ABAP Select data from SAP table RC29K into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RC29K 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 RC29K. 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 RC29K 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_RC29K TYPE STANDARD TABLE OF RC29K,
      WA_RC29K TYPE RC29K,
      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: <RC29K> TYPE RC29K.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RC29K.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RC29K
  INTO TABLE IT_RC29K.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RC29K
*  INTO TABLE @DATA(IT_RC29K2).
*--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_RC29K INDEX 1 INTO DATA(WA_RC29K2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RC29K ASSIGNING <RC29K>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RC29K>-AUSKZ = 1.
<RC29K>-AEDAT = 1.
<RC29K>-AENAM = 1.
<RC29K>-AENNR = 1.
<RC29K>-AENRA = 1.

ENDLOOP.

LOOP AT IT_RC29K INTO WA_RC29K.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RC29K-ALEKZ, sy-vline,
  WA_RC29K-ANDAT, sy-vline,
  WA_RC29K-ANNAM, sy-vline,
  WA_RC29K-ATEXT, sy-vline,
  WA_RC29K-BMEIN, sy-vline,
  WA_RC29K-BMENG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RC29K 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_RC29K 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_RC29K INTO WA_RC29K.


*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_RC29K-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-AENNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AENRA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-AENRA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-AENRA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-BMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-BMEIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-EQUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LOSME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-LOSME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-LOSME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field R_PLNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-R_PLNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-R_PLNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field R_PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-R_PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-R_PLNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field REVLV
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-REVLV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-REVLV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SELAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-SELAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-SELAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STLAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-STLAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-STLAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field STLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-STLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-STLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field SUBMT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-SUBMT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-SUBMT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-TPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field VMTNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RC29K-VMTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29K-VMTNR.
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_RC29K_STR, 
AUSKZ TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
AENNR TYPE STRING,
AENRA TYPE STRING,
ALEKZ TYPE STRING,
ANDAT TYPE STRING,
ANNAM TYPE STRING,
ATEXT TYPE STRING,
