{
  "summary": [
    {
      "name": "headcount_snapshot",
      "title": "编制快照(F16历史回溯/实时计数)",
      "pk": [
        "id"
      ],
      "charset": "utf8mb4",
      "collate": "utf8mb4_unicode_ci"
    }
  ],
  "fields": [
    {
      "name": "id",
      "title": "主键",
      "type": "varchar",
      "length": 32,
      "notnull": true
    },
    {
      "name": "scheme_id",
      "title": "编制方案",
      "type": "varchar",
      "length": 32,
      "notnull": true
    },
    {
      "name": "item_id",
      "title": "细分项",
      "type": "varchar",
      "length": 32,
      "notnull": true
    },
    {
      "name": "snap_date",
      "title": "快照日期",
      "type": "date",
      "notnull": true
    },
    {
      "name": "used_count",
      "title": "占编人数",
      "type": "int",
      "notnull": true,
      "default": 0
    },
    {
      "name": "over_count",
      "title": "超编数(0=未超编)",
      "type": "int",
      "notnull": true,
      "default": 0
    },
    {
      "name": "created_at",
      "title": "创建时间",
      "type": "timestamp"
    }
  ],
  "indexes": [
    {
      "name": "uk_scheme_item_date",
      "fields": [
        "scheme_id",
        "item_id",
        "snap_date"
      ],
      "unique": true
    },
    {
      "name": "idx_snap_date",
      "fields": [
        "snap_date"
      ]
    }
  ],
  "codes": []
}