ABAP Select data from SAP table IFMSAMDISPLAYFLDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IFMSAMDISPLAYFLDS
*  INTO TABLE @DATA(IT_IFMSAMDISPLAYFLDS2).
*--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_IFMSAMDISPLAYFLDS INDEX 1 INTO DATA(WA_IFMSAMDISPLAYFLDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IFMSAMDISPLAYFLDS>-LIFNR = 1.
<IFMSAMDISPLAYFLDS>-MANDT = 1.
<IFMSAMDISPLAYFLDS>-SAM_UE_ID = 1.
<IFMSAMDISPLAYFLDS>-SAM_EFT_IND = 1.
<IFMSAMDISPLAYFLDS>-DUNS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IFMSAMDISPLAYFLDS-CAGE, sy-vline,
  WA_IFMSAMDISPLAYFLDS-DODAAC, sy-vline,
  WA_IFMSAMDISPLAYFLDS-PUR_REG_CODE, sy-vline,
  WA_IFMSAMDISPLAYFLDS-REGSTAT, sy-vline,
  WA_IFMSAMDISPLAYFLDS-REGDATE, sy-vline,
  WA_IFMSAMDISPLAYFLDS-EXPDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IFMSAMDISPLAYFLDS 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_IFMSAMDISPLAYFLDS 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_IFMSAMDISPLAYFLDS INTO WA_IFMSAMDISPLAYFLDS.


*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 LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IFMSAMDISPLAYFLDS-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFMSAMDISPLAYFLDS-LIFNR.
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_IFMSAMDISPLAYFLDS_STR, 
LIFNR TYPE STRING,
MANDT TYPE STRING,
SAM_UE_ID TYPE STRING,
SAM_EFT_IND TYPE STRING,
DUNS TYPE STRING,
CAGE TYPE STRING,
DODAAC TYPE STRING,
PUR_REG_CODE TYPE STRING,
REGSTAT TYPE STRING,
REGDATE TYPE STRING,
EXPDATE TYPE STRING,
LASTUPDATE TYPE STRING,
ACTDATE TYPE STRING,
BUSNAME TYPE STRING,
DBANAME TYPE STRING,
DBOPENDATAFLG TYPE STRING,
SOURCE TYPE STRING,
DEPARTMENT_CODE TYPE STRING,
HIER_DEP_CODE TYPE STRING,
HIER_DEP_NAME TYPE STRING,
HIER_AGCY_CODE TYPE STRING,
HIER_AGCY_NAME TYPE STRING,
HIER_OFFICE_CODE TYPE STRING,
TAXPAYERNAME TYPE STRING,
TAXIDTYPE TYPE STRING,
TAXID TYPE STRING,
URL TYPE STRING,
DIVNAME TYPE STRING,
DIVNUM TYPE STRING,
BUSSTART TYPE STRING,
FISCEND TYPE STRING,
AGCY_BUS_PUR TYPE STRING,
ENTSTRUCT TYPE STRING,
STATEINC TYPE STRING,
COUNTRYINC TYPE STRING,
COSECLVL TYPE STRING,
EMSECLVL TYPE STRING,
PRIMARY_NAICS TYPE STRING,
REVENUE TYPE STRING,
EMPLNUM TYPE STRING,
LOCREVENUE TYPE STRING,
LOCEMPLNUM TYPE STRING,
FININST TYPE STRING,
ACCNTNO TYPE STRING,
ABAROUTE TYPE STRING,
ACCNTYP TYPE STRING,
LOCKBOX TYPE STRING,
AUTHDATE TYPE STRING,
EFTWAIVER TYPE STRING,
MERCHANTID1 TYPE STRING,
MERCHANTID2 TYPE STRING,
ACCNT_STATION TYPE STRING,
EDI TYPE STRING,
EDIVAN TYPE STRING,
EDIISAQ TYPE STRING,
EDIISASQ TYPE STRING,
EDIGS02 TYPE STRING,
EDIREC820 TYPE STRING,
EVSMLASTUPD TYPE STRING,
EVSMSTATUS TYPE STRING,
EVSOUTOFBUS TYPE STRING,
CREDCARD TYPE STRING,
CORRFLAG TYPE STRING,
MPIN TYPE STRING,
DEBTOFFSET TYPE STRING,
EXCLSTATFLAG TYPE STRING,
ANNUAL_IGT_REV TYPE STRING,
XUSNAM TYPE STRING,
XDATE TYPE STRING,
XTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IFMSAMDISPLAYFLDS_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_IFMSAMDISPLAYFLDS_STR-LIFNR sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-MANDT sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-SAM_UE_ID sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-SAM_EFT_IND sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-DUNS sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-CAGE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-DODAAC sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-PUR_REG_CODE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-REGSTAT sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-REGDATE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EXPDATE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-LASTUPDATE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-ACTDATE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-BUSNAME sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-DBANAME sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-DBOPENDATAFLG sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-SOURCE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-DEPARTMENT_CODE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-HIER_DEP_CODE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-HIER_DEP_NAME sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-HIER_AGCY_CODE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-HIER_AGCY_NAME sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-HIER_OFFICE_CODE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-TAXPAYERNAME sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-TAXIDTYPE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-TAXID sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-URL sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-DIVNAME sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-DIVNUM sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-BUSSTART sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-FISCEND sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-AGCY_BUS_PUR sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-ENTSTRUCT sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-STATEINC sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-COUNTRYINC sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-COSECLVL sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EMSECLVL sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-PRIMARY_NAICS sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-REVENUE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EMPLNUM sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-LOCREVENUE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-LOCEMPLNUM sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-FININST sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-ACCNTNO sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-ABAROUTE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-ACCNTYP sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-LOCKBOX sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-AUTHDATE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EFTWAIVER sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-MERCHANTID1 sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-MERCHANTID2 sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-ACCNT_STATION sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EDI sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EDIVAN sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EDIISAQ sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EDIISASQ sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EDIGS02 sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EDIREC820 sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EVSMLASTUPD sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EVSMSTATUS sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EVSOUTOFBUS sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-CREDCARD sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-CORRFLAG sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-MPIN sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-DEBTOFFSET sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-EXCLSTATFLAG sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-ANNUAL_IGT_REV sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-XUSNAM sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-XDATE sy-vline 
WA_IFMSAMDISPLAYFLDS_STR-XTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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