优惠券发放记录分页查询sql优化

@@ -58,6 +58,7 @@ public class BatchService {
     static {
         // 基础商品导出限制两万
         EXPORT_NUM_LIMIT_MAP.put("baseProduce", 20000);
+        EXPORT_NUM_LIMIT_MAP.put("couponServiceImpl", 100000);
     }
 
     @Value("${file.saveDir}")

@@ -21,23 +21,28 @@
     </sql>
     <select id="selectByCondition" resultType="com.yoho.ufo.model.coupon.UserCoupon">
         select <include refid="Base_Column_List"/> from user_coupon
-        where 1=1
-        <if test="param.couponId != null">
-            and coupon_Id=#{param.couponId}
-        </if>
-        <if test="param.couponCode != null">
-             and coupon_code=#{param.couponCode}
-        </if>
-        <if test="param.uid != null">
-            and uid=#{param.uid}
-        </if>
-        <if test="param.status != null">
-            and status=#{param.status}
-        </if>
-        order by id desc
-        <if test="param.size > 0">
-            limit #{param.start},#{param.size}
-        </if>
+        inner join (
+            select id from user_coupon
+            <where>
+                <if test="param.couponId != null">
+                    and coupon_Id=#{param.couponId}
+                </if>
+                <if test="param.couponCode != null">
+                    and coupon_code=#{param.couponCode}
+                </if>
+                <if test="param.uid != null">
+                    and uid=#{param.uid}
+                </if>
+                <if test="param.status != null">
+                    and status=#{param.status}
+                </if>
+            </where>
+            order by id desc
+            <if test="param.size > 0">
+                limit #{param.start},#{param.size}
+            </if>
+            )
+        a using(id)
     </select>
     <select id="selectTotalByCondition" resultType="java.lang.Integer">
         select count(1) from user_coupon