ST-Raptor: LLM-Powered Semi-Structured Table Question Answering
Summary: ST-Raptor: tree-based LLM QA for semi-structured tables that models complex layouts via a Hierarchical Orthogonal Tree (HO-Tree) and decomposes questions into tree-operation pipelines aligned to table structure. Includes forward/backward verification, releases SSTQA dataset, and outperforms nine baselines by up to 20% in accuracy. (summarized by gpt-5-mini on Feb 11 2026)
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Authors
- 1. Zirui Tang (Shanghai Jiao Tong University)
- 2. Boyu Niu (Shanghai Jiao Tong University)
- 3. Xuanhe Zhou (Shanghai Jiao Tong University)
- 4. Boxiu Li (Shanghai Jiao Tong University)
- 5. Wei Zhou (Shanghai Jiao Tong University)
- 6. Jiannan Wang (Simon Fraser University)
- 7. Guoliang Li (Tsinghua University)
- 8. Xinyi Zhang (Renmin University of China)
- 9. Fan Wu (Shanghai Jiao Tong University)
BibTeX Citation
@inproceedings{tang_sigmod26,
title = {{ST-Raptor: LLM-Powered Semi-Structured Table Question Answering}},
author = {Tang, Zirui and Niu, Boyu and Zhou, Xuanhe and Li, Boxiu and Zhou, Wei and Wang, Jiannan and Li, Guoliang and Zhang, Xinyi and Wu, Fan},
series = {{SIGMOD} '26},
booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
publisher = {Association for Computing Machinery},
doi = {10.1145/3769829},
url = {https://dl.acm.org/doi/10.1145/3769829},
year = {2026}
}Incoming Citations (Sorted by Pagerank)
Showing 1 of 1 citing papers.
| Rank | Citing Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 10,270 | MoDora: Tree-Based Semi-Structured Document Analysis System | 2026 | SIGMOD | 5.093636e-05 |
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Outgoing Citations (Sorted by Pagerank)
Showing 6 of 6 cited papers.
Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.
| Rank | Cited Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 713 | Language Models Enable Simple Systems for Generating Structured Views of Heterogeneous Data Lakes | 2024 | VLDB | 0.00014672521 |
| 1,981 | ReAcTable: Enhancing ReAct for Table Question Answering | 2024 | VLDB | 9.3579557e-05 |
| 2,099 | Table-GPT: Table Fine-tuned GPT for Diverse Table Tasks | 2024 | SIGMOD | 9.1682353e-05 |
| 2,710 | OpenSearch-SQL: Enhancing Text-to-SQL with Dynamic Few-shot and Consistency Alignment | 2025 | SIGMOD | 8.2206448e-05 |
| 6,936 | Reliable Text-to-SQL with Adaptive Abstention | 2025 | SIGMOD | 5.7349543e-05 |
| 7,482 | Table Extraction and Understanding for Scientific and Enterprise Applications | 2020 | VLDB | 5.6078973e-05 |
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