Method first

src/sql-parser/src/ast/defs/expr.rs:1436–1441

The first positional argument, if any (the `*` form has none).

(&self)

    /// The first positional argument, if any (the `*` form has none).
    pub fn first(&self) -> Option<&Expr<T>> {
        match self {
            FunctionArgs::Star => None,
            FunctionArgs::Args { args, .. } => args.first(),
        }
    }

    /// Returns the number of arguments. Star (`*`) is None.
    pub fn len(&self) -> Option<usize> {