ABAP Select data from SAP table RCPS_MR_API_RCP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCPS_MR_API_RCP
*  INTO TABLE @DATA(IT_RCPS_MR_API_RCP2).
*--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_RCPS_MR_API_RCP INDEX 1 INTO DATA(WA_RCPS_MR_API_RCP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCPS_MR_API_RCP>-GUID = 1.
<RCPS_MR_API_RCP>-AENNR = 1.
<RCPS_MR_API_RCP>-GUID_MAST = 1.
<RCPS_MR_API_RCP>-GUID_ROOT = 1.
<RCPS_MR_API_RCP>-AENNR_ROOT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCPS_MR_API_RCP-PNAME, sy-vline,
  WA_RCPS_MR_API_RCP-PNTYPE, sy-vline,
  WA_RCPS_MR_API_RCP-PVGUID, sy-vline,
  WA_RCPS_MR_API_RCP-PVCDCNT, sy-vline,
  WA_RCPS_MR_API_RCP-STATUS, sy-vline,
  WA_RCPS_MR_API_RCP-VALFROM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCPS_MR_API_RCP 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_RCPS_MR_API_RCP 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_RCPS_MR_API_RCP INTO WA_RCPS_MR_API_RCP.


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

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

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

*Conversion exit ALPHA, internal->external for field RCP_LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCPS_MR_API_RCP-RCP_LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCPS_MR_API_RCP-RCP_LOGSYS.
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_RCPS_MR_API_RCP_STR, 
GUID TYPE STRING,
AENNR TYPE STRING,
GUID_MAST TYPE STRING,
GUID_ROOT TYPE STRING,
AENNR_ROOT TYPE STRING,
PNAME TYPE STRING,
PNTYPE TYPE STRING,
PVGUID TYPE STRING,
PVCDCNT TYPE STRING,
STATUS TYPE STRING,
VALFROM TYPE STRING,
VALTO TYPE STRING,
LOTMIN TYPE STRING,
LOTMAX TYPE STRING,
LOTUNIT TYPE STRING,
REFQUANT TYPE STRING,
SUBCAT TYPE STRING,
RCP_LOGSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCPS_MR_API_RCP_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_RCPS_MR_API_RCP_STR-GUID sy-vline 
WA_RCPS_MR_API_RCP_STR-AENNR sy-vline 
WA_RCPS_MR_API_RCP_STR-GUID_MAST sy-vline 
WA_RCPS_MR_API_RCP_STR-GUID_ROOT sy-vline 
WA_RCPS_MR_API_RCP_STR-AENNR_ROOT sy-vline 
WA_RCPS_MR_API_RCP_STR-PNAME sy-vline 
WA_RCPS_MR_API_RCP_STR-PNTYPE sy-vline 
WA_RCPS_MR_API_RCP_STR-PVGUID sy-vline 
WA_RCPS_MR_API_RCP_STR-PVCDCNT sy-vline 
WA_RCPS_MR_API_RCP_STR-STATUS sy-vline 
WA_RCPS_MR_API_RCP_STR-VALFROM sy-vline 
WA_RCPS_MR_API_RCP_STR-VALTO sy-vline 
WA_RCPS_MR_API_RCP_STR-LOTMIN sy-vline 
WA_RCPS_MR_API_RCP_STR-LOTMAX sy-vline 
WA_RCPS_MR_API_RCP_STR-LOTUNIT sy-vline 
WA_RCPS_MR_API_RCP_STR-REFQUANT sy-vline 
WA_RCPS_MR_API_RCP_STR-SUBCAT sy-vline 
WA_RCPS_MR_API_RCP_STR-RCP_LOGSYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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