Function parse_join

src/expr-parser/src/parser.rs:436–453

(ctx: CtxRef, input: ParseStream)

    }

    fn parse_join(ctx: CtxRef, input: ParseStream) -> Result {
        let join = input.parse::<kw::Join>()?;

        input.parse::<kw::on>()?;
        input.parse::<syn::Token![=]>()?;
        let inner;
        syn::parenthesized!(inner in input);
        let equivalences = scalar::parse_join_equivalences(&inner)?;

        let parse_inputs = ParseChildren::new(input, join.span().start());
        let inputs = parse_inputs.parse_many(ctx, parse_expr)?;

        Ok(MirRelationExpr::Join {
            inputs,
            equivalences,
            implementation: JoinImplementation::Unimplemented,
        })
    }

    fn parse_distinct(ctx: CtxRef, input: ParseStream) -> Result {
        let reduce = input.parse::<kw::Distinct>()?;