pub type ForQueryResolver<'a> = dyn Fn(&Statement) -> Result<(Vec<String>, Vec<Vec<Value<'static>>>), TriggerError> + 'a;Expand description
v7.37.20 (20.5) — callback shape the DO-block executor registers
on BodyCtx for FOR-IN-SELECT loops. Runs the supplied SELECT
statement against the engine and returns every row’s values.
v7.39 (read01 round 64) — the COLUMN NAMES ride along now, so the loop can
bind a record variable’s fields (rec.v), not just its first cell.