{
  "db_name": "PostgreSQL",
  "query": "SELECT EXISTS(SELECT 1 FROM log_file WHERE hostname = $1 AND log_ts = $2)",
  "describe": {
    "columns": [
      {
        "ordinal": 0,
        "name": "exists",
        "type_info": "Bool"
      }
    ],
    "parameters": {
      "Left": [
        "Text",
        "Timestamp"
      ]
    },
    "nullable": [
      null
    ]
  },
  "hash": "dee32ce9c4010ae407b4d1ba2ecf2062c36ee5dab3d4894ad4b2aa8b2f5a0db9"
}
