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Divo: Learning a Stable and Effective Query Optimizer with a Diverse Workload

Summary: Divo tackles LQO brittleness on highly diverse workloads via template-evolving query generation, a two-phase training pipeline with 100K+ static plan experiences, and a diversity-aware probabilistic loss. The result is a more stable optimizer on PostgreSQL mixed workloads, yielding 1.3x over PG and far outperforming prior LQOs. (summarized by gpt-5-mini on Apr 11 2026)

Paper ID
he656cb5c9108f166
Venue
SIGMOD
Year
2026
Pagerank
4.9769913e-05
Overall Rank
10,644 | 28.46%
DOI
10.1145/3786641
PDF
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Authors

BibTeX Citation

@inproceedings{chen_sigmod26,
        title = {{Divo: Learning a Stable and Effective Query Optimizer with a Diverse Workload}},
        author = {Chen, Tianyi and Gao, Jun and Tu, Yaofeng and Lin, Yang and Xu, Mo and Han, Yinjun},
        series = {{SIGMOD} '26},
        booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
        publisher = {Association for Computing Machinery},
        doi = {10.1145/3786641},
        url = {https://dl.acm.org/doi/10.1145/3786641},
        year = {2026}
}

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Outgoing Citations (Sorted by Pagerank)

Showing 19 of 19 cited papers.

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

Rank Cited Paper Year Venue Pagerank
15 How Good Are Query Optimizers, Really? 2016 VLDB 0.00061067652
144 Neo: A Learned Query Optimizer 2019 VLDB 0.00029090793
361 Bao: Making Learned Query Optimization Practical 2021 SIGMOD 0.00020000855
383 Massive Stochastic Testing of SQL 1998 VLDB 0.00019474868
437 QTune: A Query-Aware Database Tuning System with Deep Reinforcement Learning 2019 VLDB 0.00018310278
981 Cardinality Estimation in DBMS: A Comprehensive Benchmark Evaluation 2022 VLDB 0.00012713454
1,195 Balsa: Learning a Query Optimizer Without Expert Demonstrations 2022 SIGMOD 0.00011574218
1,515 DSB: A Decision Support Benchmark for Workload-Driven and Traditional Database Systems 2021 VLDB 0.00010418766
1,605 SkinnerDB: Regret-Bounded Query Evaluation via Reinforcement Learning 2019 SIGMOD 0.00010095581
1,893 Generating Targeted Queries for Database Testing 2008 SIGMOD 9.4149369e-05
2,209 Lero: A Learning-to-Rank Query Optimizer 2023 VLDB 8.8360101e-05
2,248 QueryFormer: A Tree Transformer Model for Query Plan Representation 2022 VLDB 8.7567205e-05
2,686 Cost-based or Learning-based? A Hybrid Query Optimizer for Query Plan Selection 2022 VLDB 8.1300913e-05
2,720 TPC-DS, Taking Decision Support Benchmarking to the Next Level 2002 SIGMOD 8.0936194e-05
3,479 LOGER: A Learned Optimizer towards Generating Efficient and Robust Query Execution Plans 2023 VLDB 7.2665349e-05
4,485 LearnedSQLGen: Constraint-aware SQL Generation using Reinforcement Learning 2022 SIGMOD 6.5771335e-05
5,236 FASTgres: Making Learned Query Optimizer Hinting Effective 2023 VLDB 6.2153504e-05
5,438 Eraser: Eliminating Performance Regression on Learned Query Optimizer 2024 VLDB 6.1278045e-05
8,638 LIMAO: A Framework for Lifelong Modular Learned Query Optimization 2025 VLDB 5.2965922e-05
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