Finish addition of TDS protver 7.3 ID support.

Author: ramiro

ChangeLog

@@ -12,7 +12,8 @@ TBA
 Bug fixes
 ---------
 
-TBA
+- Finish implementation of TDS protocol version 7.3 support by actually
+  accepting ``"7.3"`` as TDS protocol version when establishing a connection.
 
 Version 2.1.3 - 2016-06-22 - Ramiro Morales
 ===========================================

_mssql.pyx

@@ -34,6 +34,8 @@ DEF EXCOMM = 9
 # Provide constants missing in FreeTDS 0.82 so that we can build against it
 DEF DBVERSION_71 = 5
 DEF DBVERSION_72 = 6
+# Provide constant missing from FreeTDS 0.91 so that we can build against it
+DEF DBVERSION_73 = 7
 
 ROW_FORMAT_TUPLE = 1
 ROW_FORMAT_DICT = 2
@@ -1701,6 +1703,8 @@ cdef int _tds_ver_str_to_constant(verstr) except -1:
         return DBVERSION_71
     if verstr == u'7.2':
         return DBVERSION_72
+    if verstr == u'7.3':
+        return DBVERSION_73
     raise MSSQLException('unrecognized tds version: %s' % verstr)
 
 #######################

docs/ref/_mssql.rst

@@ -126,6 +126,12 @@ Functions
             <http://www.freetds.org/userguide/freetdsconf.htm#TAB.FREETDS.CONF>`_
             `and here <http://www.freetds.org/userguide/envvar.htm>`_)
 
+    .. warning::
+      FreeTDS added support for TDS protocol version 7.3 in version 0.95. You
+      need to be careful of not asking for TDS 7.3 if you know the undelying
+      FreeTDS used by pymssql is older as it won't raise any error nor keep you
+      from passing such an invalid value.
+
 ``MSSQLConnection`` object properties
 -------------------------------------
 

docs/ref/pymssql.rst

@@ -110,6 +110,12 @@ Functions
          <http://www.freetds.org/userguide/freetdsconf.htm#TAB.FREETDS.CONF>`_
          `and here <http://www.freetds.org/userguide/envvar.htm>`_)
 
+   .. warning::
+     FreeTDS added support for TDS protocol version 7.3 in version 0.95. You
+     need to be careful of not asking for TDS 7.3 if you know the undelying
+     FreeTDS used by pymssql is older as it won't raise any error nor keep you
+     from passing such an invalid value.
+
 .. function:: get_dbversion()
 
     TBD