# Threshold Queries in Theory and in the Wild

@article{Bonifati2021ThresholdQI, title={Threshold Queries in Theory and in the Wild}, author={Angela Bonifati and Stefania Dumbrava and G. Fletcher and Jan Hidders and Matthias F. J. Hofer and Wim Martens and Filip Murlak and Joshua Shinavier and Slawomir Staworko and Dominik Tomaszuk}, journal={ArXiv}, year={2021}, volume={abs/2106.15703} }

Threshold queries are an important class of queries that only require computing or counting answers up to a specified threshold value. To the best of our knowledge, threshold queries have been largely disregarded in the research literature, which is surprising considering how common they are in practice. In this paper, we present a deep theoretical analysis of threshold query evaluation and show that thresholds can be used to significantly improve the asymptotic bounds of state-of-the-art query…

## 6 Citations

### Any-k Algorithms for Enumerating Ranked Answers to Conjunctive Queries

- Computer Science, MathematicsArXiv
- 2022

This work develops “ any-k ” algorithms which, without knowing the number of desired answers, push the ranking into joins and avoid materializing the join output earlier than necessary, and unifies into the same framework several solutions from different areas that had been studied in isolation.

### LSQ 2.0: A linked dataset of SPARQL query logs

- Computer ScienceSemantic Web
- 2022

The LSQ dataset is presented, which currently describes 43.95 million executions of 11.56 million unique SPARQL queries extracted from the logs of 27 different endpoints, and the model and vocabulary that it uses to represent these queries in RDF is discussed.

### Representing Paths in Graph Database Pattern Matching

- Computer ScienceArXiv
- 2022

It is shown that, from a computational complexity point of view, PMRs seem especially well-suited for representing results of regular path queries and extensions thereof involving counting, random sampling, unions, and joins.

### The Complexity of Regular Trail and Simple Path Queries on Undirected Graphs

- Mathematics, Computer SciencePODS
- 2022

Using techniques from structural graph theory, ranging from the graph minor theorem to group-labeled graphs, it is established that trail evaluation for simple chain regular expressions is tractable, whereas simple path evaluation is tractability for a large subclass.

### Consistent Subgraph Matching over Large Graphs

- Computer Science2022 IEEE 38th International Conference on Data Engineering (ICDE)
- 2022

It is shown that the satisfiability, im-plication, and validation problems of CGDs are coNP-complete, co NP-complete and NP- Complete, respectively, and that the CSM problem (under any kind of repair) is NP- complete.

### Towards Theory for Real-World Data

- Computer SciencePODS
- 2022

This tutorial aims to provide an overview on several practical studies that have been conducted in the areas of tree- Structured and graph-structured data, with a focus on cases with strong interaction between analysis of the data and fundamental research.

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