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ABAP/4 – Discovering Foreign Keys

A foreign key is a field in a table that is connected to another table via a foreign key relationship. The purpose of the foreign key relationship is to validate the data being entered into one table by checking against a valid set of values in another table. The table that contains the foreign key is called the foreign...

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ABAP/4 – General Data Browser Utilities

The functionality you accessed in the preceding section is just one function of a single data browser. In the R/3 system, there are four general data browser utilities: SE16, SE17, SM30, and SM31. They are similar to each other in some ways, and yet provide varying types of functionality. Using SE16 SE16 is the most...

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ABAP/4 – Changing the Data Type or Length of a Field

You can change the data type and/or length of existing fields in a table. You may wish to do this if the field length needs to be increased to hold longer values, or if the field validation rules change and the data type is no longer suitable for new data that should be entered in the field. 1. Go to the Dictionary:...

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ABAP/4 – Modifying Tables

Modifying Tables After you have created a table, you can:  - copy it  - delete it  - add more fields to it  - delete fields from it  - change the fields within it Copying a Table If a table is active in the DDIC, you can copy it. You might want to do this if the table you want to create will be very similar to...

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ABAP/4 – Naming Conventions for Tables and Their Components

Tables, data elements, and domains created at the customer site must follow SAP naming conventions for customer objects. All names are a maximum of 10 characters long. The names of all tables, domains, and data elements you create must start with the character y or z. You cannot use any other character at the beginning;...

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