Worked on enhancing the sqlglot repository by improving the stability of its SQL canonicalization pipeline, specifically addressing edge cases in DateDiff argument handling. Applied backend development and data processing skills using Python and SQL to fix a crash that occurred when type information was missing. The solution involved introducing checks for None values in the _coerce_datediff_args function, mirroring safe patterns from related helpers to ensure untyped arguments default to a DATETIME cast. This update reduced runtime failures for downstream consumers relying on translated SQL, maintained code quality, and ensured consistent performance without introducing unnecessary complexity or deviating from existing architecture.