{
 "id": "m0015",
 "title": "llm_model 删除价格/成本四字段（price_input/price_output/cost_input/cost_output）——定价统一走 ppid 定价平台，模型表不再存单价（2026-09-04 用户定夺）（原编号m0009与rag迁移撞号被静默覆盖从未执行，2026-09-09改号；测试库列已不存在，守卫将全skip）",
 "backup_tables": [
  "llm_model"
 ],
 "up": [
  {
   "op": "sql",
   "sql": "ALTER TABLE llm_model DROP COLUMN price_input"
  },
  {
   "op": "sql",
   "sql": "ALTER TABLE llm_model DROP COLUMN price_output"
  },
  {
   "op": "sql",
   "sql": "ALTER TABLE llm_model DROP COLUMN cost_input"
  },
  {
   "op": "sql",
   "sql": "ALTER TABLE llm_model DROP COLUMN cost_output"
  }
 ],
 "down": [
  {
   "op": "sql",
   "sql": "ALTER TABLE llm_model ADD COLUMN price_input DECIMAL(12,6) NOT NULL DEFAULT 0 COMMENT '输入单价(元/千token)'"
  },
  {
   "op": "sql",
   "sql": "ALTER TABLE llm_model ADD COLUMN price_output DECIMAL(12,6) NOT NULL DEFAULT 0 COMMENT '输出单价(元/千token)'"
  },
  {
   "op": "sql",
   "sql": "ALTER TABLE llm_model ADD COLUMN cost_input DECIMAL(12,6) NOT NULL DEFAULT 0 COMMENT '输入成本(元/千token)'"
  },
  {
   "op": "sql",
   "sql": "ALTER TABLE llm_model ADD COLUMN cost_output DECIMAL(12,6) NOT NULL DEFAULT 0 COMMENT '输出成本(元/千token)'"
  }
 ]
}