ABAP Select data from SAP table RDGMDREP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RDGMDREP
*  INTO TABLE @DATA(IT_RDGMDREP2).
*--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_RDGMDREP INDEX 1 INTO DATA(WA_RDGMDREP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RDGMDREP>-MATNR = 1.
<RDGMDREP>-MAKTX = 1.
<RDGMDREP>-LWDG = 1.
<RDGMDREP>-LWDGN = 1.
<RDGMDREP>-AENNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RDGMDREP-AETXT, sy-vline,
  WA_RDGMDREP-VALFR, sy-vline,
  WA_RDGMDREP-VALTO, sy-vline,
  WA_RDGMDREP-MOT, sy-vline,
  WA_RDGMDREP-MOTD, sy-vline,
  WA_RDGMDREP-RVLID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RDGMDREP 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_RDGMDREP 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_RDGMDREP INTO WA_RDGMDREP.


*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 MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RDGMDREP-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RDGMDREP-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field ACTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RDGMDREP-ACTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RDGMDREP-ACTN.
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_RDGMDREP_STR, 
MATNR TYPE STRING,
MAKTX TYPE STRING,
LWDG TYPE STRING,
LWDGN TYPE STRING,
AENNR TYPE STRING,
AETXT TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
MOT TYPE STRING,
MOTD TYPE STRING,
RVLID TYPE STRING,
RVLNAM TYPE STRING,
DGNHM TYPE STRING,
NHME TYPE STRING,
DGTNA TYPE STRING,
TKUI TYPE STRING,
DGNU TYPE STRING,
PDGNUDPRED TYPE STRING,
DGNAD TYPE STRING,
PDGNUDSUFD TYPE STRING,
PRES1 TYPE STRING,
DGRES1D TYPE STRING,
PRES2 TYPE STRING,
DGRES2D TYPE STRING,
PRES3 TYPE STRING,
DGRES3D TYPE STRING,
PREMP1 TYPE STRING,
DGREMPD TYPE STRING,
PREMP2 TYPE STRING,
DGREMP2D TYPE STRING,
PRERQ1 TYPE STRING,
DGRERQ1D TYPE STRING,
PRERQ2 TYPE STRING,
DGRERQ2D TYPE STRING,
DGCL TYPE STRING,
DGCLD TYPE STRING,
DGSC TYPE STRING,
SDBC TYPE STRING,
LDBC TYPE STRING,
LDBCD TYPE STRING,
PGRO TYPE STRING,
SLBE TYPE STRING,
HNU TYPE STRING,
HNUD TYPE STRING,
HPN1 TYPE STRING,
HPD1 TYPE STRING,
HPN2 TYPE STRING,
HPD2 TYPE STRING,
HPN3 TYPE STRING,
HPD3 TYPE STRING,
HPN4 TYPE STRING,
HPD4 TYPE STRING,
HPN5 TYPE STRING,
HPD5 TYPE STRING,
HPN6 TYPE STRING,
HPD6 TYPE STRING,
HPN7 TYPE STRING,
HPD7 TYPE STRING,
PIN TYPE STRING,
PIND TYPE STRING,
PINLQ TYPE STRING,
PINLQD TYPE STRING,
EINU TYPE STRING,
EICN TYPE STRING,
MAPOL TYPE STRING,
MAPOLD TYPE STRING,
TUNNEL_RESTRICTION_CODE TYPE STRING,
DGWOS TYPE STRING,
