性能优化

@@ -23,7 +23,7 @@
     <select id="selectByTypeAndOrderCode" resultMap="BaseResultMap">
         select <include refid="Base_Column_List"></include> 
         from order_operate_record 
-        where type=#{type} and order_code=#{orderCode} 
+        where type=#{type} and order_code=CAST(#{orderCode}  AS CHAR)
         limit 1
     </select>