Java Companion

Mar 3, 2026 · Backend Development

Simplify MyBatis IN Clauses: Custom Extension Replaces foreach Template and Doubles SQL Writing Efficiency

The article analyzes the cumbersome MyBatis IN‑statement foreach template, explores three implementation paths, and presents a custom LanguageDriver that lets developers write simple "in #{param}" syntax, cutting XML boilerplate in half while generating correct SQL at runtime.