Using Lucene like a relational database

Question

I am just wondering if we could achieve some RDBMS capabilities in lucene.

Example: 1) I have 10,000 project documents (pdf files) which have to be indexed with thei

Answer 1

I am not sure on your overall setup, but maybe Hibernate Search is for you. It would allow you to combine the benefits of a relational database with the power of a fulltext search engine like Lucene. The meta data could live in the database, maybe together with the original pdf documents, while the Lucene documents just contain the searchable data.