fixbugs

@@ -98,7 +98,7 @@
     select #{id,jdbcType=INTEGER}, #{uid,jdbcType=INTEGER}, #{couponId,jdbcType=INTEGER},
     #{couponType,jdbcType=INTEGER}, #{couponCode,jdbcType=VARCHAR}, #{status,jdbcType=INTEGER},
     #{orderCode,jdbcType=BIGINT}, #{useTime,jdbcType=INTEGER}, #{startTime,jdbcType=INTEGER},
-    #{endTime,jdbcType=INTEGER}, #{createTime,jdbcType=INTEGER}, #{couponToken,jdbcType=VARCHAR} from user_coupon
+    #{endTime,jdbcType=INTEGER}, #{createTime,jdbcType=INTEGER}, #{couponToken,jdbcType=VARCHAR} from dual
     where not EXISTS (select 1 from user_coupon where uid=#{uid,jdbcType=INTEGER} and coupon_token=#{couponToken,jdbcType=VARCHAR})
   </insert>