ABAP Select data from SAP table RC271 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RC271 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 RC271. 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 RC271 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_RC271 TYPE STANDARD TABLE OF RC271,
      WA_RC271 TYPE RC271,
      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: <RC271> TYPE RC271.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RC271.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RC271
  INTO TABLE IT_RC271.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RC271
*  INTO TABLE @DATA(IT_RC2712).
*--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_RC271 INDEX 1 INTO DATA(WA_RC2712).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RC271 ASSIGNING <RC271>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RC271>-AENNR = 1.
<RC271>-REVLV = 1.
<RC271>-AESZN = 1.
<RC271>-DATUV = 1.
<RC271>-DATUB = 1.

ENDLOOP.

LOOP AT IT_RC271 INTO WA_RC271.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RC271-LOSVN, sy-vline,
  WA_RC271-PLNAL, sy-vline,
  WA_RC271-PLNTY, sy-vline,
  WA_RC271-PLNNR, sy-vline,
  WA_RC271-VBELN, sy-vline,
  WA_RC271-POSNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RC271 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_RC271 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_RC271 INTO WA_RC271.


*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_RC271-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC271-AENNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field REVLV
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RC271-REVLV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC271-REVLV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC271-PLNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC271-PLNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC271-PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC271-PLNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC271-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC271-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_RC271-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC271-PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNAL_VORSCHLAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC271-PLNAL_VORSCHLAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC271-PLNAL_VORSCHLAG.
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_RC271_STR, 
AENNR TYPE STRING,
REVLV TYPE STRING,
AESZN TYPE STRING,
DATUV TYPE STRING,
DATUB TYPE STRING,
LOSVN TYPE STRING,
PLNAL TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
PSPNR TYPE STRING,
STATU TYPE STRING,
WERKS TYPE STRING,
STTAG TYPE STRING,
VAGRP TYPE STRING,
PROFIDNETZ TYPE STRING,
VERWE TYPE STRING,
INGRG TYPE STRING,
IWERK TYPE STRING,
IGEWERK TYPE STRING,
ARBID TYPE STRING,
ARBPL TYPE STRING,
NO_CHK_KZ TYPE STRING,
PLNAL_VORSCHLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RC271_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_RC271_STR-AENNR sy-vline 
WA_RC271_STR-REVLV sy-vline 
WA_RC271_STR-AESZN sy-vline 
WA_RC271_STR-DATUV sy-vline 
WA_RC271_STR-DATUB sy-vline 
WA_RC271_STR-LOSVN sy-vline 
WA_RC271_STR-PLNAL sy-vline 
WA_RC271_STR-PLNTY sy-vline 
WA_RC271_STR-PLNNR sy-vline 
WA_RC271_STR-VBELN sy-vline 
WA_RC271_STR-POSNR sy-vline 
WA_RC271_STR-PSPNR sy-vline 
WA_RC271_STR-STATU sy-vline 
WA_RC271_STR-WERKS sy-vline 
WA_RC271_STR-STTAG sy-vline 
WA_RC271_STR-VAGRP sy-vline 
WA_RC271_STR-PROFIDNETZ sy-vline 
WA_RC271_STR-VERWE sy-vline 
WA_RC271_STR-INGRG sy-vline 
WA_RC271_STR-IWERK sy-vline 
WA_RC271_STR-IGEWERK sy-vline 
WA_RC271_STR-ARBID sy-vline 
WA_RC271_STR-ARBPL sy-vline 
WA_RC271_STR-NO_CHK_KZ sy-vline 
WA_RC271_STR-PLNAL_VORSCHLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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