Delta load

The delta load process extracts only that data which has changed since the last time a build was run. The delta load process is used for extracting data for the operational data store of IBM® Rational® Insight data warehouse. This topic is an overview of the delta load implementation.
To run the delta load process, you need to store the date and time of the last successful build of the extract, transform, and load (ETL) process. The CONFIG.ETL_INFO table in the data warehouse is defined for this purpose. Every time an ETL job is run, some variables are initialized. For the delta load process, the following two variables are used:

Whether the delta load process works for a specific product or not depends upon the data service through which the product data is extracted.


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