1 files changed, 32 insertions, 23 deletions
diff --git a/migrate/changeset/databases/postgres.py b/migrate/changeset/databases/postgres.py
index 8c907fd..d1d4cc8 100644
--- a/migrate/changeset/databases/postgres.py
+++ b/migrate/changeset/databases/postgres.py
@@ -1,44 +1,53 @@
+"""
+   `PostgreSQL`_ database specific implementations of changeset classes.
+
+   .. _`PostgreSQL`: http://www.postgresql.org/
+"""
 from migrate.changeset import ansisql
 from sqlalchemy.databases import postgres as sa_base
 #import sqlalchemy as sa
 
+
 PGSchemaGenerator = sa_base.PGSchemaGenerator
 
+
 class PGSchemaGeneratorMixin(object):
-    def _do_quote_table_identifier(self, identifier):
-        return identifier
-    def _do_quote_column_identifier(self, identifier):
-        return '"%s"'%identifier
+    """Common code used by the PostgreSQL specific classes."""
 
-class PGColumnGenerator(PGSchemaGenerator,ansisql.ANSIColumnGenerator, PGSchemaGeneratorMixin):
     def _do_quote_table_identifier(self, identifier):
         return identifier
+
     def _do_quote_column_identifier(self, identifier):
         return '"%s"'%identifier
 
+
+class PGColumnGenerator(PGSchemaGenerator, ansisql.ANSIColumnGenerator,
+                        PGSchemaGeneratorMixin):
+    """PostgreSQL column generator implementation."""
+    pass
+
+
 class PGColumnDropper(ansisql.ANSIColumnDropper, PGSchemaGeneratorMixin):
-    def _do_quote_table_identifier(self, identifier):
-        return identifier
-    def _do_quote_column_identifier(self, identifier):
-        return '"%s"'%identifier
+    """PostgreSQL column dropper implementation."""
+    pass
+
 
 class PGSchemaChanger(ansisql.ANSISchemaChanger, PGSchemaGeneratorMixin):
-    def _do_quote_table_identifier(self, identifier):
-        return identifier
-    def _do_quote_column_identifier(self, identifier):
-        return '"%s"'%identifier
+    """PostgreSQL schema changer implementation."""
+    pass
 
-class PGConstraintGenerator(ansisql.ANSIConstraintGenerator, PGSchemaGeneratorMixin):
-    def _do_quote_table_identifier(self, identifier):
-        return identifier
-    def _do_quote_column_identifier(self, identifier):
-        return '"%s"'%identifier
 
-class PGConstraintDropper(ansisql.ANSIConstraintDropper, PGSchemaGeneratorMixin):
-    def _do_quote_table_identifier(self, identifier):
-        return identifier
-    def _do_quote_column_identifier(self, identifier):
-        return '"%s"'%identifier
+class PGConstraintGenerator(ansisql.ANSIConstraintGenerator,
+                            PGSchemaGeneratorMixin):
+    """PostgreSQL constraint generator implementation."""
+    pass
+
+
+class PGConstraintDropper(ansisql.ANSIConstraintDropper,
+                          PGSchemaGeneratorMixin):
+    """PostgreSQL constaint dropper implementation."""
+    pass
+
 
 class PGDialect(ansisql.ANSIDialect):
     columngenerator = PGColumnGenerator