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Query rewrite, which aims to generate more efficient queries by altering a SQL query's structure without changing the query result, has been an important research problem. In order to maintain equivalence between the rewritten query and the…

Databases · Computer Science 2024-04-22 Zhaodonghui Li , Haitao Yuan , Huiming Wang , Gao Cong , Lidong Bing

Query rewrite transforms SQL queries into semantically equivalent forms that run more efficiently. Existing approaches mainly rely on predefined rewrite rules, but they handle a limited subset of queries and can cause performance…

Databases · Computer Science 2026-01-05 Yuyang Song , Hanxu Yan , Jiale Lao , Yibo Wang , Yufei Li , Yuanchun Zhou , Jianguo Wang , Mingjie Tang

Query rewriting is an effective technique for refining poorly written queries before they reach the query optimizer. However, manual rewriting is not scalable, as it is prone to errors and requires deep expertise. Traditional query…

Databases · Computer Science 2025-12-04 Jie Liu , Barzan Mozafari

SQL query rewriting aims to reformulate a query into a more efficient form while preserving equivalence. Most existing methods rely on predefined rewrite rules. However, such rule-based approaches face fundamental limitations: (1) fixed…

Databases · Computer Science 2025-08-18 Dongjie Xu , Yue Cui , Weijie Shi , Qingzhi Ma , Hanghui Guo , Jiaming Li , Yao Zhao , Ruiyuan Zhang , Shimin Di , Jia Zhu , Kai Zheng , Jiajie Xu

The growing complexity of log data in modern software systems has prompted the use of Large Language Models (LLMs) for automated log analysis. Current approaches typically rely on direct supervised fine-tuning (SFT) on log-label pairs.…

Query optimization is a critical task in database systems, focused on determining the most efficient way to execute a query from an enormous set of possible strategies. Traditional approaches rely on heuristic search methods and cost…

Databases · Computer Science 2025-03-11 Zhiming Yao , Haoyang Li , Jing Zhang , Cuiping Li , Hong Chen

When complex SQL queries suffer slow executions despite query optimization, DBAs typically invoke automated query rewriting tools to recommend ``lean'' equivalents that are conducive to faster execution. The rewritings are usually achieved…

Databases · Computer Science 2025-09-03 Sriram Dharwada , Himanshu Devrani , Jayant Haritsa , Harish Doraiswamy

Advanced reasoning capabilities in Large Language Models (LLMs) have caused higher hallucination prevalence; yet most mitigation work focuses on after-the-fact filtering rather than shaping the queries that trigger them. We introduce…

Computation and Language · Computer Science 2025-08-26 Nicole Cho , William Watson , Alec Koppel , Sumitra Ganesh , Manuela Veloso

Large language models (LLMs) can face factual limitations when responding to time-sensitive queries about recent events that arise after their knowledge thresholds in the training corpus. Existing search-augmented approaches fall into two…

Information Retrieval · Computer Science 2025-06-11 Wentao Shi , Yiqing Shen

Efficiently acquiring external knowledge and up-to-date information is essential for effective reasoning and text generation in large language models (LLMs). Prompting advanced LLMs with reasoning capabilities to use search engines during…

Computation and Language · Computer Science 2025-08-07 Bowen Jin , Hansi Zeng , Zhenrui Yue , Jinsung Yoon , Sercan Arik , Dong Wang , Hamed Zamani , Jiawei Han

With this work, we describe the concept of intent-based query rewriting and present a first viable solution. The aim is to allow rewrites to alter the structure and syntactic outcome of an original query while keeping the obtainable…

Databases · Computer Science 2025-11-26 Gianna Lisa Nicolai , Patrick Hansert , Sebastian Michel

Although Large Language Models (LLMs) have demonstrated extraordinary capabilities in many domains, they still have a tendency to hallucinate and generate fictitious responses to user requests. This problem can be alleviated by augmenting…

Information Retrieval · Computer Science 2023-06-09 Jiongnan Liu , Jiajie Jin , Zihan Wang , Jiehan Cheng , Zhicheng Dou , Ji-Rong Wen

Database administrators (DBAs) play an important role in managing, maintaining and optimizing database systems. However, it is hard and tedious for DBAs to manage a large number of databases and give timely response (waiting for hours is…

Databases · Computer Science 2023-12-07 Xuanhe Zhou , Guoliang Li , Zhaoyan Sun , Zhiyuan Liu , Weize Chen , Jianming Wu , Jiesi Liu , Ruohang Feng , Guoyang Zeng

Large Language Models (LLMs) have shown remarkable capabilities in reasoning, exemplified by the success of OpenAI-o1 and DeepSeek-R1. However, integrating reasoning with external search processes remains challenging, especially for complex…

Despite the success of large language models (LLMs) in various natural language processing (NLP) tasks, the stored knowledge in these models may inevitably be incomplete, out-of-date, or incorrect. This motivates the need to utilize…

Computation and Language · Computer Science 2023-01-03 Hangfeng He , Hongming Zhang , Dan Roth

Large language models (LLMs) excel at knowledge-intensive question answering and reasoning, yet their real-world deployment remains constrained by knowledge cutoff, hallucination, and limited interaction modalities. Augmenting LLMs with…

Computation and Language · Computer Science 2025-10-13 Daocheng Fu , Jianbiao Mei , Licheng Wen , Xuemeng Yang , Cheng Yang , Rong Wu , Tao Hu , Siqi Li , Yufan Shen , Xinyu Cai , Pinlong Cai , Botian Shi , Yong Liu , Yu Qiao

The advent of Large Language Models (LLMs) heralds a pivotal shift in online user interactions with information. Traditional Information Retrieval (IR) systems primarily relied on query-document matching, whereas LLMs excel in comprehending…

Information Retrieval · Computer Science 2023-11-22 Samira Ghodratnama , Mehrdad Zakershahrak

The essence of modern e-Commercial search system lies in matching user's intent and available candidates depending on user's query, providing personalized and precise service. However, user's query may be incorrect due to ambiguous input…

Information Retrieval · Computer Science 2025-04-09 Shangyu Chen , Xinyu Jia , Yingfei Zhang , Shuai Zhang , Xiang Li , Wei Lin

Information retrieval systems are crucial for enabling effective access to large document collections. Recent approaches have leveraged Large Language Models (LLMs) to enhance retrieval performance through query augmentation, but often rely…

Information Retrieval · Computer Science 2025-04-15 Pengcheng Jiang , Jiacheng Lin , Lang Cao , Runchu Tian , SeongKu Kang , Zifeng Wang , Jimeng Sun , Jiawei Han

The success of DeepSeek-R1 demonstrates the immense potential of using reinforcement learning (RL) to enhance LLMs' reasoning capabilities. This paper introduces Retrv-R1, the first R1-style MLLM specifically designed for multimodal…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Lanyun Zhu , Deyi Ji , Tianrun Chen , Haiyang Wu , Shiqi Wang
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