ABAP Select data from SAP table RC29L into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RC29L 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 RC29L. 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 RC29L 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_RC29L TYPE STANDARD TABLE OF RC29L,
      WA_RC29L TYPE RC29L,
      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: <RC29L> TYPE RC29L.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RC29L.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RC29L
  INTO TABLE IT_RC29L.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RC29L
*  INTO TABLE @DATA(IT_RC29L2).
*--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_RC29L INDEX 1 INTO DATA(WA_RC29L2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RC29L ASSIGNING <RC29L>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RC29L>-AENNR = 1.
<RC29L>-DATUV = 1.
<RC29L>-DATUB = 1.
<RC29L>-REVLV = 1.
<RC29L>-EMENG = 1.

ENDLOOP.

LOOP AT IT_RC29L INTO WA_RC29L.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RC29L-RMENG, sy-vline,
  WA_RC29L-DIRKT, sy-vline,
  WA_RC29L-UEBKL, sy-vline,
  WA_RC29L-ERSKZ, sy-vline,
  WA_RC29L-BAGRP, sy-vline,
  WA_RC29L-MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RC29L 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_RC29L 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_RC29L INTO WA_RC29L.


*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_RC29L-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29L-AENNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field REVLV
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RC29L-REVLV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29L-REVLV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field BAGRP
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RC29L-BAGRP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29L-BAGRP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RC29L-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29L-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29L-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29L-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STLAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29L-STLAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29L-STLAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field IDNRK
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RC29L-IDNRK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29L-IDNRK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29L-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29L-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_RC29L-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29L-PSPNR.
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_RC29L_STR, 
AENNR TYPE STRING,
DATUV TYPE STRING,
DATUB TYPE STRING,
REVLV TYPE STRING,
EMENG TYPE STRING,
RMENG TYPE STRING,
DIRKT TYPE STRING,
UEBKL TYPE STRING,
ERSKZ TYPE STRING,
BAGRP TYPE STRING,
MATNR TYPE STRING,
CLASS TYPE STRING,
KLART TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
DSPCO TYPE STRING,
POSTP TYPE STRING,
BEIKZ TYPE STRING,
RVREL TYPE STRING,
SANFE TYPE STRING,
SANIN TYPE STRING,
SANKA TYPE STRING,
SANKO TYPE STRING,
SANVS TYPE STRING,
STLAL TYPE STRING,
STLAN TYPE STRING,
WERKS TYPE STRING,
ALTVO TYPE STRING,
LTEXT TYPE STRING,
BREMS TYPE STRING,
ZBGRP TYPE STRING,
ERSSL TYPE STRING,
BESSL TYPE STRING,
SRTKZ TYPE STRING,
IDNRK TYPE STRING,
AUSSS TYPE STRING,
GBRAZ TYPE STRING,
UPSAZ TYPE STRING,
SCHGT TYPE STRING,
STKKZ TYPE STRING,
CAPID TYPE STRING,
DSPLP TYPE STRING,
PRNTP TYPE STRING,
VALST TYPE STRING,
DOCTP TYPE STRING,
EQUTP TYPE STRING,
KNDTP TYPE STRING,
MATTP TYPE STRING,
PRJTP TYPE STRING,
STDTP TYPE STRING,
TPLTP TYPE STRING,
MEHRS TYPE STRING,
RVRSL TYPE STRING,
KLKSL TYPE STRING,
VBELN TYPE STRING,
VBPOS TYPE STRING,
PSPNR TYPE STRING,
MAXST TYPE STRING,
BZVGL TYPE STRING,
SGT_IGNORE TYPE STRING,
SGT_SCAT TYPE STRING,
PREIS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RC29L_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_RC29L_STR-AENNR sy-vline 
WA_RC29L_STR-DATUV sy-vline 
WA_RC29L_STR-DATUB sy-vline 
WA_RC29L_STR-REVLV sy-vline 
WA_RC29L_STR-EMENG sy-vline 
WA_RC29L_STR-RMENG sy-vline 
WA_RC29L_STR-DIRKT sy-vline 
WA_RC29L_STR-UEBKL sy-vline 
WA_RC29L_STR-ERSKZ sy-vline 
WA_RC29L_STR-BAGRP sy-vline 
WA_RC29L_STR-MATNR sy-vline 
WA_RC29L_STR-CLASS sy-vline 
WA_RC29L_STR-KLART sy-vline 
WA_RC29L_STR-DOKAR sy-vline 
WA_RC29L_STR-DOKNR sy-vline 
WA_RC29L_STR-DOKVR sy-vline 
WA_RC29L_STR-DOKTL sy-vline 
WA_RC29L_STR-DSPCO sy-vline 
WA_RC29L_STR-POSTP sy-vline 
WA_RC29L_STR-BEIKZ sy-vline 
WA_RC29L_STR-RVREL sy-vline 
WA_RC29L_STR-SANFE sy-vline 
WA_RC29L_STR-SANIN sy-vline 
WA_RC29L_STR-SANKA sy-vline 
WA_RC29L_STR-SANKO sy-vline 
WA_RC29L_STR-SANVS sy-vline 
WA_RC29L_STR-STLAL sy-vline 
WA_RC29L_STR-STLAN sy-vline 
WA_RC29L_STR-WERKS sy-vline 
WA_RC29L_STR-ALTVO sy-vline 
WA_RC29L_STR-LTEXT sy-vline 
WA_RC29L_STR-BREMS sy-vline 
WA_RC29L_STR-ZBGRP sy-vline 
WA_RC29L_STR-ERSSL sy-vline 
WA_RC29L_STR-BESSL sy-vline 
WA_RC29L_STR-SRTKZ sy-vline 
WA_RC29L_STR-IDNRK sy-vline 
WA_RC29L_STR-AUSSS sy-vline 
WA_RC29L_STR-GBRAZ sy-vline 
WA_RC29L_STR-UPSAZ sy-vline 
WA_RC29L_STR-SCHGT sy-vline 
WA_RC29L_STR-STKKZ sy-vline 
WA_RC29L_STR-CAPID sy-vline 
WA_RC29L_STR-DSPLP sy-vline 
WA_RC29L_STR-PRNTP sy-vline 
WA_RC29L_STR-VALST sy-vline 
WA_RC29L_STR-DOCTP sy-vline 
WA_RC29L_STR-EQUTP sy-vline 
WA_RC29L_STR-KNDTP sy-vline 
WA_RC29L_STR-MATTP sy-vline 
WA_RC29L_STR-PRJTP sy-vline 
WA_RC29L_STR-STDTP sy-vline 
WA_RC29L_STR-TPLTP sy-vline 
WA_RC29L_STR-MEHRS sy-vline 
WA_RC29L_STR-RVRSL sy-vline 
WA_RC29L_STR-KLKSL sy-vline 
WA_RC29L_STR-VBELN sy-vline 
WA_RC29L_STR-VBPOS sy-vline 
WA_RC29L_STR-PSPNR sy-vline 
WA_RC29L_STR-MAXST sy-vline 
WA_RC29L_STR-BZVGL sy-vline 
WA_RC29L_STR-SGT_IGNORE sy-vline 
WA_RC29L_STR-SGT_SCAT sy-vline 
WA_RC29L_STR-PREIS sy-vline      INTO ld_text SEPARATED BY SPACE.

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