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 d e i f d „  ƒ  YZ d e f d	 „  ƒ  YZ d
 e e f d „  ƒ  YZ e Z d S(   s`	  
Support for MS-SQL via pyodbc.

pyodbc is available at:

    http://pypi.python.org/pypi/pyodbc/

Connecting
^^^^^^^^^^

Examples of pyodbc connection string URLs:

* ``mssql+pyodbc://mydsn`` - connects using the specified DSN named ``mydsn``.
  The connection string that is created will appear like::

    dsn=mydsn;Trusted_Connection=Yes

* ``mssql+pyodbc://user:pass@mydsn`` - connects using the DSN named
  ``mydsn`` passing in the ``UID`` and ``PWD`` information. The
  connection string that is created will appear like::

    dsn=mydsn;UID=user;PWD=pass

* ``mssql+pyodbc://user:pass@mydsn/?LANGUAGE=us_english`` - connects
  using the DSN named ``mydsn`` passing in the ``UID`` and ``PWD``
  information, plus the additional connection configuration option
  ``LANGUAGE``. The connection string that is created will appear
  like::

    dsn=mydsn;UID=user;PWD=pass;LANGUAGE=us_english

* ``mssql+pyodbc://user:pass@host/db`` - connects using a connection string
  dynamically created that would appear like::

    DRIVER={SQL Server};Server=host;Database=db;UID=user;PWD=pass

* ``mssql+pyodbc://user:pass@host:123/db`` - connects using a connection
  string that is dynamically created, which also includes the port
  information using the comma syntax. If your connection string
  requires the port information to be passed as a ``port`` keyword
  see the next example. This will create the following connection
  string::

    DRIVER={SQL Server};Server=host,123;Database=db;UID=user;PWD=pass

* ``mssql+pyodbc://user:pass@host/db?port=123`` - connects using a connection
  string that is dynamically created that includes the port
  information as a separate ``port`` keyword. This will create the
  following connection string::

    DRIVER={SQL Server};Server=host;Database=db;UID=user;PWD=pass;port=123

If you require a connection string that is outside the options
presented above, use the ``odbc_connect`` keyword to pass in a
urlencoded connection string. What gets passed in will be urldecoded
and passed directly.

For example::

    mssql+pyodbc:///?odbc_connect=dsn%3Dmydsn%3BDatabase%3Ddb

would create the following connection string::

    dsn=mydsn;Database=db

Encoding your connection string can be easily accomplished through
the python shell. For example::

    >>> import urllib
    >>> urllib.quote_plus('dsn=mydsn;Database=db')
    'dsn%3Dmydsn%3BDatabase%3Ddb'


iÿÿÿÿ(   t   MSExecutionContextt	   MSDialect(   t   PyODBCConnector(   t   typest   utilNt   _MSNumeric_pyodbcc           B   s)   e  Z d  Z d „  Z d „  Z d „  Z RS(   sÕ   Turns Decimals with adjusted() < 0 or > 7 into strings.

    This is the only method that is proven to work with Pyodbc+MSSQL
    without crashing (floats can be used but seem to cause sporadic
    crashes).

    c            s.   t  t ˆ ƒ i | ƒ ‰  ‡  ‡ f d †  } | S(   Nc            s}   ˆ i  oY t |  t i ƒ oF |  i ƒ  } | d j  o ˆ i |  ƒ S| d j o ˆ i |  ƒ Sn ˆ  o ˆ  |  ƒ S|  Sd  S(   Ni    i   (   t	   asdecimalt
   isinstancet   decimalt   Decimalt   adjustedt   _small_dec_to_stringt   _large_dec_to_string(   t   valueR
   (   t   super_processt   self(    sk   p:\graphics\tools\python26\lib\site-packages\sqlalchemy-0.6.6-py2.6.egg\sqlalchemy\dialects\mssql\pyodbc.pyt   processc   s    
(   t   superR   t   bind_processor(   R   t   dialectR   (    (   R   R   sk   p:\graphics\tools\python26\lib\site-packages\sqlalchemy-0.6.6-py2.6.egg\sqlalchemy\dialects\mssql\pyodbc.pyR   `   s    c      	   C   sf   d | d j  o d p d d t  | i ƒ  ƒ d d i g  } | i D] } | t | ƒ qE ~ ƒ f S(   Ns   %s0.%s%si    t   -t    t   0i   (   t   absR
   t   joint   _intt   str(   R   R   t   _[1]t   nint(    (    sk   p:\graphics\tools\python26\lib\site-packages\sqlalchemy-0.6.6-py2.6.egg\sqlalchemy\dialects\mssql\pyodbc.pyR   s   s    c         C   s°  d t  | ƒ j os d | d j  o d p d d i g  } | i D] } | t  | ƒ qA ~ ƒ d | i ƒ  t | i ƒ d f } n't | i ƒ d | i ƒ  j o¤ d | d j  o d p d d i g  } | i D] } | t  | ƒ qÔ ~ d | i ƒ  d !ƒ d i g  } | i D] } | t  | ƒ q~ | i ƒ  d ƒ f } nc d	 | d j  o d p d d i g  } | i D] } | t  | ƒ qx~ d | i ƒ  d !ƒ f } | S(
   Nt   Es   %s%s%si    R   R   R   i   s   %s%s.%ss   %s%s(   R   R   R   R
   t   len(   R   R   R   t   st   resultt   _[2]t   _[3]t   _[4](    (    sk   p:\graphics\tools\python26\lib\site-packages\sqlalchemy-0.6.6-py2.6.egg\sqlalchemy\dialects\mssql\pyodbc.pyR   y   s"    0) ;CB(   t   __name__t
   __module__t   __doc__R   R   R   (    (    (    sk   p:\graphics\tools\python26\lib\site-packages\sqlalchemy-0.6.6-py2.6.egg\sqlalchemy\dialects\mssql\pyodbc.pyR   W   s   		t   MSExecutionContext_pyodbcc           B   s    e  Z e Z d  „  Z d „  Z RS(   c         C   s^   t  t |  ƒ i ƒ  |  i o= |  i i o0 t |  i d ƒ o t |  _	 |  i
 d 7_
 n d S(   sº  where appropriate, issue "select scope_identity()" in the same
        statement.

