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Learned indices using neural networks have been shown to outperform traditional indices such as B-trees in both query time and memory. However, learning the distribution of a large dataset can be expensive, and updating learned indices is…

Databases · Computer Science 2021-02-19 Guanli Liu , Lars Kulik , Xingjun Ma , Jianzhong Qi

Index structures are fundamental for efficient query processing on large-scale datasets. Learned indexes model the indexing process as a prediction problem to overcome the inherent trade-offs of traditional indexes. However, most existing…

Databases · Computer Science 2026-03-31 Yuzhen Chen , Bin Yao

Although deep learning has demonstrated remarkable capability in learning from unstructured data, modern tree-based ensemble models remain superior in extracting relevant information and learning from structured datasets. While several…

Machine Learning · Computer Science 2026-02-05 Yi-Chun Liao , Chieh-Lin Tsai , Yuan-Hao Chang , Camélia Slimani , Jalil Boukhobza , Tei-Wei Kuo

Efficiently querying data on embedded sensor and IoT devices is challenging given the very limited memory and CPU resources. With the increasing volumes of collected data, it is critical to process, filter, and manipulate data on the edge…

Databases · Computer Science 2023-03-07 David Ding , Ivan Carvalho , Ramon Lawrence

A groundswell of recent work has focused on improving data management systems with learned components. Specifically, work on learned index structures has proposed replacing traditional index structures, such as B-trees, with learned models.…

Learned indexes fit machine learning (ML) models to the data and use them to make query operations more time and space-efficient. Recent works propose using learned spatial indexes to improve spatial query performance by optimizing the…

Databases · Computer Science 2024-03-21 Sachith Pai , Michael Mathioudakis , Yanhao Wang

Recent work on "learned indexes" has changed the way we look at the decades-old field of DBMS indexing. The key idea is that indexes can be thought of as "models" that predict the position of a key in a dataset. Indexes can, thus, be…

Efficient indexing is fundamental for multi-dimensional data management and analytics. An emerging tendency is to directly learn the storage layout of multi-dimensional data by simple machine learning models, yielding the concept of Learned…

Databases · Computer Science 2024-05-10 Qiyu Liu , Maocheng Li , Yuxiang Zeng , Yanyan Shen , Lei Chen

Targeting in-memory one-dimensional search keys, we propose a novel DIstribution-driven Learned Index tree (DILI), where a concise and computation-efficient linear regression model is used for each node. An internal node's key range is…

Databases · Computer Science 2023-05-19 Pengfei Li , Hua Lu , Rong Zhu , Bolin Ding , Long Yang , Gang Pan

We design the first learned index that solves the dictionary problem with time and space complexity provably better than classic data structures for hierarchical memories, such as B-trees, and modern learned indexes. We call our solution…

Data Structures and Algorithms · Computer Science 2019-03-12 Giorgio Vinciguerra , Paolo Ferragina , Michele Miccinesi

Continual learning systems face the dual challenge of preventing catastrophic forgetting while maintaining energy efficiency, particularly in resource-constrained environments. This paper introduces Pathway-based Progressive Inference…

Machine Learning · Computer Science 2025-06-24 Suyash Gaurav , Jukka Heikkonen , Jatin Chaudhary

Humans learn adaptively and efficiently throughout their lives. However, incrementally learning tasks causes artificial neural networks to overwrite relevant information learned about older tasks, resulting in 'Catastrophic Forgetting'.…

Machine Learning · Computer Science 2021-02-04 Gobinda Saha , Isha Garg , Aayush Ankit , Kaushik Roy

We introduce a cluster evaluation technique called Tree Index. Our Tree Index algorithm aims at describing the structural information of the clustering rather than the quantitative format of cluster-quality indexes (where the representation…

Machine Learning · Computer Science 2020-03-25 A. H. Beg , Md Zahidul Islam , Vladimir Estivill-Castro

Indexes facilitate efficient querying when the selection predicate is on an indexed key. As a result, when loading data, if we anticipate future selective (point or range) queries, we typically maintain an index that is gradually populated…

Databases · Computer Science 2022-02-10 Aneesh Raman , Subhadeep Sarkar , Matthaios Olma , Manos Athanassoulis

Reinforcement learning has recently been used to enhance index structures, giving rise to reinforcement learning-enhanced spatial indices (RLESIs) that aim to improve query efficiency during index construction. However, their practical…

Databases · Computer Science 2025-12-15 Guanli Liu , Renata Borovica-Gajic , Hai Lan , Zhifeng Bao

Learned indices have been proposed to replace classic index structures like B-Tree with machine learning (ML) models. They require to replace both the indices and query processing algorithms currently deployed by the databases, and such a…

Databases · Computer Science 2021-10-12 Tu Gu , Kaiyu Feng , Gao Cong , Cheng Long , Zheng Wang , Sheng Wang

Index plays an essential role in modern database engines to accelerate the query processing. The new paradigm of "learned index" has significantly changed the way of designing index structures in DBMS. The key insight is that indexes could…

Databases · Computer Science 2021-04-14 Jiacheng Wu , Yong Zhang , Shimin Chen , Jin Wang , Yu Chen , Chunxiao Xing

Tree-based machine learning techniques, such as Decision Trees and Random Forests, are top performers in several domains as they do well with limited training datasets and offer improved interpretability compared to Deep Neural Networks…

Emerging Technologies · Computer Science 2021-10-27 Giacomo Pedretti , Catherine E. Graves , Can Li , Sergey Serebryakov , Xia Sheng , Martin Foltin , Ruibin Mao , John Paul Strachan

Tree-based models have proven to be an effective solution for web ranking as well as other problems in diverse domains. This paper focuses on optimizing the runtime performance of applying such models to make predictions, given an…

Databases · Computer Science 2013-04-29 Nima Asadi , Jimmy Lin , Arjen P. de Vries

Learned indexes have attracted significant research interest due to their ability to offer better space-time trade-offs compared to traditional B+-tree variants. Among various learned indexes, the PGM-Index based on error-bounded piecewise…

Databases · Computer Science 2024-10-02 Qiyu Liu , Siyuan Han , Yanlin Qi , Jingshu Peng , Jin Li , Longlong Lin , Lei Chen