Function ascii

src/expr/src/scalar/func/impls/string.rs:979–984

(a: &'a str)

#[sqlfunc(sqlname = "ascii")]
fn ascii<'a>(a: &'a str) -> i32 {
    a.chars()
        .next()
        .and_then(|c| i32::try_from(u32::from(c)).ok())
        .unwrap_or(0)
}

#[sqlfunc(sqlname = "char_length")]
fn char_length<'a>(a: &'a str) -> Result<i32, EvalError> {