{
  "db_name": "MySQL",
  "query": "SELECT id,dn FROM users WHERE username=?",
  "describe": {
    "columns": [
      {
        "ordinal": 0,
        "name": "id",
        "type_info": {
          "type": "LongLong",
          "flags": "NOT_NULL | PRIMARY_KEY | UNSIGNED | AUTO_INCREMENT",
          "char_set": 63,
          "max_size": 20
        }
      },
      {
        "ordinal": 1,
        "name": "dn",
        "type_info": {
          "type": "VarString",
          "flags": "",
          "char_set": 224,
          "max_size": 1024
        }
      }
    ],
    "parameters": {
      "Right": 1
    },
    "nullable": [
      false,
      true
    ]
  },
  "hash": "bfbd002137bcf942b9911eac9cce4b4592616cad37afdb2b1e40bd38cbf2190c"
}