Haozhe Zhang 张浩喆

haozhe.zhang@uzh.ch

I am a postdoctoral researcher at the DaST Group at the University of Zurich. Before that, I was a DPhil student at University of Oxford, supervised by Prof. Dan Olteanu.

I am interested in both theoretical and practical aspects of database systems, with a focus on incremental view maintenance, cardinality estimation, and database theory.


Publications

(* indicates alphabetical author ordering, as is standard in theoretical CS venues)
Conjunctive Queries with Free Access Patterns Under Updates.
* Ahmet Kara, Milos Nikolic, Dan Olteanu, Haozhe Zhang
LMCS Journal 2025.
LpBound: Pessimistic Cardinality Estimation Using Lp-Norms of Degree Sequences. Best Paper Award
Haozhe Zhang, Christoph Mayer, Mahmoud Abo Khamis, Dan Olteanu, Dan Suciu
SIGMOD 2025.
LpBound in Action: Cardinality Estimation with One-Sided Guarantees..
Christoph Mayer, Haozhe Zhang, Mahmoud Abo Khamis, Dan Olteanu, Dan Suciu
SIGMOD 2025. Demo Paper
Tractable Conjunctive Queries over Static and Dynamic Relations.
* Ahmet Kara, Zheng Luo, Milos Nikolic, Dan Olteanu, Haozhe Zhang
ICDT 2025.
F-IVM: Analytics over Relational Databases under Updates.
* Ahmet Kara, Milos Nikolic, Dan Olteanu, Haozhe Zhang
VLDB Journal 2024. Special issue on Machine Learning and Databases
Conjunctive Queries with Free Access Patterns Under Updates.
* Ahmet Kara, Milos Nikolic, Dan Olteanu, Haozhe Zhang
ICDT 2023.
Trade-offs in Static and Dynamic Evaluation of Hierarchical Queries.
* Ahmet Kara, Milos Nikolic, Dan Olteanu, Haozhe Zhang
LMCS Journal 2023.
Evaluation Trade-Offs for Acyclic Conjunctive Queries.
* Ahmet Kara, Milos Nikolic, Dan Olteanu, Haozhe Zhang
CSL 2023.
Machine learning over static and dynamic relational data.
* Ahmet Kara, Milos Nikolic, Dan Olteanu, Haozhe Zhang
DEBS 2021.
F-IVM: Learning over Fast Evolving Relational Data.
Milos Nikolic, Haozhe Zhang, Ahmet Kara, Dan Olteanu
SIGMOD 2020. Demo Paper
Trade-offs in Static and Dynamic Evaluation of Hierarchical Queries.
* Ahmet Kara, Milos Nikolic, Dan Olteanu, Haozhe Zhang
PODS 2020.
Maintaining Triangle Queries under Updates.
* Ahmet Kara, Hung Q. Ngo, Milos Nikolic, Dan Olteanu, Haozhe Zhang
TODS Journal 2020. Special issue of best papers at ICDT 2019
Counting Triangles under Updates in Worst-Case Optimal Time. Best paper award
* Ahmet Kara, Hung Q. Ngo, Milos Nikolic, Dan Olteanu, Haozhe Zhang
ICDT 2019.
Counting Triangles under Updates.
* Ahmet Kara, Hung Q. Ngo, Milos Nikolic, Dan Olteanu, Haozhe Zhang
AMW 2018. Workshop Paper
A State Machine System for Insider Threat Detection.
Haozhe Zhang, Ioannis Agrafiotis, Arnau Erola, Sadie Creese, Michael Goldsmith
GraMSec 2018. Workshop Paper

Teaching

Instructor

Teaching Assistant