Question

我正在开发一个连接到documentum的Java项目。我试图使用以下内容从我的dm_acl对象表中获取一些数据：

String fetchAclsInfoQuery = "select * from dm_acl where description = '@aclname0' or description = '@aclname1' or description = '@aclname2' enable (ROW_BASED) ";
            fetchAclsInfoQuery = fetchAclsInfoQuery.replace("@aclname0", list.get(0));
            fetchAclsInfoQuery = fetchAclsInfoQuery.replace("@aclname1", newAcl1.toString().toLowerCase());
            fetchAclsInfoQuery = fetchAclsInfoQuery.replace("@aclname2", newAcl2.toString().toLowerCase());
            System.out.println(fetchAclsInfoQuery);

//The problem starts from here  ==> 
            IDfQuery aclDetailsFetching = new DfQuery();
            //IDfCollection col = UpdateQuery.execute(_session, IDfQuery.DF_QUERY);
            IDfCollection details = aclDetailsFetching.execute(_session, DfQuery.DF_READ_QUERY);
            while(details.next()){
                System.out.println(details.getString("owner_name"));
            }

一旦我打印出“fetchAclsInfoQuery”的结果并在DQL测试器中运行它，它完全正常，当我尝试输出存储在“owner_name”列中的值时，我得到的只是null。知道我的错误在哪里？：）

Answer 1

您忘记将DQL语句设置为查询对象添加<?php echo '<?xml version="1.0" encoding="UTF-8"?>'; ?> <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"> <url> <loc>http://www.example.com/</loc> <lastmod>2005-01-01</lastmod> <changefreq>monthly</changefreq> <priority>0.8</priority> </url> </urlset>

Answer 2

尝试写作

String fetchAclsInfoQuery = "select owner_name from dm_acl where description = '@aclname0' or description = '@aclname1' or description = '@aclname2' enable (ROW_BASED) ";

而不是

String fetchAclsInfoQuery = "select * from dm_acl where description = '@aclname0' or description = '@aclname1' or description = '@aclname2' enable (ROW_BASED) ";

我很确定星号而不是真实的属性名称存在问题。您可以使用方法hasAttr("<attribute_name>")来检查您在集合中加载了所需的属性（属性）。

从documentum（dm_acl对象表）获取的数据结果为空？为什么呢？

2 个答案: