ABAP Select data from SAP table OIIGMMK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIIGMMK
*  INTO TABLE @DATA(IT_OIIGMMK2).
*--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_OIIGMMK INDEX 1 INTO DATA(WA_OIIGMMK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIIGMMK>-MANDT = 1.
<OIIGMMK>-GMMNR = 1.
<OIIGMMK>-OBJNR = 1.
<OIIGMMK>-GMMTYP = 1.
<OIIGMMK>-EQUNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIIGMMK-TPLNR, sy-vline,
  WA_OIIGMMK-HERST, sy-vline,
  WA_OIIGMMK-HERLD, sy-vline,
  WA_OIIGMMK-SERGE, sy-vline,
  WA_OIIGMMK-TYPBZ, sy-vline,
  WA_OIIGMMK-BAUJJ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIIGMMK 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_OIIGMMK 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_OIIGMMK INTO WA_OIIGMMK.


*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 GMMNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIIGMMK-GMMNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIIGMMK-GMMNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_OIIGMMK-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIIGMMK-TPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VOLUN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIIGMMK-VOLUN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIIGMMK-VOLUN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MASUN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIIGMMK-MASUN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIIGMMK-MASUN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LENUN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIIGMMK-LENUN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIIGMMK-LENUN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_OIIGMMK-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIIGMMK-MATNR.
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_OIIGMMK_STR, 
MANDT TYPE STRING,
GMMNR TYPE STRING,
OBJNR TYPE STRING,
GMMTYP TYPE STRING,
EQUNR TYPE STRING,
TPLNR TYPE STRING,
HERST TYPE STRING,
HERLD TYPE STRING,
SERGE TYPE STRING,
TYPBZ TYPE STRING,
BAUJJ TYPE STRING,
BAUMM TYPE STRING,
VOLUN TYPE STRING,
MASUN TYPE STRING,
LENUN TYPE STRING,
NRDIG TYPE STRING,
NRDPL TYPE STRING,
CONFAC TYPE STRING,
MATNR TYPE STRING,
RECDAT TYPE STRING,
RECTIM TYPE STRING,
STCOUN TYPE STRING,
SERVTYP TYPE STRING,
QMET_IND TYPE STRING,
MATSWITCH TYPE STRING,
ERDAT TYPE STRING,
ERZEIT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AEZEIT TYPE STRING,
AENAM TYPE STRING,
BLOIND TYPE STRING,
DELIND TYPE STRING,
LAST_RDG_CHK TYPE STRING,
ST_MTR_RT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIIGMMK_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_OIIGMMK_STR-MANDT sy-vline 
WA_OIIGMMK_STR-GMMNR sy-vline 
WA_OIIGMMK_STR-OBJNR sy-vline 
WA_OIIGMMK_STR-GMMTYP sy-vline 
WA_OIIGMMK_STR-EQUNR sy-vline 
WA_OIIGMMK_STR-TPLNR sy-vline 
WA_OIIGMMK_STR-HERST sy-vline 
WA_OIIGMMK_STR-HERLD sy-vline 
WA_OIIGMMK_STR-SERGE sy-vline 
WA_OIIGMMK_STR-TYPBZ sy-vline 
WA_OIIGMMK_STR-BAUJJ sy-vline 
WA_OIIGMMK_STR-BAUMM sy-vline 
WA_OIIGMMK_STR-VOLUN sy-vline 
WA_OIIGMMK_STR-MASUN sy-vline 
WA_OIIGMMK_STR-LENUN sy-vline 
WA_OIIGMMK_STR-NRDIG sy-vline 
WA_OIIGMMK_STR-NRDPL sy-vline 
WA_OIIGMMK_STR-CONFAC sy-vline 
WA_OIIGMMK_STR-MATNR sy-vline 
WA_OIIGMMK_STR-RECDAT sy-vline 
WA_OIIGMMK_STR-RECTIM sy-vline 
WA_OIIGMMK_STR-STCOUN sy-vline 
WA_OIIGMMK_STR-SERVTYP sy-vline 
WA_OIIGMMK_STR-QMET_IND sy-vline 
WA_OIIGMMK_STR-MATSWITCH sy-vline 
WA_OIIGMMK_STR-ERDAT sy-vline 
WA_OIIGMMK_STR-ERZEIT sy-vline 
WA_OIIGMMK_STR-ERNAM sy-vline 
WA_OIIGMMK_STR-AEDAT sy-vline 
WA_OIIGMMK_STR-AEZEIT sy-vline 
WA_OIIGMMK_STR-AENAM sy-vline 
WA_OIIGMMK_STR-BLOIND sy-vline 
WA_OIIGMMK_STR-DELIND sy-vline 
WA_OIIGMMK_STR-LAST_RDG_CHK sy-vline 
WA_OIIGMMK_STR-ST_MTR_RT sy-vline      INTO ld_text SEPARATED BY SPACE.

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