我已经创建了一个带有游标和varchar2作为输出的oracle过程：
angles = []
a=<number too big to put here>
b=<number too big to put here>
c=<number too big to put here>
angles.append(degrees(acos((decimal.Decimal(b) ** 2 + decimal.Decimal(c) ** 2 - decimal.Decimal(a) ** 2) / (2 * decimal.Decimal(b) * decimal.Decimal(c)))))
angles.append(degrees(acos((decimal.Decimal(c) ** 2 + decimal.Decimal(a) ** 2 - decimal.Decimal(b) ** 2) / (2 * decimal.Decimal(c) * decimal.Decimal(a)))))
angles.append(degrees(acos((decimal.Decimal(a) ** 2 + decimal.Decimal(b) ** 2 - decimal.Decimal(c) ** 2) / (2 * decimal.Decimal(a) * decimal.Decimal(b)))))
并且我还创建了我的实体类和存储库：
Traceback (most recent call last):
File "G:/Python Projects/perfectTriangle1/testangle.py", line 13, in <module>
angles.append(degrees(acos((decimal.Decimal(b) ** 2 + decimal.Decimal(c) ** 2 - decimal.Decimal(a) ** 2) / (2 * decimal.Decimal(b) * decimal.Decimal(c)))))
decimal.InvalidOperation: [<class 'decimal.InvalidOperation'>]
请支持我如何定义NamedStoredProcedureQueries和存储库定义。