PostgreSQL 19: LLM code review drives record feature reverts

PostgreSQL core team member Peter Eisentraut explained the unusually high number of features reverted from the upcoming PostgreSQL 19 release. LLM-assisted code review surfaced defects in code written before such tools existed, raising the effective quality bar.

• PostgreSQL 19 beta saw an unusually high number of feature reverts
• Some reverts stemmed from architectural defects, others from edge cases
• LLM review produced about 40 defect reports, leaving no time to fix them
• Eisentraut says this is not "vibe coding"; the code predates LLM review