Ji Sun

Assistant Professor

sunji@tsinghua.edu.cn

Department of Computer Science and Technology

Email: sunji@tsinghua.edu.cn

Education background

Ph.D. of Computer Science & Technology, Tsinghua University, Beijing, China, 2021;

Bachelor of Computer Science & Technology, BUPT, Beijing, China, 2016;

Visiting Scholar：CSAIL, MIT，Boston, USA，2018.

Research Areas

Autonomous Databases

Data+AI

Awards & Honors

China Computer Federation (CCF) Distinguished Dissertation Award (2021)

ACM Sigmod Programming Contest Finalists(2020)

Academic Achievement (Past 5 years)

[1] Song Yu, Shengyuan Lin, Shufeng Gong, Yongqing Xie, Ruicheng Liu, Yijie Zhou, Ji Sun, Yanfeng Zhang, Guoliang Li, Ge Yu. A topology-aware localized update strategy for graph-based ann index. PVLDB 2026

[2] Yuchen Peng, Dingyu Yang, Zhongle Xie, Ji Sun, Lidan Shou, Ke Chen, Gang Chen. SVFusion: A CPU-GPU Co-Processing Architecture for Large-Scale Real-Time Vector Search. PVLDB 2026

[3] Ji Sun, Guoliang Li, Peiyao Zhou, Yihui Ma, Jingzhe Xu, Yuan Li. AgenticData: An Agentic Data Analytics System for Heterogeneous Data. arXiv:2508.05002, 2025

[4] Ji Sun,Guoliang Li, James Pan, Jiang Wang, Yongqing Xie,Ruicheng Liu, Wen Nie. GaussDB-Vector: A Large-Scale Persistent Real-Time Vector Database for LLM Applications. PVLDB 2025.

[5] Hongya Wang, Wenlong Wu, Cong Luo, Aobei Bian, Chunguang Meng, Yishuo Wu, Ji Sun. Boosting Accuracy and Efficiency for Vector Retrieval with Local Scaling Graph. ICDE 2025.

[6] Guoliang Li, Ji Sun, Lijie Xu, Shifu Li, Jiang Wang, Wen Nie. Gaussml: An end-to-end in-database machine learning system. ICDE 2024.

[7] Yue Han, Guoliang Li, Haitao Yuan, Ji Sun. AutoView:An Autonomous Materialized View Management System With Encoder-Reducer. TKDE 2022.

[8] Ji Sun, Jintao Zhang, Zhaoyan Sun, Guoliang Li, Nan Tang. Learned cardinality estimation: A design space exploration and a comparative evaluation. PVLDB 2021.

[9] Ji Sun, Guoliang Li, Nan Tang. Learned Cardinality Estimation for Similarity Queries. SIGMOD Conference 2021.

[10] Guoliang Li, Xuanhe Zhou, Ji Sun, Xiang Yu, Yue Han, Lianyuan Jin, Wenbo Li, Tianqing Wang, Shifu Li. opengauss: An autonomous database system. PVLDB 2021.

[11] Xuanhe Zhou, Lianyuan Jin, Ji Sun, Xinyang Zhao, Xiang Yu, Shifu Li, Tianqing Wang, Kun Li, Luyang Liu. DBMind: A Self-Driving Platform in openGauss. PVLDB 2021.

[12] Yue Han, Guoliang Li, Haitao Yuan, Ji Sun. An autonomous materialized view management system with deep reinforcement learning. ICDE 2021.