This is going to be a short write-up, a bonus to my previous post “Oracle Data Integrator & MapR Converged Data Platform: CHECK!“.

MapR-DB client APIs can access both HBase tables and MapR-DB tables, it all depends on what you pass to its methods. So in case you need to reverse engineer your MapR-DB tables, this blog will give you what you need.

First, you need to make sure the following jars are presented in your additional_classpath.txt OR in a separate ODI Standalone Agent which you’ll use ONLY for the purpose of reverse engineering MapR-DB:

Under HBase Physical Data Server, the physical schema values are NOT read by ODI, because (HBase 101): NoSQL databases are SCHEMALESS.

Finally, when you define your data store, under the Designer tab, you need to have slightly different value for the “Mask” property in the “Reverse” tab. So, if you want to reverse engineer HBase tables, keep things as is:

However, if you need to reverse engineer MapR-DB under a certain path, you need to modify the “Mask” value to match the path you’re aiming to reverse engineer:

In the preceding example, I reversed engineer the MapR-DB tables under the path “/user/mapr/mapr-db”:

Simple, no? If you have any questions, leave them in the comments area below.

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