Method try_parse_u64

src/sql-parser/src/parser.rs:8722–8726

(parser: &mut Parser)

    /// directly returns an `u64`. It is only meant to be used for internal SQL syntax.
    fn parse_optional_internal_as_of(&mut self) -> Result<Option<u64>, ParserError> {
        fn try_parse_u64(parser: &mut Parser) -> Option<u64> {
            let value = parser.parse_value().ok()?;
            let Value::Number(s) = value else { return None };
            s.parse().ok()
        }

        if self.parse_keywords(&[AS, OF]) {
            match try_parse_u64(self) {