Question

问题基本上是在多层嵌入式ODocument中搜索。让我解释一下，

我有三个orientDB类 - Feedback，File和FileContent。

反馈ODocument具有对文件ODocument的嵌入式字段引用，而File具有对FileContent的嵌入式引用。

FileContent有一个字段'content'，它基本上包含我要搜索的文件的文本。

使用案例：在反馈类上编写一个选择查询，以便它为我提供具有搜索关键字的所有反馈文档。
即，
如果我想在文件内容中搜索关键字“progress”，并获取具有此关键字的所有反馈，则sql将如下所示：

从反馈中选择*，其中任何（）如'％progress％'

但是此查询不会搜索文件内容任何帮助表示赞赏。

以下是实现当前状态的示例事件序列：

orientdb {db=mydb}> create class Feedback;
orientdb {db=mydb}> create class File;
orientdb {db=mydb}> create class FileContent;
orientdb {db=mydb}> insert into FileContent (a,b) values ('Lebron James','is the King.')
orientdb {db=mydb}> select from FileContent

----+-----+------------+------------
#   |@RID |a           |b
----+-----+------------+------------
0   |#29:0|Lebron James|is the King.
----+-----+------------+------------

orientdb {db=mydb}> insert into File (c,d) values (#29:0, 'Steph Curry too!');
orientdb {db=mydb}> select from File

----+-----+-----+----------------
#   |@RID |c    |d
----+-----+-----+----------------
0   |#27:0|#29:0|Steph Curry too!
----+-----+-----+----------------

orientdb {db=mydb}> insert into Feedback (e,f) values (#27:0, 'The MVP is here.');
orientdb {db=mydb}> select from Feedback

----+-----+-----+----------------
#   |@RID |e    |f
----+-----+-----+----------------
0   |#28:0|#27:0|The MVP is here.
----+-----+-----+----------------

orientdb {db=mydb}> select from File where any() like '%Lebron%';

----+-----+-----+----------------
#   |@RID |c    |d
----+-----+-----+----------------
0   |#27:0|#29:0|Steph Curry too!
----+-----+-----+----------------

1 item(s) found. Query executed in 0.001 sec(s).
orientdb {db=mydb}> select from Feedback where any() like '%Lebron%';

0 item(s) found. Query executed in 0.001 sec(s).

// I want the last query to return the Feedback row. Is it possible?
// Also, I am not declaring the property as embedded here because then I have to do {"@type":"d", ...}

Answer 1

使用遍历语句..它将解决您的问题..但您无法获得反馈，因为您必须使用嵌入式..

List<ODocument> result = db.query(new OSQLSynchQuery<ODocument>("TRAVERSE * FROM File where any() like '%Lebron%'"));

if (result != null && result.size() > 0) {
    for (int i = 0; i < result.size(); i++) {
      System.out.println(result.get(i).field("rid"));
    }
}

这将返回File和FileContent类...

通过遍历字段

1 个答案: