SQLFluff

SQLFluff is an open-source SQL linter and formatter designed to improve code quality by enforcing consistent coding standards and detecting potential errors, regardless of the SQL dialect used. Before SQLFluff, static code analysis for SQL was often overlooked, with developers relying on manual reviews to ensure consistency and quality—an inefficient and error-prone process. SQLFluff addresses this gap by providing an automated tool for linting and formatting, making SQL code easier to maintain and fostering better collaboration.

The key advantages of SQLFluff include its high flexibility to adapt to project-specific coding standards and its support for multiple SQL dialects. Its auto-correction feature can speed up development by automatically fixing style and syntax issues.

However, SQLFluff has some limitations. Auto-correction can sometimes introduce changes that break SQL code, especially with complex or non-standard constructs. Additionally, when linting large files or many files at once, the tool can become slow, impacting productivity. The initial configuration may also be challenging, with potential conflicts between rules requiring careful customization.

Theodo’s point of view

We recommend using SQLFluff, as having a linter is essential for maintaining SQL code quality. However, it is important to be aware of its limitations. Use auto-correction carefully, optimize linting for large files, and ensure a well-configured setup to maximize its benefits.