Method view_exists

cpp/deeplake_pg/table_storage.hpp:213–216

    }

    inline bool view_exists(Oid view_oid) const noexcept
    {
        return views_.contains(view_oid);
    }

    void add_view(Oid view_oid, const std::string& view_name, const std::string& view_str);
    void erase_view(const std::string& view_name);