ABAP Select data from SAP table RCGBOMHEAD 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 RCGBOMHEAD 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 RCGBOMHEAD. 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 RCGBOMHEAD 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_RCGBOMHEAD TYPE STANDARD TABLE OF RCGBOMHEAD,
      WA_RCGBOMHEAD TYPE RCGBOMHEAD,
      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: <RCGBOMHEAD> TYPE RCGBOMHEAD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGBOMHEAD
*  INTO TABLE @DATA(IT_RCGBOMHEAD2).
*--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_RCGBOMHEAD INDEX 1 INTO DATA(WA_RCGBOMHEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGBOMHEAD>-MANDT = 1.
<RCGBOMHEAD>-STLTY = 1.
<RCGBOMHEAD>-STLNR = 1.
<RCGBOMHEAD>-STLAL = 1.
<RCGBOMHEAD>-STKOZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGBOMHEAD-DATUV, sy-vline,
  WA_RCGBOMHEAD-TECHV, sy-vline,
  WA_RCGBOMHEAD-AENNR, sy-vline,
  WA_RCGBOMHEAD-LKENZ, sy-vline,
  WA_RCGBOMHEAD-LOEKZ, sy-vline,
  WA_RCGBOMHEAD-VGKZL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGBOMHEAD 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_RCGBOMHEAD 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_RCGBOMHEAD INTO WA_RCGBOMHEAD.


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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field AENRL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCGBOMHEAD-AENRL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGBOMHEAD-AENRL.
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_RCGBOMHEAD_STR, 
MANDT TYPE STRING,
STLTY TYPE STRING,
STLNR TYPE STRING,
STLAL TYPE STRING,
STKOZ TYPE STRING,
DATUV TYPE STRING,
TECHV TYPE STRING,
AENNR TYPE STRING,
LKENZ TYPE STRING,
LOEKZ TYPE STRING,
VGKZL TYPE STRING,
ANDAT TYPE STRING,
ANNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BMEIN TYPE STRING,
BMENG TYPE STRING,
CADKZ TYPE STRING,
LABOR TYPE STRING,
LTXSP TYPE STRING,
STKTX TYPE STRING,
STLST TYPE STRING,
WRKAN TYPE STRING,
DVDAT TYPE STRING,
DVNAM TYPE STRING,
AEHLP TYPE STRING,
ALEKZ TYPE STRING,
GUIDX TYPE STRING,
VALID_TO TYPE STRING,
ECN_TO TYPE STRING,
BOM_VERSN TYPE STRING,
VERSNST TYPE STRING,
VERSNLASTIND TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
BOM_AIN_IND TYPE STRING,
BOM_PREV_VERSN TYPE STRING,
DUMMY_STKO_INCL_EEW_PS TYPE STRING,
STLAN TYPE STRING,
EXSTL TYPE STRING,
ALTST TYPE STRING,
VARST TYPE STRING,
KBAUS TYPE STRING,
STLBE TYPE STRING,
ZTEXT TYPE STRING,
HISDT TYPE STRING,
HISSR TYPE STRING,
HISTK TYPE STRING,
STUEZ TYPE STRING,
MAXKN TYPE STRING,
KZPLN TYPE STRING,
AENRL TYPE STRING,
CLSMX TYPE STRING,
STLDT TYPE STRING,
STLTM TYPE STRING,
MAXKAN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGBOMHEAD_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_RCGBOMHEAD_STR-MANDT sy-vline 
WA_RCGBOMHEAD_STR-STLTY sy-vline 
WA_RCGBOMHEAD_STR-STLNR sy-vline 
WA_RCGBOMHEAD_STR-STLAL sy-vline 
WA_RCGBOMHEAD_STR-STKOZ sy-vline 
WA_RCGBOMHEAD_STR-DATUV sy-vline 
WA_RCGBOMHEAD_STR-TECHV sy-vline 
WA_RCGBOMHEAD_STR-AENNR sy-vline 
WA_RCGBOMHEAD_STR-LKENZ sy-vline 
WA_RCGBOMHEAD_STR-LOEKZ sy-vline 
WA_RCGBOMHEAD_STR-VGKZL sy-vline 
WA_RCGBOMHEAD_STR-ANDAT sy-vline 
WA_RCGBOMHEAD_STR-ANNAM sy-vline 
WA_RCGBOMHEAD_STR-AEDAT sy-vline 
WA_RCGBOMHEAD_STR-AENAM sy-vline 
WA_RCGBOMHEAD_STR-BMEIN sy-vline 
WA_RCGBOMHEAD_STR-BMENG sy-vline 
WA_RCGBOMHEAD_STR-CADKZ sy-vline 
WA_RCGBOMHEAD_STR-LABOR sy-vline 
WA_RCGBOMHEAD_STR-LTXSP sy-vline 
WA_RCGBOMHEAD_STR-STKTX sy-vline 
WA_RCGBOMHEAD_STR-STLST sy-vline 
WA_RCGBOMHEAD_STR-WRKAN sy-vline 
WA_RCGBOMHEAD_STR-DVDAT sy-vline 
WA_RCGBOMHEAD_STR-DVNAM sy-vline 
WA_RCGBOMHEAD_STR-AEHLP sy-vline 
WA_RCGBOMHEAD_STR-ALEKZ sy-vline 
WA_RCGBOMHEAD_STR-GUIDX sy-vline 
WA_RCGBOMHEAD_STR-VALID_TO sy-vline 
WA_RCGBOMHEAD_STR-ECN_TO sy-vline 
WA_RCGBOMHEAD_STR-BOM_VERSN sy-vline 
WA_RCGBOMHEAD_STR-VERSNST sy-vline 
WA_RCGBOMHEAD_STR-VERSNLASTIND sy-vline 
WA_RCGBOMHEAD_STR-LASTCHANGEDATETIME sy-vline 
WA_RCGBOMHEAD_STR-BOM_AIN_IND sy-vline 
WA_RCGBOMHEAD_STR-BOM_PREV_VERSN sy-vline 
WA_RCGBOMHEAD_STR-DUMMY_STKO_INCL_EEW_PS sy-vline 
WA_RCGBOMHEAD_STR-STLAN sy-vline 
WA_RCGBOMHEAD_STR-EXSTL sy-vline 
WA_RCGBOMHEAD_STR-ALTST sy-vline 
WA_RCGBOMHEAD_STR-VARST sy-vline 
WA_RCGBOMHEAD_STR-KBAUS sy-vline 
WA_RCGBOMHEAD_STR-STLBE sy-vline 
WA_RCGBOMHEAD_STR-ZTEXT sy-vline 
WA_RCGBOMHEAD_STR-HISDT sy-vline 
WA_RCGBOMHEAD_STR-HISSR sy-vline 
WA_RCGBOMHEAD_STR-HISTK sy-vline 
WA_RCGBOMHEAD_STR-STUEZ sy-vline 
WA_RCGBOMHEAD_STR-MAXKN sy-vline 
WA_RCGBOMHEAD_STR-KZPLN sy-vline 
WA_RCGBOMHEAD_STR-AENRL sy-vline 
WA_RCGBOMHEAD_STR-CLSMX sy-vline 
WA_RCGBOMHEAD_STR-STLDT sy-vline 
WA_RCGBOMHEAD_STR-STLTM sy-vline 
WA_RCGBOMHEAD_STR-MAXKAN sy-vline      INTO ld_text SEPARATED BY SPACE.

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