Question

在Sqlalchemy（0.8.2）我试图选择CASE GROUP BY CASE 类似的东西：

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"""

可以使用SA执行纯文本SQL查询而不会出现问题：

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

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

但我在SQLAlchemy ORM中遇到同一个查询的问题：

>>> 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)

ProgrammingError :( ProgrammingError）（'42000'，“[42000] [Microsoft] [ODBC SQL Server驱动程序] [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中条款。（8120）（SQLExecDirectW）; [42000] [Microsoft] [ODBC SQL Server 驱动程序] [SQL Server]列'HR_PERSONNEL.D_DATE_OF_BIRTH'无效选择列表，因为它不包含在聚合中函数或GROUP BY子句。（8120）; [42000] [Microsoft] [ODBC SQL 服务器驱动程序] [SQL Server]列'HR_PERSONNEL.D_DATE_OF_BIRTH'是在选择列表中无效，因为它不包含在任何一个中聚合函数或GROUP BY子句。（8120）; [42000] [Microsoft] [ODBC SQL Server驱动程序] [SQL Server]语句不能做好准备（8180）“）你的意思 count（[HR_PERSONNEL]。[S_HR_PERSONNEL_ID]）AS值，CASE WHEN （楼层（dateiff（天，[HR_PERSONNEL]。[D_DATE_OF_BIRTH]， CURRENT_TIMESTAMP）/？）＆lt; ？）然后？什么时候（楼（日期） [HR_PERSONNEL]。[D_DATE_OF_BIRTH]，CURRENT_TIMESTAMP）/？）BETWEEN？然后？ ELSE？结束为anon_1 \ nFROM [HR_PERSONNEL] GROUP BY CASE 什么时候（楼层（日期，日期，[HR_PERSONNEL]。[D_DATE_OF_BIRTH]， CURRENT_TIMESTAMP）/？）＆lt; ？）然后？什么时候（楼（日期） [HR_PERSONNEL]。[D_DATE_OF_BIRTH]，CURRENT_TIMESTAMP）/？）BETWEEN？然后？ ELSE？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MSSQL / ODBC bug ???

SQL Server / SQLAlchemy中的CASE分组

0 个答案: