SQL Server/SQLAlchemy 中按 CASE 分组

Question

在 Sqlalchemy (0.8.2) 中，我尝试按情况选择案例组， 如下所示：

query = """
     SELECT count([HR_PERSONNEL].[S_HR_PERSONNEL_ID]) AS value, 
       CASE 
         WHEN (floor(datediff(day, [HR_PERSONNEL].[D_DATE_OF_BIRTH], CURRENT_TIMESTAMP) / 365.25) < 15) THEN 15 
         WHEN (floor(datediff(day, [HR_PERSONNEL].[D_DATE_OF_BIRTH], CURRENT_TIMESTAMP) / 365.25) BETWEEN 15 AND 19) THEN 19
         ELSE 100 END AS anon_1 
      FROM [HR_PERSONNEL] 
      GROUP BY CASE 
        WHEN (floor(datediff(day, [HR_PERSONNEL].[D_DATE_OF_BIRTH], CURRENT_TIMESTAMP) / 365.25) < 15) THEN 15 
        WHEN (floor(datediff(day, [HR_PERSONNEL].[D_DATE_OF_BIRTH], CURRENT_TIMESTAMP) / 365.25) BETWEEN 15 AND 19) THEN 19 
        ELSE 100 END"""

纯文本 SQL 查询可以使用 SA 执行，不会出现问题：

>>> for i in mssql_engine.execute(query):
        print i

(11, 15)
(1097, 19)
(63878, 100)

但我在 SQLAlchemy ORM 中使用相同的查询时遇到问题：

>>> age_case_groups =case([( floor_function  < 15, 15)\
                                ,(between(floor_function,15,19), 19)],else_=100)
>>> vols_by_age = session.query(func.count(HrPersonnel.S_HR_PERSONNEL_ID).label('value'),age_case_groups)\
                .group_by(age_case_groups)
>>> vols_by_age.all()

 Traceback (most recent call last):
      File "<pyshell#43>", line 1, in <module>
        vols_by_age.all()
      File "build\bdist.win32\egg\sqlalchemy\orm\query.py", line 2104, in all
        return list(self)
      File "build\bdist.win32\egg\sqlalchemy\orm\query.py", line 2216, in __iter__
        return self._execute_and_instances(context)
      File "build\bdist.win32\egg\sqlalchemy\orm\query.py", line 2231, in _execute_and_instances
        result = conn.execute(querycontext.statement, self._params)
      File "build\bdist.win32\egg\sqlalchemy\engine\base.py", line 662, in execute
        params)
      File "build\bdist.win32\egg\sqlalchemy\engine\base.py", line 761, in _execute_clauseelement
        compiled_sql, distilled_params
      File "build\bdist.win32\egg\sqlalchemy\engine\base.py", line 874, in _execute_context
        context)
      File "build\bdist.win32\egg\sqlalchemy\engine\base.py", line 1024, in _handle_dbapi_exception
        exc_info
      File "build\bdist.win32\egg\sqlalchemy\util\compat.py", line 163, in raise_from_cause
        reraise(type(exception), exception, tb=exc_tb)
      File "build\bdist.win32\egg\sqlalchemy\engine\base.py", line 867, in _execute_context
        context)
      File "build\bdist.win32\egg\sqlalchemy\engine\default.py", line 324, in do_execute
        cursor.execute(statement, parameters)

编程错误：(ProgrammingError) ('42000'，“[42000] [Microsoft][ODBC SQL Server Driver][SQL Server]列 'HR_PERSONNEL.D_DATE_OF_BIRTH' 在选择列表中无效，因为它不包含在聚合函数或GROUP BY 子句。(8120) (SQLExecDirectW); [42000] [Microsoft][ODBC SQL Server Driver][SQL Server]列“HR_PERSONNEL.D_DATE_OF_BIRTH”在选择列表中无效，因为它不包含在聚合函数中或 GROUP BY 子句。(8120); [42000] [Microsoft][ODBC SQL Server Driver][SQL Server]列“HR_PERSONNEL.D_DATE_OF_BIRTH”在选择列表中无效，因为它未包含在聚合函数或GROUP BY 子句。(8120); [42000] [Microsoft][ODBC SQL Server 驱动程序][SQL Server]无法准备语句。(8180)") u'SELECT count([HR_PERSONNEL].[S_HR_PERSONNEL_ID] ) AS 值，CASE WHEN (floor(datediff(day, [HR_PERSONNEL].[D_DATE_OF_BIRTH], CURRENT_TIMESTAMP) / ?) < ?) 那么？何时 (floor(datediff(day, [HR_PERSONNEL].[D_DATE_OF_BIRTH], CURRENT_TIMESTAMP) / ?) 之间？和？) 那么？别的 ？END AS anon_1 \nFROM [HR_PERSONNEL] GROUP BY CASE WHEN (floor(datediff(day, [HR_PERSONNEL].[D_DATE_OF_BIRTH], CURRENT_TIMESTAMP) / ?) < ?) THEN ? 何时 (floor(datediff(day, [HR_PERSONNEL].[D_DATE_OF_BIRTH], CURRENT_TIMESTAMP) / ?) 之间？和？) 那么？别的 ？结束' (365.25, 15, 15, 365.25, 15, 19, 19, 100, 365.25, 15, 15, 365.25, 15, 19, 19, 100)

看起来像是 MSSQL/ODBC 错误？？？