ABAP Select data from SAP table /NAM/JKVABC_RS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /NAM/JKVABC_RS 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 /NAM/JKVABC_RS. 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 /NAM/JKVABC_RS 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_/NAM/JKVABC_RS TYPE STANDARD TABLE OF /NAM/JKVABC_RS,
      WA_/NAM/JKVABC_RS TYPE /NAM/JKVABC_RS,
      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: </NAM/JKVABC_RS> TYPE /NAM/JKVABC_RS.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /NAM/JKVABC_RS
  INTO TABLE IT_/NAM/JKVABC_RS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /NAM/JKVABC_RS
*  INTO TABLE @DATA(IT_/NAM/JKVABC_RS2).
*--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_/NAM/JKVABC_RS INDEX 1 INTO DATA(WA_/NAM/JKVABC_RS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/NAM/JKVABC_RS ASSIGNING </NAM/JKVABC_RS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</NAM/JKVABC_RS>-MANDT = 1.
</NAM/JKVABC_RS>-VBELN = 1.
</NAM/JKVABC_RS>-POSNR = 1.
</NAM/JKVABC_RS>-GV_ADDR = 1.
</NAM/JKVABC_RS>-ADRNR = 1.

ENDLOOP.

LOOP AT IT_/NAM/JKVABC_RS INTO WA_/NAM/JKVABC_RS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/NAM/JKVABC_RS-JPARVW, sy-vline,
  WA_/NAM/JKVABC_RS-PARZA, sy-vline,
  WA_/NAM/JKVABC_RS-PROMNR, sy-vline,
  WA_/NAM/JKVABC_RS-MATNRWERB, sy-vline,
  WA_/NAM/JKVABC_RS-GPVERM, sy-vline,
  WA_/NAM/JKVABC_RS-POSEX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/NAM/JKVABC_RS 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_/NAM/JKVABC_RS 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_/NAM/JKVABC_RS INTO WA_/NAM/JKVABC_RS.


*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 VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/NAM/JKVABC_RS-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/NAM/JKVABC_RS-VBELN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit PARVW, internal->external for field JPARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_/NAM/JKVABC_RS-JPARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/NAM/JKVABC_RS-JPARVW.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field WERBEAKT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/NAM/JKVABC_RS-WERBEAKT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/NAM/JKVABC_RS-WERBEAKT.
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_/NAM/JKVABC_RS_STR, 
MANDT TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
GV_ADDR TYPE STRING,
ADRNR TYPE STRING,
JPARVW TYPE STRING,
PARZA TYPE STRING,
PROMNR TYPE STRING,
MATNRWERB TYPE STRING,
GPVERM TYPE STRING,
POSEX TYPE STRING,
POSNR_UR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
DRERZ TYPE STRING,
PVA TYPE STRING,
LIEFERART TYPE STRING,
KONDA TYPE STRING,
KDGRP TYPE STRING,
BEZPER TYPE STRING,
FKPER TYPE STRING,
PLZ_ORDER TYPE STRING,
GPNR TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
GUELTIGVON TYPE STRING,
GUELTIGBIS TYPE STRING,
GB_ADDR TYPE STRING,
NETWR TYPE STRING,
WAERK TYPE STRING,
WERBEAKT TYPE STRING,
KZWI1 TYPE STRING,
KZWI2 TYPE STRING,
KZWI3 TYPE STRING,
KZWI4 TYPE STRING,
KZWI5 TYPE STRING,
KZWI6 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/NAM/JKVABC_RS_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_/NAM/JKVABC_RS_STR-MANDT sy-vline 
WA_/NAM/JKVABC_RS_STR-VBELN sy-vline 
WA_/NAM/JKVABC_RS_STR-POSNR sy-vline 
WA_/NAM/JKVABC_RS_STR-GV_ADDR sy-vline 
WA_/NAM/JKVABC_RS_STR-ADRNR sy-vline 
WA_/NAM/JKVABC_RS_STR-JPARVW sy-vline 
WA_/NAM/JKVABC_RS_STR-PARZA sy-vline 
WA_/NAM/JKVABC_RS_STR-PROMNR sy-vline 
WA_/NAM/JKVABC_RS_STR-MATNRWERB sy-vline 
WA_/NAM/JKVABC_RS_STR-GPVERM sy-vline 
WA_/NAM/JKVABC_RS_STR-POSEX sy-vline 
WA_/NAM/JKVABC_RS_STR-POSNR_UR sy-vline 
WA_/NAM/JKVABC_RS_STR-VKORG sy-vline 
WA_/NAM/JKVABC_RS_STR-VTWEG sy-vline 
WA_/NAM/JKVABC_RS_STR-SPART sy-vline 
WA_/NAM/JKVABC_RS_STR-DRERZ sy-vline 
WA_/NAM/JKVABC_RS_STR-PVA sy-vline 
WA_/NAM/JKVABC_RS_STR-LIEFERART sy-vline 
WA_/NAM/JKVABC_RS_STR-KONDA sy-vline 
WA_/NAM/JKVABC_RS_STR-KDGRP sy-vline 
WA_/NAM/JKVABC_RS_STR-BEZPER sy-vline 
WA_/NAM/JKVABC_RS_STR-FKPER sy-vline 
WA_/NAM/JKVABC_RS_STR-PLZ_ORDER sy-vline 
WA_/NAM/JKVABC_RS_STR-GPNR sy-vline 
WA_/NAM/JKVABC_RS_STR-NAME1 sy-vline 
WA_/NAM/JKVABC_RS_STR-NAME2 sy-vline 
WA_/NAM/JKVABC_RS_STR-GUELTIGVON sy-vline 
WA_/NAM/JKVABC_RS_STR-GUELTIGBIS sy-vline 
WA_/NAM/JKVABC_RS_STR-GB_ADDR sy-vline 
WA_/NAM/JKVABC_RS_STR-NETWR sy-vline 
WA_/NAM/JKVABC_RS_STR-WAERK sy-vline 
WA_/NAM/JKVABC_RS_STR-WERBEAKT sy-vline 
WA_/NAM/JKVABC_RS_STR-KZWI1 sy-vline 
WA_/NAM/JKVABC_RS_STR-KZWI2 sy-vline 
WA_/NAM/JKVABC_RS_STR-KZWI3 sy-vline 
WA_/NAM/JKVABC_RS_STR-KZWI4 sy-vline 
WA_/NAM/JKVABC_RS_STR-KZWI5 sy-vline 
WA_/NAM/JKVABC_RS_STR-KZWI6 sy-vline      INTO ld_text SEPARATED BY SPACE.

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