Method parse_windowless_function

src/sql-parser/src/parser.rs:8546–8557

Parses a function call in a position that only permits "windowless" function syntax (PostgreSQL's `func_expr_windowless`): DISTINCT, FILTER, and OVER are not part of the grammar here, which guarantees the planner's invariant that table functions never carry them.

(&mut self)

    /// FILTER, and OVER are not part of the grammar here, which guarantees
    /// the planner's invariant that table functions never carry them.
    fn parse_windowless_function(&mut self) -> Result<Function<Raw>, ParserError> {
        let name = self.parse_raw_name()?;
        self.expect_token(&Token::LParen)?;
        let args = self.parse_optional_args(false)?;
        Ok(Function {
            name,
            args,
            filter: None,
            over: None,
            distinct: false,
        })
    }

    fn parse_derived_table_factor(
        &mut self,