来自多个数据库表的Solr数据导入处理程序

Question

I have a problem in importing data using data import handler in Solr from multiple database tables residing on completely different databases. One table is from an on premise oracle database and the other is from an Oracle RDS cloud database.

My data import handler query is:

select 
  emp.eid, emp.ename, dept.deptid, dept.dname
from 
  emp inner join dept on emp.deptid = dept.deptid

Now this dept table is moved to another database.

In this scenario how can I index the data from multiple database tables.

Answer 1

This is not really a problem that Solr will help you to solve. You should tackle this with an Oracle Database Link . You need to create the database link within the database server that wants to connect to the dept table. After that create a view or materialized view within the database with the link for Solr to fetch the data from. That view should use the query that you have shown to us, with small changes due to the natuer of database links. Then you can create a dataimport handler within Solr to fetch and import your data from that view. Solr shouldn't need to know that there is more than one database server involved.

If you have trouble doing this, head over to oracle