How to Append Data to an Internal Table in SAP BW/4HANA Using AMDP Code

Internal tables are data objects that store multiple records of the same structure in memory. Internal tables are often used in SAP BW/4HANA to store and process intermediate or final results of data transformations, such as lookups, calculations, aggregations, etc.

However, sometimes you may need to append data to an existing internal table from another source or target object, such as a table, a view, an InfoObject, etc. For example, you may want to combine data from different sources or targets into one internal table for further processing or analysis.

In this blog post, we will show you how to append data to an internal table in SAP BW/4HANA data loads using AMDP code. AMDP stands for ABAP Managed Database Procedures, which are database procedures written in ABAP and executed on the SAP HANA database. AMDP code can help you process and transform data faster and more efficiently than ABAP code.

Why Use AMDP Code for Appending Data to an Internal Table?

There are several reasons why you may want to use AMDP code for appending data to an internal table in SAP BW/4HANA data loads:

AMDP code can run directly on the SAP HANA database, which means it can leverage the parallel processing and in-memory capabilities of SAP HANA. This can improve the performance and scalability of your data loads.
AMDP code can access and manipulate data from different sources and targets, such as tables, views, InfoObjects, etc. This can give you more flexibility and control over your data transformations.
AMDP code can use SQLScript, which is a scripting language for SAP HANA that supports advanced features such as functions, expressions, insertions, etc. This can make your code more readable and maintainable.

How to Use AMDP Code for Appending Data to an Internal Table?

To use AMDP code for appending data to an internal table in SAP BW/4HANA data loads, you need to follow these steps:

Create an AMDP class and method that contains the logic for appending data to an internal table. You can use the example code below as a reference. The code uses the INSERT INTO statement to insert records from another source or target object into the internal table. It also checks if the input parameters are valid and returns an exception if not.

class zcl_append_itab_01 definition   public   final   create public .
  public section.
  interfaces if_amdp_marker_hdb.
  CLASS-methods APPEND_ITAB importing VALUE (IV_SOURCE) TYPE string   VALUE (IV_TARGET) TYPE string   VALUE (IT_ITAB) TYPE any table   exporting VALUE (ET_ITAB) TYPE any table   exceptions INVALID_INPUT.
  protected section.
  private section.
endclass.

class zcl_append_itab_01 implementation.
  method APPEND_ITAB by database procedure   for hdb   language sqlscript.
    declare lv_source varchar(30);
    declare lv_target varchar(30);
    -- If the input parameters are not initial
    IF :IV_SOURCE IS NOT NULL AND :IV_TARGET IS NOT NULL then
      -- Assign the input parameters to local variables
      lv_source := :IV_SOURCE;
      lv_target := :IV_TARGET;
      -- Insert records from the source object into the internal table
      INSERT INTO :IT_ITAB SELECT * FROM :lv_source;
      -- Insert records from the target object into the internal table
      INSERT INTO :IT_ITAB SELECT * FROM :lv_target;
      -- Assign the output parameter
      ET_ITAB := :IT_ITAB;
    -- If the input parameters are initial
    ELSE
      -- Raise an exception
      SIGNAL INVALID_INPUT SET MESSAGE_TEXT = 'Invalid input parameters';
    END IF;
  endmethod.
endclass.

class zcl_append_itab_01 definition public final create public .

public section.

interfaces if_amdp_marker_hdb.

CLASS-methods APPEND_ITAB importing VALUE (IV_SOURCE) TYPE string VALUE (IV_TARGET) TYPE string VALUE (IT_ITAB) TYPE any table exporting VALUE (ET_ITAB) TYPE any table exceptions INVALID_INPUT.

protected section.

private section.

endclass.

class zcl_append_itab_01 implementation.

method APPEND_ITAB by database procedure for hdb language sqlscript.

declare lv_source varchar(30);

declare lv_target varchar(30);

-- If the input parameters are not initial

IF :IV_SOURCE IS NOT NULL AND :IV_TARGET IS NOT NULL then

-- Assign the input parameters to local variables

lv_source := :IV_SOURCE;

lv_target := :IV_TARGET;

-- Insert records from the source object into the internal table

INSERT INTO :IT_ITAB SELECT * FROM :lv_source;

-- Insert records from the target object into the internal table

INSERT INTO :IT_ITAB SELECT * FROM :lv_target;

-- Assign the output parameter

ET_ITAB := :IT_ITAB;

-- If the input parameters are initial

ELSE

-- Raise an exception

SIGNAL INVALID_INPUT SET MESSAGE_TEXT = 'Invalid input parameters';

END IF;

endmethod.

endclass.

Create a transformation that uses the AMDP class and method for appending data to an internal table. You can use the transformation editor in SAP BW/4HANA to create a transformation between your source and target objects. In the transformation, you need to call the AMDP method with the appropriate parameters. You can use the example code below as a reference. The code passes the source object name, the target object name, and an empty internal table as parameters to the AMDP method and assigns the output value to a local variable.

METHOD START_ROUTINE.
  DATA: lv_source TYPE string,
        lv_target TYPE string,
        lt_itab TYPE STANDARD TABLE OF _ty_s_TG_1,
        lt_result LIKE lt_itab.
  lv_source = 'ZSOURCE'. "The source object name
  lv_target = 'ZTARGET'. "The target object name
  CLEAR lt_itab. "The empty internal table
ENDMETHOD.

METHOD END_ROUTINE.
  CALL METHOD zcl_append_itab_01=>APPEND_ITAB
    EXPORTING
      IV_SOURCE = lv_source
      IV_TARGET = lv_target
      IT_ITAB   = lt_itab
    IMPORTING
      ET_ITAB   = lt_result
    EXCEPTIONS
      INVALID_INPUT = 1.
  IF sy-subrc <> 0.
    "Handle the exception
  ENDIF.
  "Do something with the result internal table
ENDMETHOD.

METHOD START_ROUTINE.

DATA: lv_source TYPE string,

lv_target TYPE string,

lt_itab TYPE STANDARD TABLE OF _ty_s_TG_1,

lt_result LIKE lt_itab.

lv_source = 'ZSOURCE'. "The source object name

lv_target = 'ZTARGET'. "The target object name

CLEAR lt_itab. "The empty internal table

ENDMETHOD.

METHOD END_ROUTINE.

CALL METHOD zcl_append_itab_01=>APPEND_ITAB

EXPORTING

IV_SOURCE = lv_source

IV_TARGET = lv_target

IT_ITAB = lt_itab

IMPORTING

ET_ITAB = lt_result

EXCEPTIONS

INVALID_INPUT = 1.

IF sy-subrc <> 0.

"Handle the exception

ENDIF.

"Do something with the result internal table

ENDMETHOD.

Execute the data load and check the results. You can use the InfoPackage or the Data Transfer Process (DTP) to execute the data load from your source object to your target object. You can also monitor the data load status and logs in SAP BW/4HANA. After the data load is completed, you can check the results in your internal table and verify that the data is appended correctly.

Conclusion

In this blog post, we have shown you how to append data to an internal table in SAP BW/4HANA data loads using AMDP code. AMDP code can help you improve the performance, flexibility, and readability of your data transformations. We hope you find this blog post useful and informative. If you have any questions or feedback, please feel free to leave a comment below.

Disclaimer: This content is generated by AI.