ABAP Select data from SAP table GBGMP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP GBGMP 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 GBGMP. 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 GBGMP 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_GBGMP TYPE STANDARD TABLE OF GBGMP,
      WA_GBGMP TYPE GBGMP,
      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: <GBGMP> TYPE GBGMP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GBGMP
*  INTO TABLE @DATA(IT_GBGMP2).
*--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_GBGMP INDEX 1 INTO DATA(WA_GBGMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GBGMP>-AENKZ = 1.
<GBGMP>-PRTKZ = 1.
<GBGMP>-POSTX = 1.
<GBGMP>-KZMLA = 1.
<GBGMP>-SPRAS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GBGMP-KZLTX, sy-vline,
  WA_GBGMP-KZKOF, sy-vline,
  WA_GBGMP-KZKFG, sy-vline,
  WA_GBGMP-MANDT, sy-vline,
  WA_GBGMP-MGANR, sy-vline,
  WA_GBGMP-POSNM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GBGMP 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_GBGMP 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_GBGMP INTO WA_GBGMP.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_GBGMP-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GBGMP-SPRAS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field LSTNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_GBGMP-LSTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GBGMP-LSTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MSEHI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_GBGMP-MSEHI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GBGMP-MSEHI.
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_GBGMP_STR, 
AENKZ TYPE STRING,
PRTKZ TYPE STRING,
POSTX TYPE STRING,
KZMLA TYPE STRING,
SPRAS TYPE STRING,
KZLTX TYPE STRING,
KZKOF TYPE STRING,
KZKFG TYPE STRING,
MANDT TYPE STRING,
MGANR TYPE STRING,
POSNM TYPE STRING,
POSTY TYPE STRING,
PSART TYPE STRING,
LSTNR TYPE STRING,
KZITX TYPE STRING,
HPOSN TYPE STRING,
INEXCL TYPE STRING,
AKTIV TYPE STRING,
MENGE TYPE STRING,
MSEHI TYPE STRING,
DECIM TYPE STRING,
EXPON TYPE STRING,
ATVOR TYPE STRING,
ATDIM TYPE STRING,
ANZDZ TYPE STRING,
VGLZA TYPE STRING,
LVORM TYPE STRING,
CUOBJ TYPE STRING,
SORTF TYPE STRING,
DATUV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GBGMP_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_GBGMP_STR-AENKZ sy-vline 
WA_GBGMP_STR-PRTKZ sy-vline 
WA_GBGMP_STR-POSTX sy-vline 
WA_GBGMP_STR-KZMLA sy-vline 
WA_GBGMP_STR-SPRAS sy-vline 
WA_GBGMP_STR-KZLTX sy-vline 
WA_GBGMP_STR-KZKOF sy-vline 
WA_GBGMP_STR-KZKFG sy-vline 
WA_GBGMP_STR-MANDT sy-vline 
WA_GBGMP_STR-MGANR sy-vline 
WA_GBGMP_STR-POSNM sy-vline 
WA_GBGMP_STR-POSTY sy-vline 
WA_GBGMP_STR-PSART sy-vline 
WA_GBGMP_STR-LSTNR sy-vline 
WA_GBGMP_STR-KZITX sy-vline 
WA_GBGMP_STR-HPOSN sy-vline 
WA_GBGMP_STR-INEXCL sy-vline 
WA_GBGMP_STR-AKTIV sy-vline 
WA_GBGMP_STR-MENGE sy-vline 
WA_GBGMP_STR-MSEHI sy-vline 
WA_GBGMP_STR-DECIM sy-vline 
WA_GBGMP_STR-EXPON sy-vline 
WA_GBGMP_STR-ATVOR sy-vline 
WA_GBGMP_STR-ATDIM sy-vline 
WA_GBGMP_STR-ANZDZ sy-vline 
WA_GBGMP_STR-VGLZA sy-vline 
WA_GBGMP_STR-LVORM sy-vline 
WA_GBGMP_STR-CUOBJ sy-vline 
WA_GBGMP_STR-SORTF sy-vline 
WA_GBGMP_STR-DATUV sy-vline      INTO ld_text SEPARATED BY SPACE.

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