Dalsu Choi

SELECT * FROM database_researcher
WHERE name = 'Dalsu Choi'
    AND affiliation = 'HUFS'
    AND interests @> ARRAY[
        'Query Optimization',
        'AI for Data Management',
        'Data Management for AI'
    ];
Hankuk University of Foreign Studies
Assistant Professor
Division of Computer Engineering
2026 ~ Present · Yongin, Republic of Korea
SAP Labs Korea
Software Engineer
SQL Optimizer 1 Team in SAP HANA
2023 ~ 2026 · Seoul, Republic of Korea
Query Optimization Result Caches (Materialized Views)
Korea University
PhD in Computer Science & Engineering
2016 ~ 2023 · Seoul, Republic of Korea
Advisor: Yon Dohn Chung
Korea University
BS in Computer Science & Engineering
2009 ~ 2016 · Seoul, Republic of Korea

Publications

2026
Dynamic Query Plan Decision During Query Runtime
Dalsu Choi, Hyejin Kang, Heesik Shin, Ansu Na · SAP Labs Korea
U.S. Patent Application 19/715,041 (Filed: 2026-06-22)
Automatic Result Cache Selection Using Large Language Models
Dalsu Choi, Heesik Shin, Hyejin Kang, Kisung Park, Ansu Na · SAP Labs Korea
U.S. Patent Application 19/662,912 (Filed: 2026-04-29)
2025
Result Cache Refresh Job Management
Dalsu Choi, Heesik Shin, Geonryul Park · SAP Labs Korea
U.S. Patent Application 19/403,861 (Filed: 2025-11-29)
Rule Order Determination for Query Rewrites
Dalsu Choi, Heesik Shin · SAP Labs Korea
U.S. Patent Application 19/343,449 (Filed: 2025-09-29)
2024
Selective Rule Application During Query Optimization
Dalsu Choi, Heesik Shin · SAP Labs Korea
U.S. Patent Application 18/967,068 (Filed: 2024-12-03)
European Patent Application
Automatic Recompilation for Parameterized Queries
Dalsu Choi, Sanghee Lee, Mijin An · SAP Labs Korea
U.S. Patent 12,393,582 (Filed: 2024-01-31 · Granted: 2025-08-19)
China / European / Japan / Korea Patent Application
2023
System and Method for a Self-driving Grid Index
Yon Dohn Chung, Dalsu Choi · Korea University
Korea Patent 10-2690965 (Filed: 2023-01-30 · Granted: 2024-07-29)
2022
ReSKY: Efficient Subarray Skyline Computation in Array Databases
Dalsu Choi, Hyunsik Yoon, Yon Dohn Chung
Distributed and Parallel Databases — Special Issue on SSDBM 2021
2021
Method and Devices for Processing Subarray Skyline Query in Array Database
Yon Dohn Chung, Dalsu Choi · Korea University
Korea Patent 10-2569459 (Filed: 2021-07-19 · Granted: 2023-08-17)
Device and Method for Progressive Top-k Subarray Query Processing in Array Databases
Yon Dohn Chung, Dalsu Choi · Korea University
U.S. Patent 11,657,055 (Filed: 2021-01-08 · Granted: 2023-05-23)
Korea Patent 10-2308667 (Granted: 2021-09-28)
2019

Awards

KU Graduate School Achievement Award
Korea University · 2023
NAVER PhD Fellowship
NAVER · 2023
Outstanding Paper Award
Korea University · 2020

Services

VLDB 2027
Reviewer
VLDB 2026
Demo Track Reviewer Shadow PC

Courses

2026 Fall
Database