unixODBC 错误 IM001

Question

尝试执行任何简单查询时出现以下错误。我只是不明白发生了什么变化。

以下是 sqlalchemy (Elixir) 类的示例：

class Song(Entity):
    using_options(tablename='tbSongs', autoload=True)
    using_table_options(schema='apra')

数据库连接正常并且类构造正常，因为我可以执行 dir(Song) 并查看所有正确的列。然而，简单的查询是行不通的。

以下是对该类的查询和结果输出：

>>> songs = Song.query.all()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/site-packages/sqlalchemy/orm/query.py", line 1729, in all
    return list(self)
  File "/usr/lib/python2.7/site-packages/sqlalchemy/orm/query.py", line 1839, in __iter__
    return self._execute_and_instances(context)
  File "/usr/lib/python2.7/site-packages/sqlalchemy/orm/query.py", line 1854, in _execute_and_instances
    result = conn.execute(querycontext.statement, self._params)
  File "/usr/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1399, in execute
    params)
  File "/usr/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1532, in _execute_clauseelement
    compiled_sql, distilled_params
  File "/usr/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1640, in _execute_context
    context)
  File "/usr/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1633, in _execute_context
    context)
  File "/usr/lib/python2.7/site-packages/sqlalchemy/engine/default.py", line 325, in do_execute
    cursor.execute(statement, parameters)
sqlalchemy.exc.DBAPIError: (Error) ('IM001', '[IM001] [unixODBC][Driver Manager]Driver does not support this function (0) (SQLColAttribute)') 'SELECT [tbSongs_1].[ID_Song] AS [apra_tbSongs_ID_Song], [tbSongs_1].[Album] AS [apra_tbSongs_Album], [tbSongs_1].[Title] AS [apra_tbSongs_Title], [tbSongs_1].[Composer] AS [apra_tbSongs_Composer], [tbSongs_1].[Performer] AS [apra_tbSongs_Performer], [tbSongs_1].[TrackNumber] AS [apra_tbSongs_TrackNumber], [tbSongs_1].[Duration] AS [apra_tbSongs_Duration], [tbSongs_1].[RecordLabel] AS [apra_tbSongs_RecordLabel], [tbSongs_1].[Notes] AS [apra_tbSongs_Notes], [tbSongs_1].[Class] AS [apra_tbSongs_Class], [tbSongs_1].[SongID] AS [apra_tbSongs_SongID], [tbSongs_1].[Deleted] AS [apra_tbSongs_Deleted] \nFROM apra.[tbSongs] AS [tbSongs_1]' ()
>>> 

设置详细信息：

• 32bit Arch Linux
• Python 2.7.2
• sqlalchemy 0.7.2
• elixir 0.7.1
• FreeTDS 0.82-5
• unixodbc 2.3.0-1

/etc/odbcinst.ini:

[ODBC Drivers]
tds = Installed
[tds]
Driver = /usr/lib/libtdsodbc.so
Setup = /usr/lib/libtdsodbc.so

/etc/ odbc.ini：

[ODBC]
Trace = 0
[DBNAME]
Driver = TDS
Trace = No
Server = xx.xx.xx.xx\dbname
Database = dbname
Port = 1433

Answer 1

我也有这个错误，降级到 unixODBC 2.2.12 为我解决了这个问题（注意我无法让 PyOBDC 使用 2.2.14 构建，必须是 2.2.12）。我对 unix 的 ODBC 工具的新版本的状态感到相当困扰（Freetds 0.91 也有很大问题）。

Answer 2

尝试删除预打包的 FreeTDS、unixODBC 和 pyodbc。分别使用版本 0.91、2.3.0 和 2.1.9 从源进行重建对我来说很有效，但这可能是一个棘手的过程。我在 SQLAlchemy 小组最近的一个帖子中详细介绍了它，网址为 http:// groups.google.com/group/sqlalchemy/browse_thread/thread/971e068032d51dd5

Answer 3

您能否提供发生这种情况的 ODBC 跟踪？我刚刚意识到这个问题，而且我（目前）无法重现它。因此，如果您可以将其发生的日志发送给我，那么这应该是朝着正确方向迈出的一步。