ABAP Select data from SAP table CFB_S_RMC_LIST_RELDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CFB_S_RMC_LIST_RELDOC
*  INTO TABLE @DATA(IT_CFB_S_RMC_LIST_RELDOC2).
*--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_CFB_S_RMC_LIST_RELDOC INDEX 1 INTO DATA(WA_CFB_S_RMC_LIST_RELDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CFB_S_RMC_LIST_RELDOC>-ROW_KEY = 1.
<CFB_S_RMC_LIST_RELDOC>-ITEM_NO = 1.
<CFB_S_RMC_LIST_RELDOC>-PO_NUMBER = 1.
<CFB_S_RMC_LIST_RELDOC>-PO_ITEM = 1.
<CFB_S_RMC_LIST_RELDOC>-PO_DATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CFB_S_RMC_LIST_RELDOC-QUANTITY, sy-vline,
  WA_CFB_S_RMC_LIST_RELDOC-PO_UNIT, sy-vline,
  WA_CFB_S_RMC_LIST_RELDOC-PO_UNIT_ISO, sy-vline,
  WA_CFB_S_RMC_LIST_RELDOC-NET_VALUE, sy-vline,
  WA_CFB_S_RMC_LIST_RELDOC-CURRENCY, sy-vline,
  WA_CFB_S_RMC_LIST_RELDOC-CURRENCY_ISO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CFB_S_RMC_LIST_RELDOC 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_CFB_S_RMC_LIST_RELDOC 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_CFB_S_RMC_LIST_RELDOC INTO WA_CFB_S_RMC_LIST_RELDOC.


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

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

*Conversion exit EXCRT, internal->external for field EXCH_RATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_CFB_S_RMC_LIST_RELDOC-EXCH_RATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CFB_S_RMC_LIST_RELDOC-EXCH_RATE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CFB_S_RMC_LIST_RELDOC-LOGSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CFB_S_RMC_LIST_RELDOC-LOGSYSTEM.
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_CFB_S_RMC_LIST_RELDOC_STR, 
ROW_KEY TYPE STRING,
ITEM_NO TYPE STRING,
PO_NUMBER TYPE STRING,
PO_ITEM TYPE STRING,
PO_DATE TYPE STRING,
QUANTITY TYPE STRING,
PO_UNIT TYPE STRING,
PO_UNIT_ISO TYPE STRING,
NET_VALUE TYPE STRING,
CURRENCY TYPE STRING,
CURRENCY_ISO TYPE STRING,
EXCH_RATE TYPE STRING,
DELETE_IND TYPE STRING,
CENTRAL_PO_NUMBER TYPE STRING,
LOGSYSTEM TYPE STRING,
COMP_CODE TYPE STRING,
PLANT TYPE STRING,
PURCH_ORG TYPE STRING,
CH_ON TYPE STRING,
DOC_CAT TYPE STRING,
MEMORY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CFB_S_RMC_LIST_RELDOC_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_CFB_S_RMC_LIST_RELDOC_STR-ROW_KEY sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-ITEM_NO sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-PO_NUMBER sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-PO_ITEM sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-PO_DATE sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-QUANTITY sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-PO_UNIT sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-PO_UNIT_ISO sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-NET_VALUE sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-CURRENCY sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-CURRENCY_ISO sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-EXCH_RATE sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-DELETE_IND sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-CENTRAL_PO_NUMBER sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-LOGSYSTEM sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-COMP_CODE sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-PLANT sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-PURCH_ORG sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-CH_ON sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-DOC_CAT sy-vline 
WA_CFB_S_RMC_LIST_RELDOC_STR-MEMORY sy-vline      INTO ld_text SEPARATED BY SPACE.

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