When RAG Meets Query Planning: Logical Query Trees for Exploratory Reasoning Problems

Summary: PlanRAG casts ambiguous, exploratory natural-language questions as logical query trees, using cost-guided dynamic programming to plan decomposition and execution. Parallel, iterative retrieval and aggregation over the trees outperforms iteration- and graph-based RAG on WikiWeb-ERP. (summarized by gpt-6-luna on Oct 22 2026)

Paper ID: hff67ea3d9f532961
Venue: SIGMOD
Year: 2027
Pagerank: 4.9605343e-05
Overall Rank: 10,416 | 30.19%
DOI: 10.1145/3837131
PDF: Download (CC BY 4.0)

Incoming Non-self Citations Over Time

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Authors

1. Ganlin Xu (Fudan University)
2. Linghao Zhang (Fudan University)
3. Zhitao Yin (Fudan University)
4. Hongda Xi (Fudan University)
5. Chen Yang (Fudan University)
6. Jiaqing Liang (Fudan University)
7. Weijia Lu (United Automotive Electronic Systems)
8. Sihang Jiang (Fudan University)
9. Yanghua Xiao (Fudan University)
10. Deqing Yang (Fudan University)

BibTeX Citation

@inproceedings{xu_sigmod27,
        title = {{When RAG Meets Query Planning: Logical Query Trees for Exploratory Reasoning Problems}},
        author = {Xu, Ganlin and Zhang, Linghao and Yin, Zhitao and Xi, Hongda and Yang, Chen and Liang, Jiaqing and Lu, Weijia and Jiang, Sihang and Xiao, Yanghua and Yang, Deqing},
        series = {{SIGMOD} '27},
        booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
        publisher = {Association for Computing Machinery},
        doi = {10.1145/3837131},
        url = {https://dl.acm.org/doi/10.1145/3837131},
        year = {2027}
}

Incoming Citations (Sorted by Pagerank)

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Rank	Citing Paper	Year	Venue	Pagerank

Outgoing Citations (Sorted by Pagerank)

Showing 4 of 4 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

Rank	Cited Paper	Year	Venue	Pagerank
1	Access Path Selection in a Relational Database Management System	1979	SIGMOD	0.0023948467
259	An Overview of Query Optimization in Relational Systems	1998	PODS	0.00022881075
3,488	LEGO-GraphRAG: Modularizing Graph-based Retrieval-Augmented Generation for Design Space Exploration	2025	VLDB	7.2425679e-05
7,803	RAPID: In-Memory Analytical Query Processing Engine with Extreme Performance per Watt	2018	SIGMOD	5.4329661e-05

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