ABAP Select data from SAP table DFKK_MA_H into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DFKK_MA_H table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to DFKK_MA_H. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the DFKK_MA_H table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_DFKK_MA_H TYPE STANDARD TABLE OF DFKK_MA_H,
      WA_DFKK_MA_H TYPE DFKK_MA_H,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <DFKK_MA_H> TYPE DFKK_MA_H.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DFKK_MA_H.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DFKK_MA_H
  INTO TABLE IT_DFKK_MA_H.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKK_MA_H
*  INTO TABLE @DATA(IT_DFKK_MA_H2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_DFKK_MA_H INDEX 1 INTO DATA(WA_DFKK_MA_H2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DFKK_MA_H ASSIGNING <DFKK_MA_H>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKK_MA_H>-MANDT = 1.
<DFKK_MA_H>-MAKEY = 1.
<DFKK_MA_H>-GPART = 1.
<DFKK_MA_H>-VKONT = 1.
<DFKK_MA_H>-ERDAT = 1.

ENDLOOP.

LOOP AT IT_DFKK_MA_H INTO WA_DFKK_MA_H.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKK_MA_H-ERTIM, sy-vline,
  WA_DFKK_MA_H-ERNAM, sy-vline,
  WA_DFKK_MA_H-AEDAT, sy-vline,
  WA_DFKK_MA_H-AETIM, sy-vline,
  WA_DFKK_MA_H-AENAM, sy-vline,
  WA_DFKK_MA_H-LOEVM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKK_MA_H you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_DFKK_MA_H TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_DFKK_MA_H INTO WA_DFKK_MA_H.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field MAKEY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKK_MA_H-MAKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKK_MA_H-MAKEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKK_MA_H-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKK_MA_H-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKK_MA_H-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKK_MA_H-VKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MAALT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKK_MA_H-MAALT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKK_MA_H-MAALT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field DFSPR
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_DFKK_MA_H-DFSPR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKK_MA_H-DFSPR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DFKK_MA_H_STR, 
MANDT TYPE STRING,
MAKEY TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
AENAM TYPE STRING,
LOEVM TYPE STRING,
MABEZ TYPE STRING,
MAALT TYPE STRING,
MABEG TYPE STRING,
MAEND TYPE STRING,
TZONE TYPE STRING,
BEGRU TYPE STRING,
BUKRS TYPE STRING,
AGUID TYPE STRING,
DFSPR TYPE STRING,
TRDAT TYPE STRING,
TRTIM TYPE STRING,
MTDAT TYPE STRING,
MTTIM TYPE STRING,
MTUSR TYPE STRING,
RESTA TYPE STRING,
RETXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKK_MA_H_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_DFKK_MA_H_STR-MANDT sy-vline 
WA_DFKK_MA_H_STR-MAKEY sy-vline 
WA_DFKK_MA_H_STR-GPART sy-vline 
WA_DFKK_MA_H_STR-VKONT sy-vline 
WA_DFKK_MA_H_STR-ERDAT sy-vline 
WA_DFKK_MA_H_STR-ERTIM sy-vline 
WA_DFKK_MA_H_STR-ERNAM sy-vline 
WA_DFKK_MA_H_STR-AEDAT sy-vline 
WA_DFKK_MA_H_STR-AETIM sy-vline 
WA_DFKK_MA_H_STR-AENAM sy-vline 
WA_DFKK_MA_H_STR-LOEVM sy-vline 
WA_DFKK_MA_H_STR-MABEZ sy-vline 
WA_DFKK_MA_H_STR-MAALT sy-vline 
WA_DFKK_MA_H_STR-MABEG sy-vline 
WA_DFKK_MA_H_STR-MAEND sy-vline 
WA_DFKK_MA_H_STR-TZONE sy-vline 
WA_DFKK_MA_H_STR-BEGRU sy-vline 
WA_DFKK_MA_H_STR-BUKRS sy-vline 
WA_DFKK_MA_H_STR-AGUID sy-vline 
WA_DFKK_MA_H_STR-DFSPR sy-vline 
WA_DFKK_MA_H_STR-TRDAT sy-vline 
WA_DFKK_MA_H_STR-TRTIM sy-vline 
WA_DFKK_MA_H_STR-MTDAT sy-vline 
WA_DFKK_MA_H_STR-MTTIM sy-vline 
WA_DFKK_MA_H_STR-MTUSR sy-vline 
WA_DFKK_MA_H_STR-RESTA sy-vline 
WA_DFKK_MA_H_STR-RETXT sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.