专题广告，查询sql错误修改

src/main/resource/mapper/AdSpecialMapper.xml

@@ -44,7 +44,7 @@
               OR position(#{queryBean.keyword} in COALESCE(a.adv_master,'')) > 0 OR position(#{queryBean.keyword} in COALESCE(a.tv_name,'')) > 0)
           </if>
           <if test="queryBean.mediaName != null and queryBean.mediaName != ''">
-              AND a.mediaName= #{queryBean.mediaName}
+              AND a.media_name= #{queryBean.mediaName}
           </if>  
           <if test="queryBean.showEnv != null">
               AND a.show_env= #{queryBean.showEnv}