Module func 

Built-in scalar functions.

Aggregate functions (count, sum, …) are handled by the executor, which folds over rows; this module covers the per-row scalar functions. The set is a useful core and grows toward SQLite’s full library (func.c, date.c).

Functions

eval_scalar

Evaluate a scalar function call.

is_aggregate

Names that can be aggregates (used for catalog/name checks).

is_aggregate_call

Whether a specific call is an aggregate. min/max are scalar with 2+ arguments and aggregate with exactly one (or *), matching SQLite.