修改

src/main/java/com/pms/ocp/mapper/OcpTenantExtentMapper.java

@@ -6,4 +6,10 @@ import org.apache.ibatis.annotations.Mapper;
 
 @Mapper
 public interface OcpTenantExtentMapper extends  BaseMapper<OcpTenantExtent>{
+    /**
+     *
+     * @param appCode
+     * @return
+     */
+    int queryCount(String appCode);
 }

src/main/java/com/pms/ocp/service/impl/AppRegisterServiceImpl.java

@@ -50,8 +50,9 @@ public class AppRegisterServiceImpl implements AppRegisterService {
     public ResponseVO addApp(AppRegisterDTO appRegisterDTO) {
 
         int count = ocpTenantBaseMapper.queryCount(appRegisterDTO.getAppCode());
-        if (count != 0) {
-            return ResponseVO.error("应用编码有重复");
+        int c = ocpTenantExtentMapper.queryCount(appRegisterDTO.getAppCode());
+        if (count != 0 || c != 0) {
+            return ResponseVO.error("应用编码有重复/应用扩展表编码有重复");
         }
 
         OcpTenantIocn ocpTenantIocn = new OcpTenantIocn();

src/main/resources/mapper/OcpTenantExtentMapper.xml

+<?xml version="1.0" encoding="utf-8" ?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
+<mapper namespace="com.pms.ocp.mapper.OcpTenantExtentMapper">
+
+    <select id="queryCount" resultType="java.lang.Integer">
+        select count(0)
+        from ocp_tenant_extent
+        where tenant_code = #{appCode}
+    </select>
+</mapper>