性能调优

@@ -40,7 +40,7 @@
     <select id="selectInboxs" resultMap="BaseResultMap">
         SELECT
         <include refid="Base_Column_List"/>
-        FROM ${tableName} where uid = #{uid} and is_del='N'
+        FROM ${tableName}  force index(`read`) where uid = #{uid} and is_del='N'
         <if test="type != null">
             and type=#{type}
         </if>