ABAP Select data from SAP table RCGGENPOSDRG 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 RCGGENPOSDRG 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 RCGGENPOSDRG. 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 RCGGENPOSDRG 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_RCGGENPOSDRG TYPE STANDARD TABLE OF RCGGENPOSDRG,
      WA_RCGGENPOSDRG TYPE RCGGENPOSDRG,
      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: <RCGGENPOSDRG> TYPE RCGGENPOSDRG.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGGENPOSDRG
*  INTO TABLE @DATA(IT_RCGGENPOSDRG2).
*--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_RCGGENPOSDRG INDEX 1 INTO DATA(WA_RCGGENPOSDRG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGGENPOSDRG>-ESNTFLG = 1.
<RCGGENPOSDRG>-MARKFLG = 1.
<RCGGENPOSDRG>-SELEFLG = 1.
<RCGGENPOSDRG>-LINENO = 1.
<RCGGENPOSDRG>-LINEMOD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGGENPOSDRG-CHCOFLG, sy-vline,
  WA_RCGGENPOSDRG-LOCKMOD, sy-vline,
  WA_RCGGENPOSDRG-INTRFLG, sy-vline,
  WA_RCGGENPOSDRG-MANDT, sy-vline,
  WA_RCGGENPOSDRG-RECN, sy-vline,
  WA_RCGGENPOSDRG-ACTN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGGENPOSDRG 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_RCGGENPOSDRG 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_RCGGENPOSDRG INTO WA_RCGGENPOSDRG.


*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 RECN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCGGENPOSDRG-RECN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGGENPOSDRG-RECN.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

*Conversion exit SPEC1, internal->external for field SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_RCGGENPOSDRG-SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGGENPOSDRG-SUBID.
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_RCGGENPOSDRG_STR, 
ESNTFLG TYPE STRING,
MARKFLG TYPE STRING,
SELEFLG TYPE STRING,
LINENO TYPE STRING,
LINEMOD TYPE STRING,
CHCOFLG TYPE STRING,
LOCKMOD TYPE STRING,
INTRFLG TYPE STRING,
MANDT TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
AENNR TYPE STRING,
DELFLG TYPE STRING,
PARKFLG TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
SRSID TYPE STRING,
OWNID TYPE STRING,
RECNROOT TYPE STRING,
RECNTVA TYPE STRING,
COMPCAT TYPE STRING,
RECNCMP TYPE STRING,
PRECL TYPE STRING,
COMPLOW TYPE STRING,
PRECU TYPE STRING,
COMPUPP TYPE STRING,
COMPAVG TYPE STRING,
COMPEXP TYPE STRING,
ORD TYPE STRING,
COMPLOWDEC TYPE STRING,
COMPUPPDEC TYPE STRING,
COMPAVGDEC TYPE STRING,
COMPEXCVAL TYPE STRING,
UPD_CMP TYPE STRING,
MATNR TYPE STRING,
