{
  "db_name": "PostgreSQL",
  "query": "DELETE FROM chat_messages c\n         USING (\n             SELECT ranked.id\n             FROM (\n                 SELECT id,\n                        community_id,\n                        row_number() OVER (\n                            PARTITION BY community_id ORDER BY id DESC\n                        ) AS rn\n                 FROM chat_messages\n             ) ranked\n             JOIN communities co ON co.id = ranked.community_id\n             WHERE ranked.rn > co.chat_max_messages\n         ) over_cap\n         WHERE c.id = over_cap.id",
  "describe": {
    "columns": [],
    "parameters": {
      "Left": []
    },
    "nullable": []
  },
  "hash": "b906fcd4514fc310fcb6920d5b51477ab27b3f6bcb83e854243c85734a4f9cae"
}