ABAP Select data from SAP table RCGPMSEL into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCGPMSEL 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 RCGPMSEL. 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 RCGPMSEL 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_RCGPMSEL TYPE STANDARD TABLE OF RCGPMSEL,
      WA_RCGPMSEL TYPE RCGPMSEL,
      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: <RCGPMSEL> TYPE RCGPMSEL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGPMSEL
*  INTO TABLE @DATA(IT_RCGPMSEL2).
*--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_RCGPMSEL INDEX 1 INTO DATA(WA_RCGPMSEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGPMSEL>-MANDT = 1.
<RCGPMSEL>-CATPIN = 1.
<RCGPMSEL>-CATNAM = 1.
<RCGPMSEL>-PHRGRP = 1.
<RCGPMSEL>-PHRGNAM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGPMSEL-LANGU, sy-vline,
  WA_RCGPMSEL-SPTXT, sy-vline,
  WA_RCGPMSEL-PPSTATE, sy-vline,
  WA_RCGPMSEL-DESCR, sy-vline,
  WA_RCGPMSEL-PHRID, sy-vline,
  WA_RCGPMSEL-PHRCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGPMSEL 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_RCGPMSEL 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_RCGPMSEL INTO WA_RCGPMSEL.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RCGPMSEL-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGPMSEL-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CHRI3, internal->external for field PHRID
CALL FUNCTION 'CONVERSION_EXIT_CHRI3_OUTPUT'
  EXPORTING
    input =                      WA_RCGPMSEL-PHRID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGPMSEL-PHRID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CHRI3, internal->external for field PHRSEL
CALL FUNCTION 'CONVERSION_EXIT_CHRI3_OUTPUT'
  EXPORTING
    input =                      WA_RCGPMSEL-PHRSEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGPMSEL-PHRSEL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CHRI3, internal->external for field REFPHRID
CALL FUNCTION 'CONVERSION_EXIT_CHRI3_OUTPUT'
  EXPORTING
    input =                      WA_RCGPMSEL-REFPHRID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGPMSEL-REFPHRID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANG_SS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RCGPMSEL-LANG_SS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGPMSEL-LANG_SS.
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_RCGPMSEL_STR, 
MANDT TYPE STRING,
CATPIN TYPE STRING,
CATNAM TYPE STRING,
PHRGRP TYPE STRING,
PHRGNAM TYPE STRING,
LANGU TYPE STRING,
SPTXT TYPE STRING,
PPSTATE TYPE STRING,
DESCR TYPE STRING,
PHRID TYPE STRING,
PHRCODE TYPE STRING,
PHRTEXT TYPE STRING,
PHRSEL TYPE STRING,
PHRSNAM TYPE STRING,
REM TYPE STRING,
AENNR TYPE STRING,
VALDAT TYPE STRING,
REFCATPIN TYPE STRING,
REFCATNAM TYPE STRING,
REFPHRID TYPE STRING,
STXTFLG TYPE STRING,
LANG_SS TYPE STRING,
SPTXT_SS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGPMSEL_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_RCGPMSEL_STR-MANDT sy-vline 
WA_RCGPMSEL_STR-CATPIN sy-vline 
WA_RCGPMSEL_STR-CATNAM sy-vline 
WA_RCGPMSEL_STR-PHRGRP sy-vline 
WA_RCGPMSEL_STR-PHRGNAM sy-vline 
WA_RCGPMSEL_STR-LANGU sy-vline 
WA_RCGPMSEL_STR-SPTXT sy-vline 
WA_RCGPMSEL_STR-PPSTATE sy-vline 
WA_RCGPMSEL_STR-DESCR sy-vline 
WA_RCGPMSEL_STR-PHRID sy-vline 
WA_RCGPMSEL_STR-PHRCODE sy-vline 
WA_RCGPMSEL_STR-PHRTEXT sy-vline 
WA_RCGPMSEL_STR-PHRSEL sy-vline 
WA_RCGPMSEL_STR-PHRSNAM sy-vline 
WA_RCGPMSEL_STR-REM sy-vline 
WA_RCGPMSEL_STR-AENNR sy-vline 
WA_RCGPMSEL_STR-VALDAT sy-vline 
WA_RCGPMSEL_STR-REFCATPIN sy-vline 
WA_RCGPMSEL_STR-REFCATNAM sy-vline 
WA_RCGPMSEL_STR-REFPHRID sy-vline 
WA_RCGPMSEL_STR-STXTFLG sy-vline 
WA_RCGPMSEL_STR-LANG_SS sy-vline 
WA_RCGPMSEL_STR-SPTXT_SS sy-vline      INTO ld_text SEPARATED BY SPACE.

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