Function decode

src/expr/src/scalar/func.rs:372–380

(string: &str, format: &str)

#[sqlfunc]
fn decode(string: &str, format: &str) -> Result<Vec<u8>, EvalError> {
    let format = encoding::lookup_format(format)?;
    let out = format.decode(string)?;
    if out.len() > MAX_STRING_FUNC_RESULT_BYTES {
        Err(EvalError::LengthTooLarge)
    } else {
        Ok(out)
    }
}

#[sqlfunc(sqlname = "length", propagates_nulls = true)]
fn encoded_bytes_char_length(a: &[u8], b: &str) -> Result<i32, EvalError> {