Fixes to work with MySQLdb-0.9.0.

A plus or minus in front of the database name can force transactions on
or off.

Make use of MySQLdb.conversions. Only the SQL -> Python conversions are
actually used by ZMySQLDA.

A minor bug in MySQLdb-0.9.0c1 keeps it from working with this, only
seen with not using mx.DateTime. Fixed in CVS. Will release 0.9.0c2
before doing another ZMySQLDA release.

ZMySQLDA/lib/python/Products/ZMySQLDA/VERSION.txt

@@ -1 +1 @@
-ZMySQLDA 2.0.6
+ZMySQLDA 2.0.7b1

ZMySQLDA/lib/python/Products/ZMySQLDA/connectionAdd.dtml

@@ -49,7 +49,7 @@
     The connection string used for Z MySQL Database Connection
     is of the form:
 <pre>
-       database[@host[:port]] [user [password [unix_socket]]]
+       [+/-]database[@host[:port]] [user [password [unix_socket]]]
 </pre>
     or typically:
 <pre>
@@ -59,7 +59,15 @@
     Only specify host if the server is on a remote system. You can
     use a non-standard port, if necessary. If the UNIX socket is in
     a non-standard location, you can specify the full path to it
-    after the password.
+    after the password. A '-' in front of the database tells ZMySQLDA
+    to not use Zope's Transaction Manager, even if the server supports
+    transactions. A '+' in front of the database tells ZMySQLDA that
+    it must use transactions; an exception will be raised if they are
+    not supported by the server. If neither '-' or '+' are present,
+    then transactions will be enabled if the server supports them.
+    If you are using non-transaction safe tables (TSTs) on a server that
+    supports TSTs, use '-'. If you require transactions, use '+'. If
+    you aren't sure, don't use either.
 </dd></dl>
 
   </body>

ZMySQLDA/lib/python/Products/ZMySQLDA/db.py

@@ -87,6 +87,7 @@
 __version__='$Revision$'[11:-2]
 
 import _mysql
+from MySQLdb.converters import conversions
 from MySQLdb.constants import FIELD_TYPE, CR, CLIENT
 from _mysql_exceptions import OperationalError
 from Shared.DC.ZRDB.TM import TM
@@ -101,6 +102,8 @@ hosed_connection = (
     CR.SERVER_LOST
     )
 
+MySQLdb_version_required = (0,9,0)
+
 def _mysql_timestamp_converter(s):
 	if len(s) < 14:
 		s = s + "0"*(14-len(s))
@@ -139,19 +142,10 @@ class DB(TM):
 	FIELD_TYPE.BLOB: "BLOB", FIELD_TYPE.STRING: "STRING",
         }
 
-    conv={
+    conv=conversions.copy()
-        FIELD_TYPE.TIMESTAMP: _mysql_timestamp_converter,
+    conv[FIELD_TYPE.DATETIME] = DateTime_or_None
-        FIELD_TYPE.TINY: int,
+    conv[FIELD_TYPE.DATE] = DateTime_or_None
-        FIELD_TYPE.SHORT: int,
+    del conv[FIELD_TYPE.TIME]
-        FIELD_TYPE.LONG: long,
-        FIELD_TYPE.FLOAT: float,
-        FIELD_TYPE.DOUBLE: float,
-        FIELD_TYPE.LONGLONG: long,
-        FIELD_TYPE.INT24: int,
-        FIELD_TYPE.YEAR: int,
-	FIELD_TYPE.DATETIME: DateTime_or_None,
-	FIELD_TYPE.DATE: DateTime_or_None,
-        }
 
     _p_oid=_p_changed=_registered=None
 
@@ -159,7 +153,16 @@ class DB(TM):
         self.connection=connection
         self.kwargs = kwargs = self._parse_connection_string(connection)
         self.db=apply(self.Database_Connection, (), kwargs)
+        v = self.db.hasattr('version_info', (0,0,0))
+        if v < MySQLdb_version_required:
+            raise NotSupportedError, \
+                "ZMySQLDA requires at least MySQLdb %s, %s found" % \
+                (MySQLdb_version_required, v)
 	self.transactions = self.db.server_capabilities & CLIENT.TRANSACTIONS
+        if self._try_transactions == '-':
+            self.transactions = 0
+        elif not self.transactions and self._try_transactions == '+':
+            raise NotSupportedError, "transactions supported by this server"
 
     def _parse_connection_string(self, connection):
         kwargs = {'conv': self.conv}
@@ -175,6 +178,11 @@ class DB(TM):
             kwargs['host'] = host
         else:
             kwargs['db'] = db_host
+        if kwargs['db'][0] in ('+', '-'):
+            self._try_transactions = kwargs['db'][0]
+            kwargs['db'] = kwargs['db'][1:]
+        else:
+            self._try_transactions = None
         if not items: return kwargs
         kwargs['user'], items = items[0], items[1:]
         if not items: return kwargs