处理sql为null的情况；

src/main/resources/mapper/hmhj/EntrustSampleItemMapper.xml

@@ -345,8 +345,8 @@
             i.tester,
             o.org_name,
             sum(case when i.status = 50 then 1 else 0 end ) "finish_num",
-            sum(case when i.status = 20 and ii.fill_num > 0 then 1 else 0 end ) "testing_num",
-            sum(case when i.status = 20 and ii.fill_num = 0 then 1 else 0 end ) "untest_num",
+            sum(case when i.status = 20 and coalesce (ii.fill_num,0) > 0 then 1 else 0 end ) "testing_num",
+            sum(case when i.status = 20 and coalesce (ii.fill_num,0) = 0 then 1 else 0 end ) "untest_num",
             sum(case when i.status = 50 and e.priority = '加急' then 1 else 0 end ) "urgent_finish_num",
             sum(case when i.status != 50 and e.priority = '加急' then 1 else 0 end ) "urgent_unfinish_num"