In this section we will show how to control the various schemes that the add-in offers to bridge the gap with relational SQL and nested Parquet services. The CData Excel Add-In for Parquet provides a managed way for you to use the two prevailing techniques for dealing with nested Parquet data:

• Parsing the data structure and building a relational model based on the existing hierarchy.
• Drilling down into the nested arrays and objects using horizontal flattening.

Parsing Hierarchical Data

By default, the add-in automatically detects the rows in a document, so that you do not need to know the structure of the underlying data to query it with SQL. Set the DataModel property to choose a basic configuration of how the add-in models object arrays into tables. Set the FlattenObjects and FlattenArrays properties to configure how nested data is flattened into columns. See Parsing Hierarchical Data for a guide.