[update] 实时监控->解决查询bug

signal-optimize-service/src/main/resources/mapper/strategy/SceneStrategyIdeaMapper.xml

@@ -38,7 +38,7 @@
         where scene_id = #{sceneId} and strategy_id = #{strategyId}
     </select>
 
-    <select id="selectIdBySceneNum">
+    <select id="selectIdBySceneNum" resultType="Integer">
         select
             max( id )
         from