{
  "id": "m0009",
  "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）",
  "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)'"}
  ]
}