Cquirrel: Continuous Query Processing over Acyclic Relational Schemas
Summary: Cquirrel is a continuous query engine on Flink for relational schemas with acyclic FK graphs. PK–FK joins on select-project-join-agg queries; real-time deltas on updates; improved multi-way joins, scalability, and fault tolerance over prior CQ engines. (summarized by gpt-5-nano on Feb 09 2026)
Incoming Non-self Citations Over Time
Authors
- 1. Qichen Wang (Hong Kong University of Science and Technology)
- 2. Chaoqi Zhang (Hong Kong University of Science and Technology)
- 3. Danish Alsayed (Hong Kong University of Science and Technology)
- 4. Ke Yi (Hong Kong University of Science and Technology)
- 5. Bin Wu (Alibaba)
- 6. Feifei Li (Alibaba)
- 7. Chaoqun Zhan (Alibaba)
BibTeX Citation
@article{wang_vldb21,
title = {{Cquirrel: Continuous Query Processing over Acyclic Relational Schemas}},
author = {Wang, Qichen and Zhang, Chaoqi and Alsayed, Danish and Yi, Ke and Wu, Bin and Li, Feifei and Zhan, Chaoqun},
journal = {PVLDB},
series = {{VLDB} '21},
volume = {14},
number = {12},
pages = {2667--2670},
doi = {10.14778/3476311.3476315},
url = {https://doi.org/10.14778/3476311.3476315},
year = {2021}
}Incoming Citations (Sorted by Pagerank)
Showing 1 of 1 citing papers.
| Rank | Citing Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 10,749 | AJOSC: Adaptive Join Order Selection for Continuous Queries | 2025 | SIGMOD | 5.093636e-05 |
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Outgoing Citations (Sorted by Pagerank)
Showing 9 of 9 cited papers.
Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.
| Rank | Cited Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 136 | Join Synopses for Approximate Query Answering | 1999 | SIGMOD | 0.00030123303 |
| 438 | DBToaster: Higher-order Delta Processing for Dynamic, Frequently Fresh Views | 2012 | VLDB | 0.00018471721 |
| 643 | Materialized Views In Oracle | 1998 | VLDB | 0.00015372449 |
| 710 | Trill: A High-Performance Incremental Query Processor for Diverse Analytics | 2015 | VLDB | 0.00014715033 |
| 816 | The Dynamic Yannakakis Algorithm: Compact and Efficient Query Processing Under Updates | 2017 | SIGMOD | 0.00013827772 |
| 1,559 | Cloud-Native Database Systems at Alibaba: Opportunities and Challenges | 2019 | VLDB | 0.00010362456 |
| 3,605 | Computation Reuse in Analytics Job Service at Microsoft | 2018 | SIGMOD | 7.2640711e-05 |
| 4,101 | Automated Generation of Materialized Views in Oracle | 2020 | VLDB | 6.9009734e-05 |
| 6,332 | Maintaining Acyclic Foreign-Key Joins under Updates | 2020 | SIGMOD | 5.9107433e-05 |
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| 5 | 7,856 | AJoin: Ad-hoc Stream Joins at Scale | 2020 | VLDB |
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| 7 | 10,590 | Aquila: A High-Concurrency System for Incremental Graph Query | 2026 | VLDB |
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| 9 | 6,762 | SquirrelJoin: Network-Aware Distributed Join Processing with Lazy Partitioning | 2017 | VLDB |
| 10 | 193 | Continuously Adaptive Continuous Queries over Streams | 2002 | SIGMOD |