ALPGR TYPE STRING,
PREF_ALT TYPE STRING,
NOT_REL_FOR_REG TYPE STRING,
NOT_REL_FOR_CHCK TYPE STRING,
COMPNAM TYPE STRING,
SUBID TYPE STRING,
IDENT1 TYPE STRING,
IDENT2 TYPE STRING,
ESTCAT TYPE STRING,
ESTNAM TYPE STRING,
RQSTFLG TYPE STRING,
COMPLOWTXT TYPE STRING,
COMPUPPTXT TYPE STRING,
COMPAVGTXT TYPE STRING,
IDENT3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGGENPOSDRG_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_RCGGENPOSDRG_STR-ESNTFLG sy-vline 
WA_RCGGENPOSDRG_STR-MARKFLG sy-vline 
WA_RCGGENPOSDRG_STR-SELEFLG sy-vline 
WA_RCGGENPOSDRG_STR-LINENO sy-vline 
WA_RCGGENPOSDRG_STR-LINEMOD sy-vline 
WA_RCGGENPOSDRG_STR-CHCOFLG sy-vline 
WA_RCGGENPOSDRG_STR-LOCKMOD sy-vline 
WA_RCGGENPOSDRG_STR-INTRFLG sy-vline 
WA_RCGGENPOSDRG_STR-MANDT sy-vline 
WA_RCGGENPOSDRG_STR-RECN sy-vline 
WA_RCGGENPOSDRG_STR-ACTN sy-vline 
WA_RCGGENPOSDRG_STR-VALFR sy-vline 
WA_RCGGENPOSDRG_STR-VALTO sy-vline 
WA_RCGGENPOSDRG_STR-AENNR sy-vline 
WA_RCGGENPOSDRG_STR-DELFLG sy-vline 
WA_RCGGENPOSDRG_STR-PARKFLG sy-vline 
WA_RCGGENPOSDRG_STR-CRDAT sy-vline 
WA_RCGGENPOSDRG_STR-CRNAM sy-vline 
WA_RCGGENPOSDRG_STR-UPDDAT sy-vline 
WA_RCGGENPOSDRG_STR-UPDNAM sy-vline 
WA_RCGGENPOSDRG_STR-SRSID sy-vline 
WA_RCGGENPOSDRG_STR-OWNID sy-vline 
WA_RCGGENPOSDRG_STR-RECNROOT sy-vline 
WA_RCGGENPOSDRG_STR-RECNTVA sy-vline 
WA_RCGGENPOSDRG_STR-COMPCAT sy-vline 
WA_RCGGENPOSDRG_STR-RECNCMP sy-vline 
WA_RCGGENPOSDRG_STR-PRECL sy-vline 
WA_RCGGENPOSDRG_STR-COMPLOW sy-vline 
WA_RCGGENPOSDRG_STR-PRECU sy-vline 
WA_RCGGENPOSDRG_STR-COMPUPP sy-vline 
WA_RCGGENPOSDRG_STR-COMPAVG sy-vline 
WA_RCGGENPOSDRG_STR-COMPEXP sy-vline 
WA_RCGGENPOSDRG_STR-ORD sy-vline 
WA_RCGGENPOSDRG_STR-COMPLOWDEC sy-vline 
WA_RCGGENPOSDRG_STR-COMPUPPDEC sy-vline 
WA_RCGGENPOSDRG_STR-COMPAVGDEC sy-vline 
WA_RCGGENPOSDRG_STR-COMPEXCVAL sy-vline 
WA_RCGGENPOSDRG_STR-UPD_CMP sy-vline 
WA_RCGGENPOSDRG_STR-MATNR sy-vline 
WA_RCGGENPOSDRG_STR-ALPGR sy-vline 
WA_RCGGENPOSDRG_STR-PREF_ALT sy-vline 
WA_RCGGENPOSDRG_STR-NOT_REL_FOR_REG sy-vline 
WA_RCGGENPOSDRG_STR-NOT_REL_FOR_CHCK sy-vline 
WA_RCGGENPOSDRG_STR-COMPNAM sy-vline 
WA_RCGGENPOSDRG_STR-SUBID sy-vline 
WA_RCGGENPOSDRG_STR-IDENT1 sy-vline 
WA_RCGGENPOSDRG_STR-IDENT2 sy-vline 
WA_RCGGENPOSDRG_STR-ESTCAT sy-vline 
WA_RCGGENPOSDRG_STR-ESTNAM sy-vline 
WA_RCGGENPOSDRG_STR-RQSTFLG sy-vline 
WA_RCGGENPOSDRG_STR-COMPLOWTXT sy-vline 
WA_RCGGENPOSDRG_STR-COMPUPPTXT sy-vline 
WA_RCGGENPOSDRG_STR-COMPAVGTXT sy-vline 
WA_RCGGENPOSDRG_STR-IDENT3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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