{
  "summary": [
    {
      "name": "roster_timeline",
      "title": "员工时间轴",
      "pk": [
        "id"
      ],
      "charset": "utf8mb4",
      "collate": "utf8mb4_unicode_ci"
    }
  ],
  "fields": [
    {
      "name": "id",
      "title": "主键",
      "type": "varchar",
      "length": 32,
      "notnull": true
    },
    {
      "name": "employee_id",
      "title": "员工档案",
      "type": "varchar",
      "length": 32
    },
    {
      "name": "event_type",
      "title": "事件类型(entry/regular/transfer/leave/concurrent/contract/field_change/headcount/project/migrate)",
      "type": "varchar",
      "length": 24
    },
    {
      "name": "event_date",
      "title": "事件日期",
      "type": "date"
    },
    {
      "name": "title",
      "title": "标题",
      "type": "varchar",
      "length": 128
    },
    {
      "name": "content_json",
      "title": "内容JSON",
      "type": "text"
    },
    {
      "name": "source_type",
      "title": "来源类型",
      "type": "varchar",
      "length": 32
    },
    {
      "name": "source_id",
      "title": "来源ID",
      "type": "varchar",
      "length": 32
    },
    {
      "name": "created_at",
      "title": "创建时间",
      "type": "timestamp"
    }
  ],
  "indexes": [
    {
      "name": "idx_emp_date",
      "fields": [
        "employee_id",
        "event_date"
      ]
    }
  ],
  "codes": []
}