Airlift Bytecode

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May 31, 2022 · Databases

Exploring Presto SQL Engine (3) - Implementing WHERE Condition Filtering with Antlr and Dynamic Code Generation

The third article in the Presto SQL Engine series demonstrates how to implement WHERE‑clause filtering with Antlr, contrasting a direct AST‑traversal visitor approach—hampered by branch prediction and JVM inlining issues—with runtime bytecode generation using airlift.bytecode, which yields roughly three‑fold speed gains but adds complexity.