DGWOSD TYPE STRING,
PARKFLG TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RDGMDREP_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_RDGMDREP_STR-MATNR sy-vline 
WA_RDGMDREP_STR-MAKTX sy-vline 
WA_RDGMDREP_STR-LWDG sy-vline 
WA_RDGMDREP_STR-LWDGN sy-vline 
WA_RDGMDREP_STR-AENNR sy-vline 
WA_RDGMDREP_STR-AETXT sy-vline 
WA_RDGMDREP_STR-VALFR sy-vline 
WA_RDGMDREP_STR-VALTO sy-vline 
WA_RDGMDREP_STR-MOT sy-vline 
WA_RDGMDREP_STR-MOTD sy-vline 
WA_RDGMDREP_STR-RVLID sy-vline 
WA_RDGMDREP_STR-RVLNAM sy-vline 
WA_RDGMDREP_STR-DGNHM sy-vline 
WA_RDGMDREP_STR-NHME sy-vline 
WA_RDGMDREP_STR-DGTNA sy-vline 
WA_RDGMDREP_STR-TKUI sy-vline 
WA_RDGMDREP_STR-DGNU sy-vline 
WA_RDGMDREP_STR-PDGNUDPRED sy-vline 
WA_RDGMDREP_STR-DGNAD sy-vline 
WA_RDGMDREP_STR-PDGNUDSUFD sy-vline 
WA_RDGMDREP_STR-PRES1 sy-vline 
WA_RDGMDREP_STR-DGRES1D sy-vline 
WA_RDGMDREP_STR-PRES2 sy-vline 
WA_RDGMDREP_STR-DGRES2D sy-vline 
WA_RDGMDREP_STR-PRES3 sy-vline 
WA_RDGMDREP_STR-DGRES3D sy-vline 
WA_RDGMDREP_STR-PREMP1 sy-vline 
WA_RDGMDREP_STR-DGREMPD sy-vline 
WA_RDGMDREP_STR-PREMP2 sy-vline 
WA_RDGMDREP_STR-DGREMP2D sy-vline 
WA_RDGMDREP_STR-PRERQ1 sy-vline 
WA_RDGMDREP_STR-DGRERQ1D sy-vline 
WA_RDGMDREP_STR-PRERQ2 sy-vline 
WA_RDGMDREP_STR-DGRERQ2D sy-vline 
WA_RDGMDREP_STR-DGCL sy-vline 
WA_RDGMDREP_STR-DGCLD sy-vline 
WA_RDGMDREP_STR-DGSC sy-vline 
WA_RDGMDREP_STR-SDBC sy-vline 
WA_RDGMDREP_STR-LDBC sy-vline 
WA_RDGMDREP_STR-LDBCD sy-vline 
WA_RDGMDREP_STR-PGRO sy-vline 
WA_RDGMDREP_STR-SLBE sy-vline 
WA_RDGMDREP_STR-HNU sy-vline 
WA_RDGMDREP_STR-HNUD sy-vline 
WA_RDGMDREP_STR-HPN1 sy-vline 
WA_RDGMDREP_STR-HPD1 sy-vline 
WA_RDGMDREP_STR-HPN2 sy-vline 
WA_RDGMDREP_STR-HPD2 sy-vline 
WA_RDGMDREP_STR-HPN3 sy-vline 
WA_RDGMDREP_STR-HPD3 sy-vline 
WA_RDGMDREP_STR-HPN4 sy-vline 
WA_RDGMDREP_STR-HPD4 sy-vline 
WA_RDGMDREP_STR-HPN5 sy-vline 
WA_RDGMDREP_STR-HPD5 sy-vline 
WA_RDGMDREP_STR-HPN6 sy-vline 
WA_RDGMDREP_STR-HPD6 sy-vline 
WA_RDGMDREP_STR-HPN7 sy-vline 
WA_RDGMDREP_STR-HPD7 sy-vline 
WA_RDGMDREP_STR-PIN sy-vline 
WA_RDGMDREP_STR-PIND sy-vline 
WA_RDGMDREP_STR-PINLQ sy-vline 
WA_RDGMDREP_STR-PINLQD sy-vline 
WA_RDGMDREP_STR-EINU sy-vline 
WA_RDGMDREP_STR-EICN sy-vline 
WA_RDGMDREP_STR-MAPOL sy-vline 
WA_RDGMDREP_STR-MAPOLD sy-vline 
WA_RDGMDREP_STR-TUNNEL_RESTRICTION_CODE sy-vline 
WA_RDGMDREP_STR-DGWOS sy-vline 
WA_RDGMDREP_STR-DGWOSD sy-vline 
WA_RDGMDREP_STR-PARKFLG sy-vline 
WA_RDGMDREP_STR-RECN sy-vline 
WA_RDGMDREP_STR-ACTN sy-vline      INTO ld_text SEPARATED BY SPACE.

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