ABAP Select data from SAP table RC29B1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RC29B1 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 RC29B1. 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 RC29B1 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_RC29B1 TYPE STANDARD TABLE OF RC29B1,
      WA_RC29B1 TYPE RC29B1,
      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: <RC29B1> TYPE RC29B1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RC29B1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RC29B1
  INTO TABLE IT_RC29B1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RC29B1
*  INTO TABLE @DATA(IT_RC29B12).
*--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_RC29B1 INDEX 1 INTO DATA(WA_RC29B12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RC29B1 ASSIGNING <RC29B1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RC29B1>-BR_MODE = 1.
<RC29B1>-IDNRK_MAT = 1.
<RC29B1>-IDNRK_ITEM = 1.
<RC29B1>-IDNRK_ASSY = 1.
<RC29B1>-DOKAR = 1.

ENDLOOP.

LOOP AT IT_RC29B1 INTO WA_RC29B1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RC29B1-DOKNR, sy-vline,
  WA_RC29B1-DOKVR, sy-vline,
  WA_RC29B1-DOKTL, sy-vline,
  WA_RC29B1-KLART, sy-vline,
  WA_RC29B1-CLASS, sy-vline,
  WA_RC29B1-OJTXP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RC29B1 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_RC29B1 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_RC29B1 INTO WA_RC29B1.


*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 MATN1, internal->external for field IDNRK_MAT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RC29B1-IDNRK_MAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29B1-IDNRK_MAT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field IDNRK_ITEM
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RC29B1-IDNRK_ITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29B1-IDNRK_ITEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field IDNRK_ASSY
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RC29B1-IDNRK_ASSY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29B1-IDNRK_ASSY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29B1-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29B1-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29B1-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29B1-AENNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29B1-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29B1-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_RC29B1-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29B1-PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field TOPMATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RC29B1-TOPMATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29B1-TOPMATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STLAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC29B1-STLAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC29B1-STLAL.
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_RC29B1_STR, 
BR_MODE TYPE STRING,
IDNRK_MAT TYPE STRING,
IDNRK_ITEM TYPE STRING,
IDNRK_ASSY TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
KLART TYPE STRING,
CLASS TYPE STRING,
OJTXP TYPE STRING,
XTLTY TYPE STRING,
POTX1 TYPE STRING,
STUFE TYPE STRING,
WEGXX TYPE STRING,
CAPID TYPE STRING,
CUOBJ TYPE STRING,
DATUV TYPE STRING,
AENNR TYPE STRING,
MULTIL TYPE STRING,
WERKS TYPE STRING,
VBELN TYPE STRING,
VBPOS TYPE STRING,
PSPNR TYPE STRING,
HOLD_STB TYPE STRING,
TOPMATNR TYPE STRING,
STLAL TYPE STRING,
RFPNT TYPE STRING,
SORTF TYPE STRING,
STOPSTUFE TYPE STRING,
COPY_FREE_BOM TYPE STRING,
COPY_BOM TYPE STRING,
CREA_MAT TYPE STRING,
TEST_MODE TYPE STRING,
POS_OVERWRITE TYPE STRING,
ALLOC_DEL TYPE STRING,
ALLOC_SINGLE TYPE STRING,
USE_MEMORY TYPE STRING,
AUFART TYPE STRING,
EMENG TYPE STRING,
SGT_RCAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RC29B1_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_RC29B1_STR-BR_MODE sy-vline 
WA_RC29B1_STR-IDNRK_MAT sy-vline 
WA_RC29B1_STR-IDNRK_ITEM sy-vline 
WA_RC29B1_STR-IDNRK_ASSY sy-vline 
WA_RC29B1_STR-DOKAR sy-vline 
WA_RC29B1_STR-DOKNR sy-vline 
WA_RC29B1_STR-DOKVR sy-vline 
WA_RC29B1_STR-DOKTL sy-vline 
WA_RC29B1_STR-KLART sy-vline 
WA_RC29B1_STR-CLASS sy-vline 
WA_RC29B1_STR-OJTXP sy-vline 
WA_RC29B1_STR-XTLTY sy-vline 
WA_RC29B1_STR-POTX1 sy-vline 
WA_RC29B1_STR-STUFE sy-vline 
WA_RC29B1_STR-WEGXX sy-vline 
WA_RC29B1_STR-CAPID sy-vline 
WA_RC29B1_STR-CUOBJ sy-vline 
WA_RC29B1_STR-DATUV sy-vline 
WA_RC29B1_STR-AENNR sy-vline 
WA_RC29B1_STR-MULTIL sy-vline 
WA_RC29B1_STR-WERKS sy-vline 
WA_RC29B1_STR-VBELN sy-vline 
WA_RC29B1_STR-VBPOS sy-vline 
WA_RC29B1_STR-PSPNR sy-vline 
WA_RC29B1_STR-HOLD_STB sy-vline 
WA_RC29B1_STR-TOPMATNR sy-vline 
WA_RC29B1_STR-STLAL sy-vline 
WA_RC29B1_STR-RFPNT sy-vline 
WA_RC29B1_STR-SORTF sy-vline 
WA_RC29B1_STR-STOPSTUFE sy-vline 
WA_RC29B1_STR-COPY_FREE_BOM sy-vline 
WA_RC29B1_STR-COPY_BOM sy-vline 
WA_RC29B1_STR-CREA_MAT sy-vline 
WA_RC29B1_STR-TEST_MODE sy-vline 
WA_RC29B1_STR-POS_OVERWRITE sy-vline 
WA_RC29B1_STR-ALLOC_DEL sy-vline 
WA_RC29B1_STR-ALLOC_SINGLE sy-vline 
WA_RC29B1_STR-USE_MEMORY sy-vline 
WA_RC29B1_STR-AUFART sy-vline 
WA_RC29B1_STR-EMENG sy-vline 
WA_RC29B1_STR-SGT_RCAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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