PostgREST v12 has been released with the addition of aggregate functions, allowing users to summarize data by performing calculations across groups of rows directly through the PostgREST API. This feature supports common aggregate functions such as avg(), count(), max(), min(), and sum(), enabling users to easily retrieve aggregated values from their datasets. The new feature is deeply integrated with other PostgREST features, making it easy to use in conjunction with existing functionality. However, due to potential performance risks, the feature is disabled by default and must be enabled after reviewing safeguards and implementing strategies such as using pg_plan_filter_module to prevent denial-of-service attacks or excessive resource usage.