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MORE ABOUT ABAP TABLES

MORE ABOUT ABAP TABLES. Fixed Domain Fields. We often want a table to have fixed field values Conceptually similar to an enumeration in .NET Create a domain as before having a data type Specify the list of valid values Make sure to activate the domain Create and activate the data element.

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MORE ABOUT ABAP TABLES

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  1. MORE ABOUT ABAP TABLES

  2. Fixed Domain Fields • We often want a table to have fixed field values • Conceptually similar to an enumeration in .NET • Create a domain as before having a data type • Specify the list of valid values • Make sure to activate the domain • Create and activate the data element

  3. Fixed Field Domains • Enter value list in the domain

  4. Fixed Field Domains

  5. Fixed Field Domains

  6. Currency Fields • Create the domain and data element using the CURR data type • Create the reference field as follows:

  7. Foreign Keys • In SAP, they are used as lookup fields for entry checks • They provide a way to limit values when there are too many to practically use domain lists

  8. Foreign Keys

  9. More Detail on Append Structures • We mentioned that append structures are used to enhance SAP and customer tables • Remember that you need an access key to modify SAP tables and the activity is risky!

  10. Append Structures (Implementation) • A table can have many append structures (modifications) • An append structure can only be used by one table though • Use the customer naming convention for append structures (leading Y or Z)

  11. Append Structures (Implementation) • Note that you must allow enhancements on the table

  12. Append Structure (Illustration)

  13. Append Structure (Creating 1)

  14. Append Structure (Creating 2)

  15. Include Structures • Use to create common data structures shared by multiple tables • Conceptually similar to a C #include • Includes should be places before appends • Be careful with includes having primary keys

  16. OpenSQL • Really a hybrid between SQL and ABAP • They add a layer between SAP and the underlying database • INSERT, UPDATE, DELETE work as expected • The MODIFY statement will UPDATE if a record exists and INSERT if not • Return code is placed in SY-SUBRC

  17. INSERT Example

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