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Cost-Based Variable-Length-Gram Selection for String Collections to Support Approximate Queries Efficiently

Summary: Cost-based selection of variable-length grams for approximate string queries with VGRAM-style indexing. Dynamic programming yields tight lower bounds on shared grams and enables automatic gram discovery for workloads, linking gram choice to index structure and performance. (summarized by gpt-5-nano on Feb 09 2026)

Paper ID
4000
Venue
SIGMOD
Year
2008
Pagerank
9.3178557e-05
Overall Rank
2,193 | 84.75%
DOI
-

Incoming Non-self Citations Over Time

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Incoming Citations (Sorted by Pagerank)

Showing 17 of 17 citing papers.

Rank Citing Paper Year Venue Pagerank
1,944 WHAM: A High-throughput Sequence Alignment Method 2011 SIGMOD 0.00010004608
3,578 Efficient Approximate Entity Extraction with Edit Distance Constraints 2009 SIGMOD 6.9503858e-05
3,774 Efficient Exact Edit Similarity Query Processing with the Asymmetric Signature Scheme 2011 SIGMOD 6.7757301e-05
4,359 Astrid: Accurate Selectivity Estimation for String Predicates using Deep Learning 2021 VLDB 6.2569955e-05
4,988 Incremental Maintenance of Length Normalized Indexes for Approximate String Matching 2009 SIGMOD 5.783959e-05
5,291 Fast Subtrajectory Similarity Search in Road Networks under Weighted Edit Distance Constraints 2020 VLDB 5.5826473e-05
5,812 Reference-Based Alignment in Large Sequence Databases 2009 VLDB 5.3172025e-05
5,887 Efficient Approximate Search on String Collections (Tutorial) 2009 VLDB 5.2879769e-05
6,074 Pigeonring: A Principle for Faster Thresholded Similarity Search 2019 VLDB 5.2242306e-05
6,983 A Generic Framework for Efficient and Effective Subsequence Retrieval 2012 VLDB 4.8732757e-05
9,439 On-the-Fly Token Similarity Joins in Relational Databases 2014 SIGMOD 4.3423824e-05
9,932 Local Filtering: Improving the Performance of Approximate Queries on String Collections 2015 SIGMOD 4.2500258e-05
9,933 Efficient and Effective KNN Sequence Search with Approximate n-grams 2014 VLDB 4.2500258e-05
10,216 The Case For Language Model Approximated LIKE Predicate 2026 SIGMOD 4.1945683e-05
11,724 ZigZag: Supporting Similarity Queries on Vector Space Models 2018 SIGMOD 4.1945683e-05
12,049 LinkIT: Privacy Preserving Record Linkage and Integration via Transformations 2013 SIGMOD 4.1945683e-05
12,247 SimDB: A Similarity-aware Database System 2010 SIGMOD 4.1945683e-05
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Outgoing Citations (Sorted by Pagerank)

Showing 10 of 10 cited papers.

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

Rank Cited Paper Year Venue Pagerank
125 Approximate String Joins in a Database (Almost) for Free 2001 VLDB 0.00044847972
155 Robust and Efficient Fuzzy Match for Online Data Cleaning 2003 SIGMOD 0.00040637896
250 Efficient set joins on similarity predicates 2004 SIGMOD 0.00030661988
322 Record Linkage: Similarity Measures and Algorithms 2006 SIGMOD 0.00027518768
1,146 Estimating Alphanumeric Selectivity in the Presence of Wildcards 1996 SIGMOD 0.00013679782
1,202 VGRAM: Improving Performance of Approximate Queries on String Collections Using Variable-Length Grams 2007 VLDB 0.00013326298
1,379 Substring Selectivity Estimation 1999 PODS 0.00012286879
2,213 n-Gram/2L: A Space and Time Efficient Two-Level n-Gram Inverted Index Structure 2005 VLDB 9.2765152e-05
3,226 Extending Q-Grams to Estimate Selectivity of String Matching with Low Edit Distance 2007 VLDB 7.3433307e-05
4,438 Selectivity Estimation for Fuzzy String Predicates in Large Data Sets 2005 VLDB 6.1898903e-05
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1,202 VGRAM: Improving Performance of Approximate Queries on String Collections Using Variable-Length Grams 2007 VLDB 0.00013326298