- reworked the DDL generation of ENUM and similar to be more platform agnostic.

Uses a straight CheckConstraint with a generic expression.  Preparing for boolean
constraint in [ticket:1589]
- CheckConstraint now accepts SQL expressions, though support for quoting of values
will be very limited.  we don't want to get into formatting dates and such.

1 files changed, 3 insertions, 6 deletions

diff --git a/lib/sqlalchemy/dialects/mysql/base.py b/lib/sqlalchemy/dialects/mysql/base.py
index d5ee4f5bb..3a2773892 100644
--- a/lib/sqlalchemy/dialects/mysql/base.py
+++ b/lib/sqlalchemy/dialects/mysql/base.py
@@ -1354,12 +1354,6 @@ class MySQLDDLCompiler(compiler.DDLCompiler):
 
         return ' '.join(colspec)
 
-    def visit_enum_constraint(self, constraint):
-        if not constraint.type.native_enum:
-            return super(MySQLDDLCompiler, self).visit_enum_constraint(constraint)
-        else:
-            return None
-
     def post_create_table(self, table):
         """Build table-level CREATE options like ENGINE and COLLATE."""
 
@@ -1661,6 +1655,9 @@ class MySQLDialect(default.DefaultDialect):
     # identifiers are 64, however aliases can be 255...
     max_identifier_length = 255
     
+    supports_native_enum = True
+    supports_native_boolean = True
+    
     supports_sane_rowcount = True
     supports_sane_multi_rowcount = False