Method parse_window_frame_bound

src/sql-parser/src/parser.rs:926–943

Parse `CURRENT ROW` or `{ | UNBOUNDED } { PRECEDING | FOLLOWING }`

(&mut self)

    /// Parse `CURRENT ROW` or `{ <positive number> | UNBOUNDED } { PRECEDING | FOLLOWING }`
    fn parse_window_frame_bound(&mut self) -> Result<WindowFrameBound, ParserError> {
        if self.parse_keywords(&[CURRENT, ROW]) {
            Ok(WindowFrameBound::CurrentRow)
        } else {
            let rows = if self.parse_keyword(UNBOUNDED) {
                None
            } else {
                Some(self.parse_literal_uint()?)
            };
            if self.parse_keyword(PRECEDING) {
                Ok(WindowFrameBound::Preceding(rows))
            } else if self.parse_keyword(FOLLOWING) {
                Ok(WindowFrameBound::Following(rows))
            } else {
                self.expected(self.peek_pos(), "PRECEDING or FOLLOWING", self.peek_token())
            }
        }
    }

    fn parse_case_expr(&mut self) -> Result<Expr<Raw>, ParserError> {
        let mut operand = None;