Fixed #10473: Added Oracle support for "RETURNING" ids from insert statements.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10044 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/__init__.py

@@ -162,6 +162,14 @@ class BaseDatabaseOperations(object):
         """
         return None
 
+    def fetch_returned_insert_id(self, cursor):
+        """
+        Given a cursor object that has just performed an INSERT...RETURNING
+        statement into a table that has an auto-incrementing ID, returns the
+        newly created ID.
+        """
+        return cursor.fetchone()[0]
+
     def field_cast_sql(self, db_type):
         """
         Given a column type (e.g. 'BLOB', 'VARCHAR'), returns the SQL necessary
@@ -249,10 +257,10 @@ class BaseDatabaseOperations(object):
 
     def return_insert_id(self):
         """
-        For backends that support returning the last insert ID as part of an
-        insert query, this method returns the SQL to append to the INSERT
-        query. The returned fragment should contain a format string to hold
-        hold the appropriate column.
+        For backends that support returning the last insert ID as part
+        of an insert query, this method returns the SQL and params to
+        append to the INSERT query. The returned fragment should
+        contain a format string to hold the appropriate column.
         """
         pass
 

django/db/backends/oracle/base.py

@@ -37,6 +37,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     uses_custom_query_class = True
     interprets_empty_strings_as_nulls = True
     uses_savepoints = True
+    can_return_id_from_insert = True
 
 
 class DatabaseOperations(BaseDatabaseOperations):
@@ -97,6 +98,9 @@ WHEN (new.%(col_name)s IS NULL)
     def drop_sequence_sql(self, table):
         return "DROP SEQUENCE %s;" % self.quote_name(get_sequence_name(table))
 
+    def fetch_returned_insert_id(self, cursor):
+        return long(cursor._insert_id_var.getvalue())
+
     def field_cast_sql(self, db_type):
         if db_type and db_type.endswith('LOB'):
             return "DBMS_LOB.SUBSTR(%s)"
@@ -152,6 +156,9 @@ WHEN (new.%(col_name)s IS NULL)
         connection.cursor()
         return connection.ops.regex_lookup(lookup_type)
 
+    def return_insert_id(self):
+        return "RETURNING %s INTO %%s", (InsertIdVar(),)
+
     def savepoint_create_sql(self, sid):
         return "SAVEPOINT " + self.quote_name(sid)
 
@@ -332,8 +339,11 @@ class OracleParam(object):
     parameter when executing the query.
     """
 
-    def __init__(self, param, charset, strings_only=False):
-        self.smart_str = smart_str(param, charset, strings_only)
+    def __init__(self, param, cursor, strings_only=False):
+        if hasattr(param, 'bind_parameter'):
+            self.smart_str = param.bind_parameter(cursor)
+        else:
+            self.smart_str = smart_str(param, cursor.charset, strings_only)
         if hasattr(param, 'input_size'):
             # If parameter has `input_size` attribute, use that.
             self.input_size = param.input_size
@@ -344,6 +354,19 @@ class OracleParam(object):
             self.input_size = None
 
 
+class InsertIdVar(object):
+    """
+    A late-binding cursor variable that can be passed to Cursor.execute
+    as a parameter, in order to receive the id of the row created by an
+    insert statement.
+    """
+
+    def bind_parameter(self, cursor):
+        param = cursor.var(Database.NUMBER)
+        cursor._insert_id_var = param
+        return param
+
+
 class FormatStylePlaceholderCursor(object):
     """
     Django uses "format" (e.g. '%s') style placeholders, but Oracle uses ":var"
@@ -363,7 +386,7 @@ class FormatStylePlaceholderCursor(object):
         self.cursor.arraysize = 100
 
     def _format_params(self, params):
-        return tuple([OracleParam(p, self.charset, True) for p in params])
+        return tuple([OracleParam(p, self, True) for p in params])
 
     def _guess_input_sizes(self, params_list):
         sizes = [None] * len(params_list[0])

django/db/backends/postgresql_psycopg2/base.py

@@ -39,7 +39,7 @@ class DatabaseOperations(PostgresqlDatabaseOperations):
         return cursor.query
 
     def return_insert_id(self):
-        return "RETURNING %s"
+        return "RETURNING %s", ()
 
 class DatabaseWrapper(BaseDatabaseWrapper):
     operators = {

django/db/models/sql/subqueries.py

@@ -306,17 +306,20 @@ class InsertQuery(Query):
         result = ['INSERT INTO %s' % qn(opts.db_table)]
         result.append('(%s)' % ', '.join([qn(c) for c in self.columns]))
         result.append('VALUES (%s)' % ', '.join(self.values))
+        params = self.params
         if self.connection.features.can_return_id_from_insert:
             col = "%s.%s" % (qn(opts.db_table), qn(opts.pk.column))
-            result.append(self.connection.ops.return_insert_id() % col)
-        return ' '.join(result), self.params
+            r_fmt, r_params = self.connection.ops.return_insert_id()
+            result.append(r_fmt % col)
+            params = params + r_params
+        return ' '.join(result), params
 
     def execute_sql(self, return_id=False):
         cursor = super(InsertQuery, self).execute_sql(None)
         if not (return_id and cursor):
             return
         if self.connection.features.can_return_id_from_insert:
-            return cursor.fetchone()[0]
+            return self.connection.ops.fetch_returned_insert_id(cursor)
         return self.connection.ops.last_insert_id(cursor,
                 self.model._meta.db_table, self.model._meta.pk.column)