{
  "summary": [
    {
      "name": "pbl_world_state_snapshot",
      "comment": "世界状态快照（掉线补齐/离线兜底）",
      "module": "pbl_runtime_ext",
      "engine": "mariadb",
      "charset": "utf8mb4",
      "tenant_scoped": true
    }
  ],
  "fields": [
    {
      "name": "tenant_id",
      "comment": "租户ID(强制打头)",
      "null": false,
      "type": "str",
      "length": 32
    },
    {
      "name": "id",
      "comment": "主键",
      "null": false,
      "type": "int",
      "length": 20,
      "unsigned": true,
      "auto_increment": true
    },
    {
      "name": "session_id",
      "comment": "会话",
      "null": false,
      "type": "bigint"
    },
    {
      "name": "snapshot_uid",
      "comment": "快照UID",
      "null": false,
      "type": "str",
      "length": 32
    },
    {
      "name": "state_fingerprint",
      "comment": "状态指纹",
      "null": false,
      "type": "str",
      "length": 32
    },
    {
      "name": "entities_json",
      "comment": "实体集",
      "null": true,
      "type": "json"
    },
    {
      "name": "events_through_seq",
      "comment": "截至序号",
      "null": false,
      "type": "bigint"
    },
    {
      "name": "reason",
      "comment": "触发原因",
      "null": false,
      "type": "str",
      "length": 64
    },
    {
      "name": "created_at",
      "comment": "创建时间",
      "null": false,
      "type": "datetime"
    },
    {
      "name": "updated_at",
      "comment": "更新时间",
      "null": false,
      "type": "datetime"
    }
  ],
  "indexes": [
    {
      "name": "uk_wss_uid",
      "unique": true,
      "fields": [
        "tenant_id",
        "snapshot_uid"
      ]
    },
    {
      "name": "PRIMARY",
      "unique": true,
      "fields": [
        "id"
      ]
    }
  ],
  "codes": []
}