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Schema linking is a crucial step in Text-to-SQL pipelines. Its goal is to retrieve the relevant tables and columns of a target database for a user's query while disregarding irrelevant ones. However, imperfect schema linking can often…

Computation and Language · Computer Science 2024-08-20 Karime Maamari , Fadhil Abubaker , Daniel Jaroslawicz , Amine Mhedhbi

Text-to-SQL is emerging as a practical interface for real world databases. The dominant paradigm for Text-to-SQL is cross-database or schema-independent, supporting application schemas unseen during training. The schema of a database…

Text-to-SQL, which translates a natural language question into an SQL query, has advanced with in-context learning of Large Language Models (LLMs). However, existing methods show little improvement in performance compared to randomly chosen…

Artificial Intelligence · Computer Science 2025-07-23 Jihyung Lee , Jin-Seop Lee , Jaehoon Lee , YunSeok Choi , Jee-Hyong Lee

With Large Language Models' (LLMs) emergent abilities on code generation tasks, Text-to-SQL has become one of the most popular downstream applications. Despite the strong results of multiple recent LLM-based Text-to-SQL frameworks, the…

Machine Learning · Computer Science 2025-09-09 Dazhi Peng

Schema linking -- the process of aligning natural language questions with database schema elements -- is a critical yet underexplored component of Text-to-SQL systems. While recent methods have focused primarily on improving SQL generation,…

Computation and Language · Computer Science 2026-01-28 Md Mahadi Hasan Nahid , Davood Rafiei , Weiwei Zhang , Yong Zhang

In sophisticated existing Text-to-SQL methods exhibit errors in various proportions, including schema-linking errors (incorrect columns, tables, or extra columns), join errors, nested errors, and group-by errors. Consequently, there is a…

Databases · Computer Science 2024-05-17 Sun Yang , Qiong Su , Zhishuai Li , Ziyue Li , Hangyu Mao , Chenxi Liu , Rui Zhao

The Text-to-SQL task translates natural language questions into SQL queries, enabling intuitive database interaction for non-experts. While recent methods leveraging Large Language Models (LLMs) achieve strong performance, their reliance on…

Computation and Language · Computer Science 2026-01-21 Shengmin Piao , Jieun Lee , Sanghyun Park

Text-to-SQL is a task that converts a natural language question into a structured query language (SQL) to retrieve information from a database. Large language models (LLMs) work well in natural language generation tasks, but they are not…

Computation and Language · Computer Science 2023-09-04 Chunxi Guo , Zhiliang Tian , Jintao Tang , Pancheng Wang , Zhihua Wen , Kang Yang , Ting Wang

Schema linking is a critical bottleneck in applying existing Text-to-SQL models to real-world, large-scale, multi-database environments. Through error analysis, we identify two major challenges in schema linking: (1) Database Retrieval:…

Computation and Language · Computer Science 2025-09-09 Yihan Wang , Peiyu Liu , Xin Yang

For industrial-scale text-to-SQL, supplying the entire database schema to Large Language Models (LLMs) is impractical due to context window limits and irrelevant noise. Schema linking, which filters the schema to a relevant subset, is…

Computation and Language · Computer Science 2025-11-24 Ziyang Wang , Yuanlei Zheng , Zhenbiao Cao , Xiaojin Zhang , Zhongyu Wei , Pei Fu , Zhenbo Luo , Wei Chen , Xiang Bai

Text-to-SQL generation aims to translate natural language questions into SQL statements. In Text-to-SQL based on large language models, schema linking is a widely adopted strategy to streamline the input for LLMs by selecting only relevant…

Computation and Language · Computer Science 2024-11-27 Zhenbiao Cao , Yuanlei Zheng , Zhihao Fan , Xiaojin Zhang , Wei Chen , Xiang Bai

The generalizability to new databases is of vital importance to Text-to-SQL systems which aim to parse human utterances into SQL statements. Existing works achieve this goal by leveraging the exact matching method to identify the lexical…

Computation and Language · Computer Science 2022-08-09 Aiwei Liu , Xuming Hu , Li Lin , Lijie Wen

Text-to-SQL systems enable users to interact with structured databases using natural language, eliminating the need for specialized programming knowledge. In this work, we introduce GEMMA-SQL, a lightweight and efficient text-to-SQL model…

Computation and Language · Computer Science 2025-11-10 Hari Mohan Pandey , Anshul Gupta , Subham Sarkar , Minakshi Tomer , Schneider Johannes , Yan Gong

The text-to-SQL task aims to convert natural language into Structured Query Language (SQL) without bias. Recently, text-to-SQL methods based on large language models (LLMs) have garnered significant attention. The core of mainstream…

Databases · Computer Science 2025-02-25 Zeshun You , Jiebin Yao , Dong Cheng , Zhiwei Wen , Zhiliang Lu , Xianyi Shen

Most modern Text2SQL systems prompt large language models (LLMs) with entire schemas -- mostly column information -- alongside the user's question. While effective on small databases, this approach fails on real-world schemas that exceed…

Databases · Computer Science 2025-12-19 Thanh Dat Hoang , Thanh Tam Nguyen , Thanh Trung Huynh , Hongzhi Yin , Quoc Viet Hung Nguyen

Text-to-SQL prompt strategies based on Large Language Models (LLMs) achieve remarkable performance on well-known benchmarks. However, when applied to real-world databases, their performance is significantly less than for these benchmarks,…

Large language models (LLMs) have shown promise in table Question Answering (Table QA). However, extending these capabilities to multi-table QA remains challenging due to unreliable schema linking across complex tables. Existing methods…

Artificial Intelligence · Computer Science 2025-11-25 Xixi Wang , Miguel Costa , Jordanka Kovaceva , Shuai Wang , Francisco C. Pereira

Text-to-SQL is a crucial task toward developing methods for understanding natural language by computers. Recent neural approaches deliver excellent performance; however, models that are difficult to interpret inhibit future developments.…

Computation and Language · Computer Science 2021-02-04 Yasufumi Taniguchi , Hiroki Nakayama , Kubo Takahiro , Jun Suzuki

Schema linking is a difficult and important step in large-scale Text-to-SQL, where systems must identify a compact yet sufficient schema context from large and ambiguous databases. Existing methods often treat schema linking as…

Computation and Language · Computer Science 2026-05-29 Huawei Zheng , Sen Yang , Zhaorui Yang , Yuhui Zhang , Haozhe Feng , Haoxuan Li , Xuan Yi , Chao Hu , Defeng Xie , Chen Hou , Danqing Huang , Wei Chen , Yingcai Wu , Peng Chen , Dazhen Deng

Despite the success of large language models (LLMs) in Text-to-SQL tasks, open-source LLMs encounter challenges in contextual understanding and response coherence. To tackle these issues, we present \ours, a systematic methodology tailored…

Computation and Language · Computer Science 2024-05-14 Xiaojun Chen , Tianle Wang , Tianhao Qiu , Jianbin Qin , Min Yang
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