Group

Mon, 01 Jan 0001 00:00:00 +0000

I will join the College of Computing and Data Science at NTU in November 2026 and will start a new group there. I am recruiting PhD students, research interns, and postdoctoral researchers for 2027. If you are interested in my work and would like to explore related research questions, I would be glad to hear from you.

My current research is described on the home page. These topics are starting points rather than fixed boundaries, and the group’s interests will broaden as it develops.

Publications

Mon, 01 Jan 0001 00:00:00 +0000

* indicates alphabetical author order, as customary in theoretical computer science venues.

The Role of Semirings in Incremental View Maintenance. [arxiv]

* Eden Chmielewski, Andrei Draghici, Dan Olteanu, Haozhe Zhang

arXiv preprint 2026.

CorrBound: Cardinality Estimation Accounting for Inter- and Intra-relation Correlations. [paper]

Christoph Mayer, Haozhe Zhang, Mahmoud Abo Khamis, Kyle Deeds, Dan Olteanu, Dan Suciu

SIGMOD 2026.

Conjunctive Queries with Free Access Patterns Under Updates. [paper, arxiv]

* Ahmet Kara, Milos Nikolic, Dan Olteanu, Haozhe Zhang

LMCS Journal 2025. Invited journal version of ICDT 2023 paper

LpBound: Pessimistic Cardinality Estimation Using Lp-Norms of Degree Sequences. [arxiv, code, video, website, results reproduced]

Haozhe Zhang, Christoph Mayer, Mahmoud Abo Khamis, Dan Olteanu, Dan Suciu

SIGMOD 2025. Best Paper Award

LpBound in Action: Cardinality Estimation with One-Sided Guarantees. [paper, video]

Christoph Mayer, Haozhe Zhang, Mahmoud Abo Khamis, Dan Olteanu, Dan Suciu

SIGMOD 2025. Demo Paper

Tractable Conjunctive Queries over Static and Dynamic Relations. [paper, slides]

* Ahmet Kara, Zheng Luo, Milos Nikolic, Dan Olteanu, Haozhe Zhang

ICDT 2025. Invited to TODS

F-IVM: Analytics over Relational Databases under Updates. [arxiv]

* 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. [paper, slides]

* Ahmet Kara, Milos Nikolic, Dan Olteanu, Haozhe Zhang

ICDT 2023. Invited to LMCS Journal

Trade-offs in Static and Dynamic Evaluation of Hierarchical Queries. [paper, arxiv]

* Ahmet Kara, Milos Nikolic, Dan Olteanu, Haozhe Zhang

LMCS Journal 2023.

Evaluation Trade-Offs for Acyclic Conjunctive Queries. [paper]

* Ahmet Kara, Milos Nikolic, Dan Olteanu, Haozhe Zhang

CSL 2023.

Machine learning over static and dynamic relational data. [paper, arxiv]

* Ahmet Kara, Milos Nikolic, Dan Olteanu, Haozhe Zhang

DEBS 2021.

F-IVM: Learning over Fast Evolving Relational Data. [paper, arxiv]

Milos Nikolic, Haozhe Zhang, Ahmet Kara, Dan Olteanu

SIGMOD 2020. Demo Paper

Trade-offs in Static and Dynamic Evaluation of Hierarchical Queries. [paper, arxiv, slides]

* Ahmet Kara, Milos Nikolic, Dan Olteanu, Haozhe Zhang

PODS 2020.

Maintaining Triangle Queries under Updates. [paper, arxiv]

* 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. [paper, arxiv, slides]

* Ahmet Kara, Hung Q. Ngo, Milos Nikolic, Dan Olteanu, Haozhe Zhang

ICDT 2019. Best paper award

Counting Triangles under Updates. [paper]

* Ahmet Kara, Hung Q. Ngo, Milos Nikolic, Dan Olteanu, Haozhe Zhang

AMW 2018. Workshop Paper

A State Machine System for Insider Threat Detection. [paper]

Haozhe Zhang, Ioannis Agrafiotis, Arnau Erola, Sadie Creese, Michael Goldsmith

GraMSec 2018. Workshop Paper

Haozhe Zhang on Haozhe Zhang 张浩喆

Group

Publications