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publications
Efficient Computation of a Near-Maximum Independent Set over Evolving Graphs.
Published in IEEE International Conference on Data Engineering (ICDE)., 2018
Weiguo Zheng, Qichen Wang, Jeffrey Xu Yu, Hong Cheng, and Lei Zou.
Maintaining Acyclic Foreign-Key Joins Under Updates.
Published in ACM SIGMOD International Conference on Management of Data (SIGMOD), 2020
Qichen Wang and Ke Yi.
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Cquirrel: Continuous Query Processing over Acyclic Relational Schemas.
Published in International Conference on Very Large Data Bases (VLDB), 2021
Qichen Wang, Chaoqi Zhang, Danish Alsayed, Ke Yi, Bin Wu, Feifei Li, and Chaoqun Zhan.
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Query running too slow? Rewrite it with Quorion!
Published in International Conference on Very Large Data Bases (VLDB), 2021
Bingnan Chen, Binyang Dai,Qichen Wang, Ke Yi.
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Conjunctive Queries with Comparisons.
Published in ACM SIGMOD International Conference on Management of Data (SIGMOD), 2022
Qichen Wang and Ke Yi.
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Conjunctive Queries with Comparisons. [extended abstract]
Published in SIGMOD Record, 2023
Qichen Wang and Ke Yi.
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Computing the Difference of Conjunctive Queries Efficiently.
Published in ACM SIGMOD International Conference on Management of Data (SIGMOD), 2023
Xiao Hu and Qichen Wang.
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SparkSQL+: Next-generation Query Planning over Spark.
Published in ACM SIGMOD International Conference on Management of Data (SIGMOD), 2023
Binyang Dai, Qichen Wang, and Ke Yi.
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Change Propagation Without Joins.
Published in International Conference on Very Large Data Bases (VLDB), 2023
Qichen Wang, Xiao Hu, Binyang Dai and Ke Yi.
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FedKNN: Secure Federated k-Nearest Neighbor Search.
Published in ACM SIGMOD International Conference on Management of Data (SIGMOD), 2024
Xinyi Zhang, Qichen Wang, Cheng Xu, Yun Peng, and Jianliang Xu.
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Relational Algorithms for Top-k Query Evaluation.
Published in ACM SIGMOD International Conference on Management of Data (SIGMOD), 2024
Qichen Wang, Qiyao Luo and Yilei Wang.
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Effective Clustering on Large Attributed Bipartite Graphs.
Published in ACM SIGKDD Conference on Knowledge Discovery and Data Mining (SIGKDD.), 2024
Renchi Yang, Yidu Wu, Xiaoyang Lin, Qichen Wang, Tsz Nam Chan, Jieming Shi.
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Towards Update-Dependent Analysis of Query Maintenance
Published in ACM Symposium on Principles of Database Systems (PODS), 2025
Xiao Hu and Qichen Wang.
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Yannakakis+: Practical Acyclic Query Evaluation with Theoretical Guarantees
Published in ACM SIGMOD International Conference on Management of Data (SIGMOD), 2025
Qichen Wang, Bingnan Chen, Binyang Dai, Ke Yi, Feifei Li and Liang Lin
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Conjunctive Queries with Comparisons.
Published in ACM Transactions on Database Systems (TODS), 2025
Qichen Wang and Ke Yi.
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Size Bound-Adorned Datalog
Published in ACM Symposium on Principles of Database Systems (PODS), 2026
Christian Fattebert, Zhekai Jiang, Christoph Koch, Reinhard Pichler, Qichen Wang. **
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Towards Update-Dependent Analysis of Query Maintenance
Published in ACM Symposium on Principles of Database Systems (PODS), 2026
Qichen Wang.
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talks
Maintaining Acyclic Foreign-Key Joins under Updates
Published:
You can find the presentation video here.
Cquirrel: continuous query processing over acyclic relational schemas
Published:
You can find the video on Bilibili.
Conjunctive Queries with Comparisons
Published:
You can find the pre-recorded video here.
teaching
COMP5712 Combinatorial Optimization
Teaching Assistant, Hong Kong University of Science and Technology, 1900
Semester: 20S
MSBD5003 Big Data Computing
Teaching Assistant, Hong Kong University of Science and Technology, 1900
Semester: 17F, 18S, 18F, 19S, 19F, 20F, 21F