        Background on why "scope_identity()" is preferable to "@@identity":
        http://msdn.microsoft.com/en-us/library/ms190315.aspx

        Background on why we attempt to embed "scope_identity()" into the same
        statement as the INSERT:
        http://code.google.com/p/pyodbc/wiki/FAQs#How_do_I_retrieve_autogenerated/identity_values?

        i    s   ; select scope_identity()N(   R   R'   t   pre_exect   _select_lastrowidR   t   use_scope_identityR   t
   parameterst   Truet   _embedded_scope_identityt	   statement(   R   (    (    sk   p:\graphics\tools\python26\lib\site-packages\sqlalchemy-0.6.6-py2.6.egg\sqlalchemy\dialects\mssql\pyodbc.pyR(   ’   s    
	c         C   s   |  i  ol xR t oJ y |  i i ƒ  d } PWq |  i i i j
 o } |  i i ƒ  q Xq Wt | d ƒ |  _	 n t
 t |  ƒ i ƒ  d  S(   Ni    (   R-   R,   t   cursort   fetchallR   t   dbapit   Errort   nextsett   intt
   _lastrowidR   R'   t	   post_exec(   R   t   rowt   e(    (    sk   p:\graphics\tools\python26\lib\site-packages\sqlalchemy-0.6.6-py2.6.egg\sqlalchemy\dialects\mssql\pyodbc.pyR6   ª   s    
 (   R$   R%   t   FalseR-   R(   R6   (    (    (    sk   p:\graphics\tools\python26\lib\site-packages\sqlalchemy-0.6.6-py2.6.egg\sqlalchemy\dialects\mssql\pyodbc.pyR'      s   	t   MSDialect_pyodbcc           B   s?   e  Z e Z d  Z e i e i h e	 e
 i 6ƒ Z d d „ Z RS(   s
   SQL Servers   latin-1c         K   sE   t  t |  ƒ i |   | |  _ |  i o t |  i i d ƒ |  _ d  S(   NR3   (   R   R:   t   __init__t   description_encodingR1   t   hasattrt   CursorR*   (   R   R<   t   params(    (    sk   p:\graphics\tools\python26\lib\site-packages\sqlalchemy-0.6.6-py2.6.egg\sqlalchemy\dialects\mssql\pyodbc.pyR;   Ì   s    	
(   R$   R%   R'   t   execution_ctx_clst   pyodbc_driver_nameR   t   update_copyR   t   colspecsR   t   sqltypest   NumericR;   (    (    (    sk   p:\graphics\tools\python26\lib\site-packages\sqlalchemy-0.6.6-py2.6.egg\sqlalchemy\dialects\mssql\pyodbc.pyR:   ¿   s   (   R&   t   sqlalchemy.dialects.mssql.baseR    R   t   sqlalchemy.connectors.pyodbcR   t
   sqlalchemyR   RD   R   R   RE   R   R'   R:   R   (    (    (    sk   p:\graphics\tools\python26\lib\site-packages\sqlalchemy-0.6.6-py2.6.egg\sqlalchemy\dialects\mssql\pyodbc.pyt   <module>P   s   80