{
  "properties": {
    "model": {
      "type": "String",
      "length": 50,
      "index": true
    },
    "refId": {
      "type": "String",
      "length": 50,
      "index": true
    },
    "column": {
      "type": "String",
      "length": 50,
      "index": true
    },
    "file": {
      "type": "String",
      "length": 255,
      "index": true
    },
    "type": {
      "type": "String",
      "length": 20,
      "index": true
    },
    "size": {
      "type": "Number",
      "index": true
    }
  },
  "feature": ["createdAt", "ndutAuthCreatedBy"]
}