create table sj_server_node
(
    id           bigint unsigned auto_increment comment '主键'
        primary key,
    namespace_id varchar(64)  default '764d604ec6fc45f68cd92514c40e9e1a' not null comment '命名空间id',
    group_name   varchar(64)                                             not null comment '组名称',
    host_id      varchar(64)                                             not null comment '主机id',
    host_ip      varchar(64)                                             not null comment '机器ip',
    host_port    int                                                     not null comment '机器端口',
    expire_at    datetime                                                not null comment '过期时间',
    node_type    tinyint                                                 not null comment '节点类型 1、客户端 2、是服务端',
    ext_attrs    varchar(256) default ''                                 null comment '扩展字段',
    create_dt    datetime     default CURRENT_TIMESTAMP                  not null comment '创建时间',
    update_dt    datetime     default CURRENT_TIMESTAMP                  not null on update CURRENT_TIMESTAMP comment '修改时间',
    constraint uk_host_id_host_ip
        unique (host_id, host_ip)
)
    comment '服务器节点';

create index idx_expire_at_node_type
    on sj_server_node (expire_at, node_type);

create index idx_namespace_id_group_name
    on sj_server_node (namespace_id, group_name);