ABAP Select data from SAP table WRMA_S_SELECTION_FIELDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRMA_S_SELECTION_FIELDS
*  INTO TABLE @DATA(IT_WRMA_S_SELECTION_FIELDS2).
*--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_WRMA_S_SELECTION_FIELDS INDEX 1 INTO DATA(WA_WRMA_S_SELECTION_FIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRMA_S_SELECTION_FIELDS>-RMANR = 1.
<WRMA_S_SELECTION_FIELDS>-ERNAM = 1.
<WRMA_S_SELECTION_FIELDS>-ERZET = 1.
<WRMA_S_SELECTION_FIELDS>-ERDAT = 1.
<WRMA_S_SELECTION_FIELDS>-PRTID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRMA_S_SELECTION_FIELDS-ELEVEL, sy-vline,
  WA_WRMA_S_SELECTION_FIELDS-CONDTAB, sy-vline,
  WA_WRMA_S_SELECTION_FIELDS-INFCUBE, sy-vline,
  WA_WRMA_S_SELECTION_FIELDS-QUERY, sy-vline,
  WA_WRMA_S_SELECTION_FIELDS-PERIV, sy-vline,
  WA_WRMA_S_SELECTION_FIELDS-KSCHL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRMA_S_SELECTION_FIELDS 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_WRMA_S_SELECTION_FIELDS 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_WRMA_S_SELECTION_FIELDS INTO WA_WRMA_S_SELECTION_FIELDS.


*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 PERI7, internal->external for field PERIOD
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_WRMA_S_SELECTION_FIELDS-PERIOD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRMA_S_SELECTION_FIELDS-PERIOD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field PERIODN
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_WRMA_S_SELECTION_FIELDS-PERIODN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRMA_S_SELECTION_FIELDS-PERIODN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field PERIODB
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_WRMA_S_SELECTION_FIELDS-PERIODB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRMA_S_SELECTION_FIELDS-PERIODB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field PERIODF
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_WRMA_S_SELECTION_FIELDS-PERIODF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRMA_S_SELECTION_FIELDS-PERIODF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field PERIODV
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_WRMA_S_SELECTION_FIELDS-PERIODV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRMA_S_SELECTION_FIELDS-PERIODV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field PERIODVN
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_WRMA_S_SELECTION_FIELDS-PERIODVN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRMA_S_SELECTION_FIELDS-PERIODVN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field PERIODVB
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_WRMA_S_SELECTION_FIELDS-PERIODVB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRMA_S_SELECTION_FIELDS-PERIODVB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field PERIODVF
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_WRMA_S_SELECTION_FIELDS-PERIODVF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRMA_S_SELECTION_FIELDS-PERIODVF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBTRORIG
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_WRMA_S_SELECTION_FIELDS-DMBTRORIG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRMA_S_SELECTION_FIELDS-DMBTRORIG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_WRMA_S_SELECTION_FIELDS-DMBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRMA_S_SELECTION_FIELDS-DMBTR.
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_WRMA_S_SELECTION_FIELDS_STR, 
RMANR TYPE STRING,
ERNAM TYPE STRING,
ERZET TYPE STRING,
ERDAT TYPE STRING,
PRTID TYPE STRING,
ELEVEL TYPE STRING,
CONDTAB TYPE STRING,
INFCUBE TYPE STRING,
QUERY TYPE STRING,
PERIV TYPE STRING,
KSCHL TYPE STRING,
KAPPL TYPE STRING,
KALSM TYPE STRING,
OBJECTMODEL TYPE STRING,
OBJECT TYPE STRING,
AUTYPE TYPE STRING,
STUNR TYPE STRING,
ELEVELR TYPE STRING,
PERIOD TYPE STRING,
PERIODN TYPE STRING,
PERIODB TYPE STRING,
PERIODF TYPE STRING,
PERIODV TYPE STRING,
PERIODVN TYPE STRING,
PERIODVB TYPE STRING,
PERIODVF TYPE STRING,
INVDATEE TYPE STRING,
INVDATES TYPE STRING,
INVDATE TYPE STRING,
DMBTRORIG TYPE STRING,
DMBTR TYPE STRING,
WAERS TYPE STRING,
PERCENT TYPE STRING,
PERCENTN TYPE STRING,
PERCENTZ TYPE STRING,
DATE TYPE STRING,
PROFILE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRMA_S_SELECTION_FIELDS_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_WRMA_S_SELECTION_FIELDS_STR-RMANR sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-ERNAM sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-ERZET sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-ERDAT sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PRTID sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-ELEVEL sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-CONDTAB sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-INFCUBE sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-QUERY sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PERIV sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-KSCHL sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-KAPPL sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-KALSM sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-OBJECTMODEL sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-OBJECT sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-AUTYPE sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-STUNR sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-ELEVELR sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PERIOD sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PERIODN sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PERIODB sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PERIODF sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PERIODV sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PERIODVN sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PERIODVB sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PERIODVF sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-INVDATEE sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-INVDATES sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-INVDATE sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-DMBTRORIG sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-DMBTR sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-WAERS sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PERCENT sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PERCENTN sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PERCENTZ sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-DATE sy-vline 
WA_WRMA_S_SELECTION_FIELDS_STR-PROFILE sy-vline      INTO ld_text SEPARATED BY SPACE.

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