从Oracle迁移到Nosql数据库

Question

I have a large code base of an online charging application that is tightly coupled to Oracle and relies extensively on SQL queries , PL/SQL procedures etc.

In case , we are to migrate to a NO SQL based DB , would all the code need to be rewritten or are there some already available libraries/drivers that do the job of translation of sql queries to no-sql queries automatically by simply having us define a mapping between the current Oracle Schema and the new underlying NO-SQL DB schema (designed afresh)?

Thanks

Answer 1

You are going to rewrite a lot of things.

Relational database and nosql "things" are so different. And nosql are not transactional, eccept for documents.

You can save money going to mysql or postgresql (suggested) but still you have to implement a lot of things and you need to study proxy, connection pooling when you need to scale.

But, you can save a lot of work with Postgres plus advanced server of enterprise db: http://www.enterprisedb.com/products-services-training/products/postgres-plus-advanced-server

They say you can switch db without a single line to be changed. And save money. Then you can access things like partitioning that will cost a lot in enterprise version of Oracle.