().get(response.getVertices().size() - 1).getVid();
            }

        } catch (ExecuteException e) {
            e.printStackTrace();
        } finally {
            nebulaClient.close();
        }
    }
}