Creating nested tables

In this recipe, we will see how we can create a nested table. A nested table involves two internal tables, an inner and an outer table.

Before we dive into the details of creating our nested table, we will create two tables types in the ABAP dictionary. The first type ZST8_T_PERNR_ADDRESS is based on the line type shown as follows:

The table type ZST8_T_PERNR_GRADES is based on the on the line type shown as follows:

There has to be a connecting field or fields between the two. We keep the PERNR employee number as the connecting field between the two tables. We then create the interface based on ABAP dictionary type using transaction SFP.

We define two variables in the data definition, the interface EMPLOYEE_GRADES and EMPLOYEE_ADDRESS, as shown in the following screenshot:

How to do it...

We will now carry out the following steps:

1. We create a new form using the transaction SFP. The name of the form is ZST8_NESTED_TABLES_EXAMPLE based on the interface defined earlier.

   

2. Within...