添加装修返利大类不重复添加

src/custom/restcontroller/webmanage/sale/rebatescheme/SQL/装修返利方案大类新增.sql

@@ -1,2 +1,8 @@
 insert into sa_rebatecategory (siteid, sa_rebatecategoryid,sa_rebateschemeid,itemclassid)
-values ($siteid$, $sa_rebatecategoryid$,$sa_rebateschemeid$,$itemclassid$);
+select $siteid$, $sa_rebatecategoryid$,$sa_rebateschemeid$,$itemclassid$
+FROM dual
+WHERE not exists(SELECT 1
+                 FROM sa_rebatecategory
+                 WHERE siteid = $siteid$
+                   and itemclassid = $itemclassid$
+                   )