Method parse_case_expr

src/sql-parser/src/parser.rs:945–973

(&mut self)

    }

    fn parse_case_expr(&mut self) -> Result<Expr<Raw>, ParserError> {
        let mut operand = None;
        if !self.parse_keyword(WHEN) {
            operand = Some(Box::new(self.parse_expr()?));
            self.expect_keyword(WHEN)?;
        }
        let mut conditions = vec![];
        let mut results = vec![];
        loop {
            conditions.push(self.parse_expr()?);
            self.expect_keyword(THEN)?;
            results.push(self.parse_expr()?);
            if !self.parse_keyword(WHEN) {
                break;
            }
        }
        let else_result = if self.parse_keyword(ELSE) {
            Some(Box::new(self.parse_expr()?))
        } else {
            None
        };
        self.expect_keyword(END)?;
        Ok(Expr::Case {
            operand,
            conditions,
            results,
            else_result,
        })
    }

    /// Parse a SQL CAST function e.g. `CAST(expr AS FLOAT)`
    fn parse_cast_expr(&mut self) -> Result<Expr<Raw>, ParserError> {