Method map_to_sql

datafusion/sql/src/unparser/expr.rs:781–810

(&self, args: &[Expr])

    }

    fn map_to_sql(&self, args: &[Expr]) -> Result<ast::Expr> {
        assert_eq_or_internal_err!(args.len(), 2, "map must have exactly 2 arguments");

        let ast::Expr::Array(Array { elem: keys, .. }) = self.expr_to_sql(&args[0])?
        else {
            return internal_err!(
                "map expects first argument to be an array, but received: {:?}",
                &args[0]
            );
        };

        let ast::Expr::Array(Array { elem: values, .. }) = self.expr_to_sql(&args[1])?
        else {
            return internal_err!(
                "map expects second argument to be an array, but received: {:?}",
                &args[1]
            );
        };

        let entries = keys
            .into_iter()
            .zip(values)
            .map(|(key, value)| ast::MapEntry {
                key: Box::new(key),
                value: Box::new(value),
            })
            .collect();

        Ok(ast::Expr::Map(ast::Map { entries }))
    }

    pub fn sort_to_sql(&self, sort: &Sort) -> Result<ast::OrderByExpr> {
        let Sort {