About me

[Updated on 5th July, 2025]

Hi! I’m Yihao Liu (刘奕好), a fifth-year PhD student at IIIS, Tsinghua University, advised by Huanchen Zhang. I hold a bachelor’s degree from Yuanpei College, Peking University. Download my CV here. Please contact me via yhliu918@gmail.com or the telephone number in my CV. (Notice that liuyihao21@mails.tsinghua.edu.cn is an abandoned email address)

Research Focus

Database Systems: Optimizing modern analytical engines (e.g., DuckDB, Presto). My published work explores co-designing storage and execution for memory-efficient query processing.
LLM Acceleration: Researching inference acceleration for diffusion large language models, working with Biqing Qi. I’m looking for opportunities to build efficient LLM infrastructure.

My personal hobbies include classical music (big fan of Daniel Barenboim and Janine Jansen), singing, and traveling.

Currently practicing Deutsch. Danke für ihre Aufmerksamkeit.

Published Papers

Database Papers

Theme: Co-designing storage and execution for memory-efficient query processing

VLDB ‘25 | Selective Late Materialization in Modern Analytical Databases
Yihao Liu, Shaoxuan Tang, Yulong Hui, Hangrui Zhou, Huanchen Zhang
PDF | Code

SIGMOD ‘24 | LeCo: lightweight compression via learning serial correlations
Yihao Liu, Xinyu Zeng, Huanchen Zhang
PDF | Code

CIDR ‘24 | Cost-Intelligent Data Analytics in the Cloud
Huanchen Zhang, Yihao Liu, Jiaqi Yan
PDF | Code

LLM Papers

Under Revision (EMNLP ‘25) | OkraLong: A Flexible Retrieval-Augmented Framework for Long-Text Question Answering
Yulong Hui, Yihao Liu, Yao Lu, Huanchen Zhang
PDF

Under Review (VLDB ‘26) | Scale-Doc: Scaling LLM-based Predicates over Enormous Documents
Hengrui Zhang*, Yulong Hui*, Yihao Liu, Huanchen Zhang
Code

* means equal contribution