Create an ABAP Table Type

1. Open your ABAP Project or ABAP Cloud Project from the previous tutorial, then open the package in which you created the database table.

2. Select your package and choose New > Other ABAP Repository Object > Dictionary > Table Type from the context menu.

   

3. Enter a name and description and choose Next.

   

4. Create or assign a transport request and choose Finish.

The table type appears in a new editor.

Choose the category Dictionary Type For the type name, choose the database table you created in a previous tutorial, for example Z_BOOKING_XXX (replacing XXX with your group number or initials).

Enter the exact name. The Browse function may not work in some environments.

In the ABAP Environment, you can only work with whitelisted objects. The majority of tables you might expect, such as SFLIGHT are not whitelisted. For a complete list of whitelisted objects, see the folder Released Objects. To sort objects by object type, not package, use a Duplicate Tree

In ABAP on-premise systems, this is not an issue.

1. You cannot define your own primary key for a standard table. First, change the access type to Sorted Table.

   

2. Change the Primary Key type to Key Components.

   

3. You can now choose the key fields from a drop-down list, by choosing Auto-complete (Ctrl+Space).

   

4. Choose each key field in turn, using Auto-complete (Ctrl+Space):

   

This is for test purposes only. The access type you choose in real life affects performance. For more information, see:

• ABAP Keyword Documentation: Internal Tables, Selection of Table Category

• ABAP Examples: Internal Tables, Key Accesses

Users may want to query a database table using something other than the primary key. To enable this, create a secondary key.

1. First, select Secondary Key and choose Create… from the context menu:

   

2. Enter a name and choose the component(s) (or fields):

   

The keys are listed.

Finally, you will test your table type by using it to:

• define an internal table
• get database data into this table
• output the table content to the console

1. First create the ABAP Class, by selecting your package and choosing New > ABAP Class from the context menu:

   

2. Enter a name ZCL_GET_ACCOUNT_DATA_XXX and description for your class (replacing XXX with your group number or initials).

   

3. Assign a transport request and choose Finish.

The class appears in a new editor.

1. Add the following interface to your class:
   ABAP

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    interfaces if_oo_adt_classrun.
   

This interface provides a light-weight solution for executing an ABAP program without launching a full user interface.
It also lets you display text or data in the Console View.

1. Add the implementation for the main method of this interface by selecting the interface name and choosing Add implementation… from the context menu.
   

You will now add the following code to the main method, remembering to rename the table type and database table to your own (for example, replacing XXX with your group number or initials)..

1. Create an internal table lt_accounts with the table type that you just created, ZTT_ACCOUNTS_XXX.
   ABAP

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   DATA: lt_accounts type ZTT_ACCOUNTS_XXX.
   

2. Select data from the database table from the previous tutorial ZTBOOKING_XXX and add it to the internal table.
   ABAP

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   select * from ZACCOUNTS_XXX
   into table @lt_accounts.
   

3. Output the internal table to the console.

   ABAP

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   out->write( EXPORTING
   data = lt_accounts
   name = 'Accounts:' ).
   

4. Then save and activate your class using Ctrl+S, Ctrl+F3.

The complete class should look like this:

CLASS zcl_get_account_data_xxx DEFINITION
  PUBLIC
  FINAL
  CREATE PUBLIC .

  PUBLIC SECTION.
    INTERFACES if_oo_adt_classrun.
  PROTECTED SECTION.
  PRIVATE SECTION.
ENDCLASS.

CLASS zcl_get_account_data_xxx IMPLEMENTATION.
  METHOD if_oo_adt_classrun~main.
    DATA: lt_accounts type ZTT_ACCOUNTS_XXX.

    select * from ZACCOUNTS_XXX
    into table @lt_accounts.

    out->write( EXPORTING
    data = lt_accounts
    name = 'Accounts:' ).

  ENDMETHOD.
ENDCLASS.

Run your class in the console by choosing F9. Your output should look like this: