Stencil-Based Just-In-Time Compilation for SQL Expression Evaluation: A Copy-and-Patch Approach
Abstract Just-in-time compilation offers significant performance improvements for database query execution by eliminating interpreter overhead. However, traditional JIT frameworks such as LLVM introduce compilation latencies measured in milliseconds, which fail to amortize for typical OLTP workloads. This article presents a practical implementation of stencil-based JIT compilation for SQL expression evaluation,