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Title |
New Compressed Indices for Multijoins on Graph Databases |
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Authors |
Diego Arroyuelo, Fabrizio Barisione, Antonio Fariña, Adrián Gómez-Brandón, Gonzalo Navarro |
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Publication date |
2026 |
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Abstract |
A recent surprising result in the implementation of worst-case-optimal (WCO) multijoins in graph databases (specifically, basic graph patterns) is that they can be supported on graph representations that take even less space than a plain representation, and orders of magnitude less space than classical indices, while offering comparable performance. In this paper we uncover a wide set of new WCO space-time tradeoffs: we (1) introduce new compact indices that handle multijoins in WCO time, and (2) combine them with new query resolution strategies that offer better times in practice. As a result, we improve the average query times of current compact representations by a factor of up to 13 to produce the first 1000 results, and using twice their space, reduce their total average query time by a factor of 2. Our experiments suggest that there is more room for improvement in terms of generating better query plans for multijoins. |
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Pages |
article 102647 |
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Volume |
137 |
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Journal name |
Information Systems |
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Publisher |
Elsevier Science (Amsterdam, The Netherlands) |
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Reference URL |
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