BMEIN TYPE STRING,
BMENG TYPE STRING,
BOMOK TYPE STRING,
BSTNK TYPE STRING,
CADKZ TYPE STRING,
CDDAT TYPE STRING,
CLASS TYPE STRING,
CSLTY TYPE STRING,
DATUB TYPE STRING,
DATUV TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKTL TYPE STRING,
DOKVR TYPE STRING,
EMENG TYPE STRING,
EQUNR TYPE STRING,
EXSTL TYPE STRING,
GROES TYPE STRING,
GROSS TYPE STRING,
HERST TYPE STRING,
HTYPB TYPE STRING,
HZEIN TYPE STRING,
ICON1 TYPE STRING,
ICON2 TYPE STRING,
INGRP TYPE STRING,
INVNR TYPE STRING,
KLART TYPE STRING,
KLATX TYPE STRING,
LABOR TYPE STRING,
LBTXT TYPE STRING,
LKENZ TYPE STRING,
LOEKZ TYPE STRING,
LOSBS TYPE STRING,
LOSVN TYPE STRING,
LOSME TYPE STRING,
LTXKO TYPE STRING,
LTXZU TYPE STRING,
KUNNR TYPE STRING,
MATNR TYPE STRING,
OBKTX TYPE STRING,
PSPNR TYPE STRING,
PRTXT TYPE STRING,
R_PLNAL TYPE STRING,
R_PLNNR TYPE STRING,
R_PTEXT TYPE STRING,
REVLV TYPE STRING,
SELAL TYPE STRING,
SERGE TYPE STRING,
STKTX TYPE STRING,
STLAL TYPE STRING,
STLAN TYPE STRING,
STLBE TYPE STRING,
STLKZ TYPE STRING,
STLNR TYPE STRING,
STLST TYPE STRING,
STLTY TYPE STRING,
STOBJ TYPE STRING,
SUBMT TYPE STRING,
TETYP TYPE STRING,
TPLNR TYPE STRING,
TYPTX TYPE STRING,
VBELN TYPE STRING,
VBPOS TYPE STRING,
VMTNR TYPE STRING,
WERKS TYPE STRING,
WTEXT TYPE STRING,
ZTEXT TYPE STRING,
ASSN_INDEX TYPE STRING,
TOT_ASSGN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RC29K_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_RC29K_STR-AUSKZ sy-vline 
WA_RC29K_STR-AEDAT sy-vline 
WA_RC29K_STR-AENAM sy-vline 
WA_RC29K_STR-AENNR sy-vline 
WA_RC29K_STR-AENRA sy-vline 
WA_RC29K_STR-ALEKZ sy-vline 
WA_RC29K_STR-ANDAT sy-vline 
WA_RC29K_STR-ANNAM sy-vline 
WA_RC29K_STR-ATEXT sy-vline 
WA_RC29K_STR-BMEIN sy-vline 
WA_RC29K_STR-BMENG sy-vline 
WA_RC29K_STR-BOMOK sy-vline 
WA_RC29K_STR-BSTNK sy-vline 
WA_RC29K_STR-CADKZ sy-vline 
WA_RC29K_STR-CDDAT sy-vline 
WA_RC29K_STR-CLASS sy-vline 
WA_RC29K_STR-CSLTY sy-vline 
WA_RC29K_STR-DATUB sy-vline 
WA_RC29K_STR-DATUV sy-vline 
WA_RC29K_STR-DOKAR sy-vline 
WA_RC29K_STR-DOKNR sy-vline 
WA_RC29K_STR-DOKTL sy-vline 
WA_RC29K_STR-DOKVR sy-vline 
WA_RC29K_STR-EMENG sy-vline 
WA_RC29K_STR-EQUNR sy-vline 
WA_RC29K_STR-EXSTL sy-vline 
WA_RC29K_STR-GROES sy-vline 
WA_RC29K_STR-GROSS sy-vline 
WA_RC29K_STR-HERST sy-vline 
WA_RC29K_STR-HTYPB sy-vline 
WA_RC29K_STR-HZEIN sy-vline 
WA_RC29K_STR-ICON1 sy-vline 
WA_RC29K_STR-ICON2 sy-vline 
WA_RC29K_STR-INGRP sy-vline 
WA_RC29K_STR-INVNR sy-vline 
WA_RC29K_STR-KLART sy-vline 
WA_RC29K_STR-KLATX sy-vline 
WA_RC29K_STR-LABOR sy-vline 
WA_RC29K_STR-LBTXT sy-vline 
WA_RC29K_STR-LKENZ sy-vline 
WA_RC29K_STR-LOEKZ sy-vline 
WA_RC29K_STR-LOSBS sy-vline 
WA_RC29K_STR-LOSVN sy-vline 
WA_RC29K_STR-LOSME sy-vline 
WA_RC29K_STR-LTXKO sy-vline 
WA_RC29K_STR-LTXZU sy-vline 
WA_RC29K_STR-KUNNR sy-vline 
WA_RC29K_STR-MATNR sy-vline 
WA_RC29K_STR-OBKTX sy-vline 
WA_RC29K_STR-PSPNR sy-vline 
WA_RC29K_STR-PRTXT sy-vline 
WA_RC29K_STR-R_PLNAL sy-vline 
WA_RC29K_STR-R_PLNNR sy-vline 
WA_RC29K_STR-R_PTEXT sy-vline 
WA_RC29K_STR-REVLV sy-vline 
WA_RC29K_STR-SELAL sy-vline 
WA_RC29K_STR-SERGE sy-vline 
WA_RC29K_STR-STKTX sy-vline 
WA_RC29K_STR-STLAL sy-vline 
WA_RC29K_STR-STLAN sy-vline 
WA_RC29K_STR-STLBE sy-vline 
WA_RC29K_STR-STLKZ sy-vline 
WA_RC29K_STR-STLNR sy-vline 
WA_RC29K_STR-STLST sy-vline 
WA_RC29K_STR-STLTY sy-vline 
WA_RC29K_STR-STOBJ sy-vline 
WA_RC29K_STR-SUBMT sy-vline 
WA_RC29K_STR-TETYP sy-vline 
WA_RC29K_STR-TPLNR sy-vline 
WA_RC29K_STR-TYPTX sy-vline 
WA_RC29K_STR-VBELN sy-vline 
WA_RC29K_STR-VBPOS sy-vline 
WA_RC29K_STR-VMTNR sy-vline 
WA_RC29K_STR-WERKS sy-vline 
WA_RC29K_STR-WTEXT sy-vline 
WA_RC29K_STR-ZTEXT sy-vline 
WA_RC29K_STR-ASSN_INDEX sy-vline 
WA_RC29K_STR-TOT_ASSGN sy-vline      INTO ld_text SEPARATED BY SPACE.

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