Sample-based Distinct Cardinality Estimation for Multiple Attributes in Multi-Dataset Queries

Summary: Introduces MAMD, a stored-sample method for distinct-count estimation over multiple attributes and joined datasets, with or without selections. Demonstrates moderately low error, low storage and compilation cost on TPC-H/IMDB, including scalability. (summarized by gpt-5.6-luna on Jul 24 2026)

Paper ID: 14451
Venue: VLDB
Year: 2026
Pagerank: 5.093636e-05
Overall Rank: 10,515 | 27.86%
DOI: 10.14778/3797919.3797922

Incoming Non-self Citations Over Time

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Authors

1. Mehnaz Tabassum Mahin (University of California Riverside)
2. Michael J. Carey (University of California Irvine)
3. Vassilis J. Tsotras (University of California Riverside)

BibTeX Citation

@article{mahin_vldb26,
        title = {{Sample-based Distinct Cardinality Estimation for Multiple Attributes in Multi-Dataset Queries}},
        author = {Mahin, Mehnaz Tabassum and Carey, Michael J. and Tsotras, Vassilis J.},
        journal = {PVLDB},
        series = {{VLDB} '26},
        volume = {19},
        number = {6},
        pages = {1115--1127},
        doi = {10.14778/3797919.3797922},
        url = {https://doi.org/10.14778/3797919.3797922},
        year = {2026}
}

Incoming Citations (Sorted by Pagerank)

Showing 0 of 0 citing papers.

Rank	Citing Paper	Year	Venue	Pagerank

Outgoing Citations (Sorted by Pagerank)

Showing 26 of 26 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	0.0024089429
9	Online Aggregation	1997	SIGMOD	0.00077458002
18	How Good Are Query Optimizers, Really?	2016	VLDB	0.00059284255
35	Improved Histograms for Selectivity Estimation of Range Predicates	1996	SIGMOD	0.00048481081
54	On Random Sampling over Joins	1999	SIGMOD	0.00040810225
55	Statistical Estimators for Relational Algebra Expressions	1988	PODS	0.00040746149
75	Sampling-Based Estimation of the Number of Distinct Values of an Attribute	1995	VLDB	0.00037277061
89	On the Propagation of Errors in the Size of Join Results	1991	SIGMOD	0.00035031529
178	Processing Aggregate Relational Queries with Hard Time Constraints	1989	SIGMOD	0.00026881845
255	Distinct Sampling for Highly-Accurate Answers to Distinct Values Queries and Event Reports	2001	VLDB	0.00023174541
288	Towards Estimation Error Guarantees for Distinct Values	2000	PODS	0.00022296371
378	Bao: Making Learned Query Optimization Practical	2021	SIGMOD	0.00019638121
553	Congressional Samples for Approximate Answering of Group-By Queries	2000	SIGMOD	0.00016590619
697	Selectivity Estimation for Range Predicates using Lightweight Models	2019	VLDB	0.00014888851
802	Random Sampling over Joins Revisited	2018	SIGMOD	0.00013907725
1,061	Are We Ready For Learned Cardinality Estimation?	2021	VLDB	0.00012369764
1,241	Balsa: Learning a Query Optimizer Without Expert Demonstrations	2022	SIGMOD	0.00011521639
1,516	Cardinality Estimation: An Experimental Survey	2018	VLDB	0.00010520885
1,832	DSB: A Decision Support Benchmark for Workload-Driven and Traditional Database Systems	2021	VLDB	9.6607418e-05
1,876	Flow-Loss: Learning Cardinality Estimates That Matter	2021	VLDB	9.5717543e-05
2,762	Cost-based or Learning-based? A Hybrid Query Optimizer for Query Plan Selection	2022	VLDB	8.1539867e-05
3,215	Every Row Counts: Combining Sketches and Sampling for Accurate Group-By Result Estimates	2019	CIDR	7.6324234e-05
3,453	On Join Sampling and the Hardness of Combinatorial Output-Sensitive Join Algorithms	2023	PODS	7.4004131e-05
5,712	Sample-Efficient Cardinality Estimation Using Geometric Deep Learning	2024	VLDB	6.1123894e-05
6,088	How Good are Learned Cost Models, Really? Insights from Query Optimization Tasks	2025	SIGMOD	5.9813965e-05
9,971	Athena: An Effective Learning-based Framework for Query Optimizer Performance Improvement	2025	SIGMOD	5.1845938e-05

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