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Research
I build data systems for the AI era, with research spanning two complementary paths:
Vector search.
I design and evaluate vector search techniques inside modern database systems, with an emphasis on
filtered and filter-agnostic vector search, high-dimensional embedding operators, and indexes that
integrate efficiently with relational query processing and stream processing.
Declarative agentic AI data systems.
I work on declarative abstractions for composing and optimizing LLM/agentic pipelines, treating prompts
and agents as first-class, optimizable operators so that data systems can plan, chain, and adapt
AI-driven workloads automatically.
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Publications
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Credo: Declarative Control of LLM Pipelines via Beliefs and Policies
Duo Lu, Andrew Crotty, Uğur Çetintemel
International Conference on Very Large Data Bases (VLDB), 2026. (Demo Track)
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Declarative Data Services: Structured Agentic Discovery for Composing Data Systems
Shanshan Ye*, Duo Lu*
AI Agents for Discovery in the Wild (AID-WilD)
@ ACM Conference on AI and Agentic System (ACM CAIS), 2026.
* Equal contribution.
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An In-Depth Study of Filter-Agnostic Vector Search on a PostgreSQL Database System
Duo Lu, Helena Caminal, Manos Chatzakis, Yannis Papakonstantinou, Yannis Chronis, Vaibhav Jain, Fatma Ozcan
International Conference on Management of Data (SIGMOD), 2026.
Presentation /
Poster
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Making Prompts First-Class Citizens for Adaptive LLM Pipelines
Uğur Çetintemel, Shu Chen, Alexander W. Lee, Deepti Raghavan, Duo Lu, Andrew Crotty
The Conference on Innovative Data Systems Research (CIDR), 2026.
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VectraFlow: Integrating Vectors into Stream Processing
Duo Lu, Siming Feng, Jonathan Zhou, Franco Solleza, Malte Schwarzkopf, Uğur Çetintemel
The Conference on Innovative Data Systems Research (CIDR), 2025.
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Evaluating Persistent Memory Range Indexes: Part Two
Yuliang He, Duo Lu, Kaisong Huang, Tianzheng Wang
International Conference on Very Large Data Bases (VLDB), 2022.
Extended Version /
Slides /
Poster /
Code
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Experience
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Jun 2026 ~ Aug 2026
Student Researcher
Sunnyvale, CA, United States
Google, Systems Research Group (SRG)
Hosts: Helena Caminal, Yannis Chronis, Fatma Özcan
Work on the data search project.
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May 2025 ~ Dec 2025
Student Researcher
Sunnyvale, CA, United States
Google, Systems Research Group (SRG)
Hosts: Helena Caminal, Yannis Chronis, Fatma Özcan
Develop and evaluate filtered vector search indexes.
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May 2022 ~ Aug 2023
Embedded Software Developer
Vancouver, BC, Canada
Fortinet, FortiOS Routing Team
Manager: Henry Xing
Maintained and improved routing protocols such as OSPF and BGP in FortiOS.
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Talks
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Apr 2026
Filtered Vector Search in PostgreSQL
Host: Prof. Jianguo Wang
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Services
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Shadow PC: VLDB 2027
AEC Member: ACM CAIS 2026 (ACM Conference on AI and Agentic Systems)
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Power by Github Pages - Template from jonbarron
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