Introducing Rollup

Simple rollup transform

Rollup is a general transformation component introduced in CloverETL version 2.8. It serves as an executor of rollup transformations written in Java or CTL. Basically, rollup transformations are used to process groups of data records. Each group consisting of M data records may be used to output N different data records. The number of output data records is determined at runtime within the rollup transformation. If no group key is defined, all input data records belong to a single group.[Continue reading]

The Beauty of Inline CTL Expressions

Have you ever wondered how to write data records to a file with current date in its name? Then I've got a brand new solution for you! Since version 2.8, CloverETL supports inline CTL expressions within graph attributes and parameters. What does that mean? It means that you can use attributes and parameters containing CTL expressions which are evaluated dynamically at run-time![Continue reading]