Fixes #4612

lib/utils/sqlalchemy.py

@@ -101,13 +101,22 @@ class SQLAlchemy(GenericConnector):
             return None
 
     def execute(self, query):
+        retVal = False
+
         try:
             self.cursor = self.connector.execute(query)
+            retVal = True
         except (_sqlalchemy.exc.OperationalError, _sqlalchemy.exc.ProgrammingError) as ex:
             logger.log(logging.WARN if conf.dbmsHandler else logging.DEBUG, "(remote) %s" % getSafeExString(ex))
         except _sqlalchemy.exc.InternalError as ex:
             raise SqlmapConnectionException(getSafeExString(ex))
 
+        return retVal
+
     def select(self, query):
-        self.execute(query)
-        return self.fetchall()
+        retVal = None
+
+        if self.execute(query):
+            retVal = self.fetchall()
+
+        return retVal