DuckDB Rewrites SQL Parser Using PEG-Based Architecture in Version 2.0

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DuckDB has introduced a new PEG (Parsing Expression Grammar) based SQL parser in its version 2.0 release, announced on August 20, 2026. The change represents a significant shift in how the database engine processes and interprets SQL queries. PEG-based parsers are known for offering cleaner grammar definitions and more predictable parsing behavior compared to traditional approaches. This architectural update is expected to improve DuckDB's ability to handle complex SQL syntax more reliably. Full technical details are available on the official DuckDB blog.

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