Effective in version 10.2.2 Service Pack 1, you can sample the hierarchal data in Avro and Parquet files you add to your project as the first step in data preparation. Enterprise Data Preparation converts the Avro or Parquet file structure into a flat structure, and presents the data in a worksheet that you use to prepare the data.

For more information, see the "Prepare Data" chapter in the

Informatica 10.2.2 Service Pack 1 Enterprise Data Preparation User Guide

.