ABAP Select data from SAP table RCPS_API_PAC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCPS_API_PAC 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_API_PAC. 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_API_PAC 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_API_PAC TYPE STANDARD TABLE OF RCPS_API_PAC,
      WA_RCPS_API_PAC TYPE RCPS_API_PAC,
      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_API_PAC> TYPE RCPS_API_PAC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCPS_API_PAC
*  INTO TABLE @DATA(IT_RCPS_API_PAC2).
*--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_API_PAC INDEX 1 INTO DATA(WA_RCPS_API_PAC2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCPS_API_PAC-AENNR_ROOT, sy-vline,
  WA_RCPS_API_PAC-LINEMODE, sy-vline,
  WA_RCPS_API_PAC-PNAME, sy-vline,
  WA_RCPS_API_PAC-PNTYPE, sy-vline,
  WA_RCPS_API_PAC-PNCNT, sy-vline,
  WA_RCPS_API_PAC-PNTXCNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCPS_API_PAC 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_API_PAC 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_API_PAC INTO WA_RCPS_API_PAC.


*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_API_PAC-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCPS_API_PAC-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_API_PAC-AENNR_ROOT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCPS_API_PAC-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_API_PAC-LOTUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCPS_API_PAC-LOTUNIT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit SPEC1, internal->external for field SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_RCPS_API_PAC-SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCPS_API_PAC-SUBID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field RCP_LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCPS_API_PAC-RCP_LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCPS_API_PAC-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_API_PAC_STR, 
MANDT TYPE STRING,
GUID TYPE STRING,
AENNR TYPE STRING,
GUID_MAST TYPE STRING,
GUID_ROOT TYPE STRING,
AENNR_ROOT TYPE STRING,
LINEMODE TYPE STRING,
PNAME TYPE STRING,
PNTYPE TYPE STRING,
PNCNT TYPE STRING,
PNTXCNT TYPE STRING,
POBNR TYPE STRING,
VALFROM TYPE STRING,
VALTO TYPE STRING,
LOTMIN TYPE STRING,
LOTMAX TYPE STRING,
LOTUNIT TYPE STRING,
OTYPE_ORGID TYPE STRING,
REALO TYPE STRING,
POB_TIMSTMP TYPE STRING,
COPY_FROM TYPE STRING,
FLG_INNR TYPE STRING,
AUTHGRP TYPE STRING,
EHS_RECN TYPE STRING,
SUBCAT TYPE STRING,
SUBID TYPE STRING,
RMS_CREADAT TYPE STRING,
RMS_CREABY TYPE STRING,
RMS_CHNGDAT TYPE STRING,
RMS_CHNGBY TYPE STRING,
RMS_LOGSYS TYPE STRING,
RCP_CREADAT TYPE STRING,
RCP_CREABY TYPE STRING,
RCP_CHNGDAT TYPE STRING,
RCP_CHNGBY TYPE STRING,
RCP_LOGSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCPS_API_PAC_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_API_PAC_STR-MANDT sy-vline 
WA_RCPS_API_PAC_STR-GUID sy-vline 
WA_RCPS_API_PAC_STR-AENNR sy-vline 
WA_RCPS_API_PAC_STR-GUID_MAST sy-vline 
WA_RCPS_API_PAC_STR-GUID_ROOT sy-vline 
WA_RCPS_API_PAC_STR-AENNR_ROOT sy-vline 
WA_RCPS_API_PAC_STR-LINEMODE sy-vline 
WA_RCPS_API_PAC_STR-PNAME sy-vline 
WA_RCPS_API_PAC_STR-PNTYPE sy-vline 
WA_RCPS_API_PAC_STR-PNCNT sy-vline 
WA_RCPS_API_PAC_STR-PNTXCNT sy-vline 
WA_RCPS_API_PAC_STR-POBNR sy-vline 
WA_RCPS_API_PAC_STR-VALFROM sy-vline 
WA_RCPS_API_PAC_STR-VALTO sy-vline 
WA_RCPS_API_PAC_STR-LOTMIN sy-vline 
WA_RCPS_API_PAC_STR-LOTMAX sy-vline 
WA_RCPS_API_PAC_STR-LOTUNIT sy-vline 
WA_RCPS_API_PAC_STR-OTYPE_ORGID sy-vline 
WA_RCPS_API_PAC_STR-REALO sy-vline 
WA_RCPS_API_PAC_STR-POB_TIMSTMP sy-vline 
WA_RCPS_API_PAC_STR-COPY_FROM sy-vline 
WA_RCPS_API_PAC_STR-FLG_INNR sy-vline 
WA_RCPS_API_PAC_STR-AUTHGRP sy-vline 
WA_RCPS_API_PAC_STR-EHS_RECN sy-vline 
WA_RCPS_API_PAC_STR-SUBCAT sy-vline 
WA_RCPS_API_PAC_STR-SUBID sy-vline 
WA_RCPS_API_PAC_STR-RMS_CREADAT sy-vline 
WA_RCPS_API_PAC_STR-RMS_CREABY sy-vline 
WA_RCPS_API_PAC_STR-RMS_CHNGDAT sy-vline 
WA_RCPS_API_PAC_STR-RMS_CHNGBY sy-vline 
WA_RCPS_API_PAC_STR-RMS_LOGSYS sy-vline 
WA_RCPS_API_PAC_STR-RCP_CREADAT sy-vline 
WA_RCPS_API_PAC_STR-RCP_CREABY sy-vline 
WA_RCPS_API_PAC_STR-RCP_CHNGDAT sy-vline 
WA_RCPS_API_PAC_STR-RCP_CHNGBY sy-vline 
WA_RCPS_API_PAC_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.