Method parse_normalize_expr

src/sql-parser/src/parser.rs:1165–1186

Parse calls to normalize(), which can take the form: - normalize('string') - normalize('string', NFC) - normalize('string', NFD) - normalize('string', NFKC) - normalize('string', NFKD)

(&mut self)

    /// - normalize('string', NFKC)
    /// - normalize('string', NFKD)
    fn parse_normalize_expr(&mut self) -> Result<Expr<Raw>, ParserError> {
        self.expect_token(&Token::LParen)?;
        let expr = self.parse_expr()?;

        let args = if self.consume_token(&Token::Comma) {
            let form = self
                .expect_one_of_keywords(&[NFC, NFD, NFKC, NFKD])?
                .as_str();
            vec![expr, Expr::Value(Value::String(form.to_owned()))]
        } else {
            vec![expr, Expr::Value(Value::String("NFC".to_owned()))]
        };

        self.expect_token(&Token::RParen)?;
        Ok(Expr::Function(Function {
            name: RawItemName::Name(UnresolvedItemName::unqualified(ident!("normalize"))),
            args: FunctionArgs::args(args),
            filter: None,
            over: None,
            distinct: false,
        }))
    }

    /// Parse an INTERVAL literal.
    ///