ABAP Select data from SAP table RFM_PSST_RULE_FIELDS_ALL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFM_PSST_RULE_FIELDS_ALL
*  INTO TABLE @DATA(IT_RFM_PSST_RULE_FIELDS_ALL2).
*--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_RFM_PSST_RULE_FIELDS_ALL INDEX 1 INTO DATA(WA_RFM_PSST_RULE_FIELDS_ALL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFM_PSST_RULE_FIELDS_ALL>-AUART = 1.
<RFM_PSST_RULE_FIELDS_ALL>-WERKS = 1.
<RFM_PSST_RULE_FIELDS_ALL>-ERDAT = 1.
<RFM_PSST_RULE_FIELDS_ALL>-VDATU = 1.
<RFM_PSST_RULE_FIELDS_ALL>-VKORG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFM_PSST_RULE_FIELDS_ALL-VTWEG, sy-vline,
  WA_RFM_PSST_RULE_FIELDS_ALL-SPART, sy-vline,
  WA_RFM_PSST_RULE_FIELDS_ALL-FSH_SEASON_YEAR, sy-vline,
  WA_RFM_PSST_RULE_FIELDS_ALL-FSH_SEASON, sy-vline,
  WA_RFM_PSST_RULE_FIELDS_ALL-FSH_COLLECTION, sy-vline,
  WA_RFM_PSST_RULE_FIELDS_ALL-FSH_THEME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFM_PSST_RULE_FIELDS_ALL 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_RFM_PSST_RULE_FIELDS_ALL 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_RFM_PSST_RULE_FIELDS_ALL INTO WA_RFM_PSST_RULE_FIELDS_ALL.


*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 AUART, internal->external for field AUART
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_RFM_PSST_RULE_FIELDS_ALL-AUART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFM_PSST_RULE_FIELDS_ALL-AUART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFM_PSST_RULE_FIELDS_ALL-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFM_PSST_RULE_FIELDS_ALL-KUNNR.
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_RFM_PSST_RULE_FIELDS_ALL_STR, 
AUART TYPE STRING,
WERKS TYPE STRING,
ERDAT TYPE STRING,
VDATU TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
FSH_SEASON_YEAR TYPE STRING,
FSH_SEASON TYPE STRING,
FSH_COLLECTION TYPE STRING,
FSH_THEME TYPE STRING,
KUNNR TYPE STRING,
KVGR1 TYPE STRING,
KVGR2 TYPE STRING,
KVGR3 TYPE STRING,
KVGR4 TYPE STRING,
KVGR5 TYPE STRING,
MATKL TYPE STRING,
MVGR1 TYPE STRING,
MVGR2 TYPE STRING,
MVGR3 TYPE STRING,
MVGR4 TYPE STRING,
MVGR5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFM_PSST_RULE_FIELDS_ALL_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_RFM_PSST_RULE_FIELDS_ALL_STR-AUART sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-WERKS sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-ERDAT sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-VDATU sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-VKORG sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-VTWEG sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-SPART sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-FSH_SEASON_YEAR sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-FSH_SEASON sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-FSH_COLLECTION sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-FSH_THEME sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-KUNNR sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-KVGR1 sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-KVGR2 sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-KVGR3 sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-KVGR4 sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-KVGR5 sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-MATKL sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-MVGR1 sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-MVGR2 sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-MVGR3 sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-MVGR4 sy-vline 
WA_RFM_PSST_RULE_FIELDS_ALL_STR-MVGR5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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