ABAP Select data from SAP table GMEMF_OIDATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GMEMF_OIDATA
*  INTO TABLE @DATA(IT_GMEMF_OIDATA2).
*--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_GMEMF_OIDATA INDEX 1 INTO DATA(WA_GMEMF_OIDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GMEMF_OIDATA>-BELNR = 1.
<GMEMF_OIDATA>-BLPOS = 1.
<GMEMF_OIDATA>-FDATK = 1.
<GMEMF_OIDATA>-FIPOS = 1.
<GMEMF_OIDATA>-FISTL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GMEMF_OIDATA-GEBER, sy-vline,
  WA_GMEMF_OIDATA-FKBER, sy-vline,
  WA_GMEMF_OIDATA-GRANT_NBR, sy-vline,
  WA_GMEMF_OIDATA-MEASURE, sy-vline,
  WA_GMEMF_OIDATA-GSBER, sy-vline,
  WA_GMEMF_OIDATA-VORNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GMEMF_OIDATA 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_GMEMF_OIDATA 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_GMEMF_OIDATA INTO WA_GMEMF_OIDATA.


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

*Conversion exit FMCIS, internal->external for field FIPOS
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_GMEMF_OIDATA-FIPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GMEMF_OIDATA-FIPOS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_GMEMF_OIDATA-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GMEMF_OIDATA-VORNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_GMEMF_OIDATA-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GMEMF_OIDATA-PSPNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field REFBELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GMEMF_OIDATA-REFBELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GMEMF_OIDATA-REFBELNR.
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_GMEMF_OIDATA_STR, 
BELNR TYPE STRING,
BLPOS TYPE STRING,
FDATK TYPE STRING,
FIPOS TYPE STRING,
FISTL TYPE STRING,
GEBER TYPE STRING,
FKBER TYPE STRING,
GRANT_NBR TYPE STRING,
MEASURE TYPE STRING,
GSBER TYPE STRING,
VORNR TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
AUFNR TYPE STRING,
KOSTL TYPE STRING,
PSPNR TYPE STRING,
SAKNR TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
WAERS TYPE STRING,
HWAER TYPE STRING,
WTGES TYPE STRING,
HWGES TYPE STRING,
WTGESAPP TYPE STRING,
HWGESAPP TYPE STRING,
WTABB TYPE STRING,
HWABB TYPE STRING,
REVSUM TYPE STRING,
REVAPPSUM TYPE STRING,
STATS TYPE STRING,
ERLKZ TYPE STRING,
LOEKZ TYPE STRING,
CARRYOV TYPE STRING,
NEGVAL TYPE STRING,
PTEXT TYPE STRING,
MENGE TYPE STRING,
MEINH TYPE STRING,
MATNR TYPE STRING,
REFBLTYP TYPE STRING,
REFBELNR TYPE STRING,
REFBLPOS TYPE STRING,
XSENDER TYPE STRING,
XEMPFGR TYPE STRING,
RFPOS TYPE STRING,
WTABBANZ TYPE STRING,
HWABBANZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GMEMF_OIDATA_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_GMEMF_OIDATA_STR-BELNR sy-vline 
WA_GMEMF_OIDATA_STR-BLPOS sy-vline 
WA_GMEMF_OIDATA_STR-FDATK sy-vline 
WA_GMEMF_OIDATA_STR-FIPOS sy-vline 
WA_GMEMF_OIDATA_STR-FISTL sy-vline 
WA_GMEMF_OIDATA_STR-GEBER sy-vline 
WA_GMEMF_OIDATA_STR-FKBER sy-vline 
WA_GMEMF_OIDATA_STR-GRANT_NBR sy-vline 
WA_GMEMF_OIDATA_STR-MEASURE sy-vline 
WA_GMEMF_OIDATA_STR-GSBER sy-vline 
WA_GMEMF_OIDATA_STR-VORNR sy-vline 
WA_GMEMF_OIDATA_STR-AUFPL sy-vline 
WA_GMEMF_OIDATA_STR-APLZL sy-vline 
WA_GMEMF_OIDATA_STR-AUFNR sy-vline 
WA_GMEMF_OIDATA_STR-KOSTL sy-vline 
WA_GMEMF_OIDATA_STR-PSPNR sy-vline 
WA_GMEMF_OIDATA_STR-SAKNR sy-vline 
WA_GMEMF_OIDATA_STR-KUNNR sy-vline 
WA_GMEMF_OIDATA_STR-LIFNR sy-vline 
WA_GMEMF_OIDATA_STR-WAERS sy-vline 
WA_GMEMF_OIDATA_STR-HWAER sy-vline 
WA_GMEMF_OIDATA_STR-WTGES sy-vline 
WA_GMEMF_OIDATA_STR-HWGES sy-vline 
WA_GMEMF_OIDATA_STR-WTGESAPP sy-vline 
WA_GMEMF_OIDATA_STR-HWGESAPP sy-vline 
WA_GMEMF_OIDATA_STR-WTABB sy-vline 
WA_GMEMF_OIDATA_STR-HWABB sy-vline 
WA_GMEMF_OIDATA_STR-REVSUM sy-vline 
WA_GMEMF_OIDATA_STR-REVAPPSUM sy-vline 
WA_GMEMF_OIDATA_STR-STATS sy-vline 
WA_GMEMF_OIDATA_STR-ERLKZ sy-vline 
WA_GMEMF_OIDATA_STR-LOEKZ sy-vline 
WA_GMEMF_OIDATA_STR-CARRYOV sy-vline 
WA_GMEMF_OIDATA_STR-NEGVAL sy-vline 
WA_GMEMF_OIDATA_STR-PTEXT sy-vline 
WA_GMEMF_OIDATA_STR-MENGE sy-vline 
WA_GMEMF_OIDATA_STR-MEINH sy-vline 
WA_GMEMF_OIDATA_STR-MATNR sy-vline 
WA_GMEMF_OIDATA_STR-REFBLTYP sy-vline 
WA_GMEMF_OIDATA_STR-REFBELNR sy-vline 
WA_GMEMF_OIDATA_STR-REFBLPOS sy-vline 
WA_GMEMF_OIDATA_STR-XSENDER sy-vline 
WA_GMEMF_OIDATA_STR-XEMPFGR sy-vline 
WA_GMEMF_OIDATA_STR-RFPOS sy-vline 
WA_GMEMF_OIDATA_STR-WTABBANZ sy-vline 
WA_GMEMF_OIDATA_STR-HWABBANZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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