{
    "summary": [{"name": "pipeline_usage_log", "title": "产线调用日志表", "primary": ["id"]}],
    "fields": [
        {"name": "id", "title": "主键", "type": "str", "length": 32, "nullable": "no"},
        {"name": "pipeline_id", "title": "产线ID", "type": "str", "length": 32, "nullable": "no"},
        {"name": "user_id", "title": "用户ID", "type": "str", "length": 32},
        {"name": "distributor_id", "title": "分销商ID", "type": "str", "length": 32},
        {"name": "call_count", "title": "调用次数", "type": "int", "default": "1"},
        {"name": "token_input", "title": "输入Token数", "type": "int", "default": "0"},
        {"name": "token_output", "title": "输出Token数", "type": "int", "default": "0"},
        {"name": "amount", "title": "金额", "type": "double", "length": 15, "dec": 4, "default": "0"},
        {"name": "status", "title": "状态", "type": "str", "length": 20},
        {"name": "error_message", "title": "错误信息", "type": "text"},
        {"name": "called_at", "title": "调用时间", "type": "timestamp"}
    ],
    "indexes": [
        {"name": "idx_usagelog_pipeline", "idxtype": "index", "idxfields": ["pipeline_id"]},
        {"name": "idx_usagelog_called_at", "idxtype": "index", "idxfields": ["called_at"]},
        {"name": "idx_usagelog_distributor", "idxtype": "index", "idxfields": ["distributor_id"]}
    ],
    "codes": [
        {"field": "pipeline_id", "table": "pipelines", "valuefield": "id", "textfield": "name"}
    ]
}