在Solr中使用数据导入处理程序索引Mysql数据库

我想使用数据导入处理程序在solr中索引mysql数据库

我做了两张桌子。第一个表保存文件的元数据

create table filemetadata (
id varchar(20) primary key ,
filename varchar(50),
path varchar(200),
size varchar(10),
author varchar(50)
) ;

+-------+-------------+---------+------+---------+
| id    | filename    | path    | size | author  | 
+-------+-------------+---------+------+---------+
| 1     | abc.txt     | c:\files| 2kb  | eric    | 
+-------+-------------+---------+------+---------+
| 2     | xyz.docx    | c:\files| 5kb  | john    | 
+-------+-------------+---------+------+---------+
| 3     | pqr.txt     |c:\files | 10kb | mike    | 
+-------+-------------+---------+------+---------+

第二个表包含关于上表中特定文件的“收藏夹”信息

create table filefav (
fid varchar(20) primary key ,
id varchar(20),
favouritedby varchar(300),
favouritedtime varchar(10),
FOREIGN KEY (id) REFERENCES filemetadata(id) 
) ;

+--------+------+-----------------+----------------+
| fid    | id   | favouritedby    | favouritedtime | 
+--------+------+-----------------+----------------+
| 1      | 1    | ross            | 22:30          | 
+--------+------+-----------------+----------------+
| 2      | 1    | josh            | 12:56          | 
+--------+------+-----------------+----------------+
| 3      | 2    | johny           | 03:03          | 
+--------+------+-----------------+----------------+
| 4      | 2    | sean            | 03:45          | 
+--------+------+-----------------+----------------+

这里“id”是一个外键。第二个表显示了哪个人将哪个文档标记为他/她的最爱。例如，由id=1表示的abc.txt文件被ross和josh标记为最爱（见FavoritedBy列）

我想按如下方式索引这些文件：

每个文档应具有以下字段

id       - to be taken from the first table filemetadata
filename - to be taken from the first table filemetadata
path     - to be taken from the first table filemetadata
size     - to be taken from the first table filemetadata
author   - to be taken from the first table filemetadata
Favouritedby - this field should contain the names of all the people from table 2 filefav (from the favouritedby column) who like that particular file.

例如，索引文档1后应具有

id = 1
filename = abc.txt
path = c:\files
size = 2kb
author = eric
favourited by - ross , josh 

我如何做到这一点

我编写了一个data-config.xml（它没有给出期望的结果），如下所示

<dataConfig>
<dataSource type="JdbcDataSource" driver="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost:3306/test" user="root" password="root" /> 
<document name="filemetadata">

<entity name="restaurant" query="select * from filemetadata">
<field column="id" name="id" /> 

 <entity name="filefav" query="select favouritedby from filefav where id=${filemetadata.id}">
<field column="favouritedby" name="favouritedby1" />
</entity>

<field column="filename" name="name1" /> 
<field column="path" name="path1" /> 
<field column="size" name="size1" /> 
<field column="author" name="author1" />  

</entity>
</document>
</dataConfig>

---

有人能解释一下我是如何做到这一点的吗？

当前结果的问题到底是什么？不必写下两个单独的查询，您可以进行连接并获得所有结果。在获得所有结果后，请在schema.xml中提及这些字段以建立索引并保留“id”“在唯一键中。我使用了连接，现在一切都很正常。谢谢