ABAP Select data from SAP table KKRVDSTR 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 KKRVDSTR 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 KKRVDSTR. 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 KKRVDSTR 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_KKRVDSTR TYPE STANDARD TABLE OF KKRVDSTR,
      WA_KKRVDSTR TYPE KKRVDSTR,
      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: <KKRVDSTR> TYPE KKRVDSTR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KKRVDSTR
*  INTO TABLE @DATA(IT_KKRVDSTR2).
*--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_KKRVDSTR INDEX 1 INTO DATA(WA_KKRVDSTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KKRVDSTR>-TABNAME = 1.
<KKRVDSTR>-PROCESSOR = 1.
<KKRVDSTR>-NO_GENER = 1.
<KKRVDSTR>-TIMESTAMP = 1.
<KKRVDSTR>-HIART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KKRVDSTR-HIEID, sy-vline,
  WA_KKRVDSTR-VARHIEBG, sy-vline,
  WA_KKRVDSTR-SPRAS, sy-vline,
  WA_KKRVDSTR-ERNAM, sy-vline,
  WA_KKRVDSTR-ERDAT, sy-vline,
  WA_KKRVDSTR-LTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KKRVDSTR 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_KKRVDSTR 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_KKRVDSTR INTO WA_KKRVDSTR.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_KKRVDSTR-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKRVDSTR-SPRAS.
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_KKRVDSTR_STR, 
TABNAME TYPE STRING,
PROCESSOR TYPE STRING,
NO_GENER TYPE STRING,
TIMESTAMP TYPE STRING,
HIART TYPE STRING,
HIEID TYPE STRING,
VARHIEBG TYPE STRING,
SPRAS TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
LTEXT TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
KOKRS TYPE STRING,
OBJWR TYPE STRING,
LOEKZ TYPE STRING,
OBJNR TYPE STRING,
KTEXT TYPE STRING,
CYCLE TYPE STRING,
STATUS_REC TYPE STRING,
STATUS_OBJ TYPE STRING,
BUKRSW_DEL TYPE STRING,
SON_FROM TYPE STRING,
SON_TO TYPE STRING,
OBJ_FROM TYPE STRING,
OBJ_TO TYPE STRING,
ALT TYPE STRING,
UNV TYPE STRING,
UPD TYPE STRING,
DEL TYPE STRING,
INS TYPE STRING,
OBJANZ TYPE STRING,
TIME1 TYPE STRING,
TIME2 TYPE STRING,
TIME3 TYPE STRING,
TIME4 TYPE STRING,
TASK TYPE STRING,
HOST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KKRVDSTR_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_KKRVDSTR_STR-TABNAME sy-vline 
WA_KKRVDSTR_STR-PROCESSOR sy-vline 
WA_KKRVDSTR_STR-NO_GENER sy-vline 
WA_KKRVDSTR_STR-TIMESTAMP sy-vline 
WA_KKRVDSTR_STR-HIART sy-vline 
WA_KKRVDSTR_STR-HIEID sy-vline 
WA_KKRVDSTR_STR-VARHIEBG sy-vline 
WA_KKRVDSTR_STR-SPRAS sy-vline 
WA_KKRVDSTR_STR-ERNAM sy-vline 
WA_KKRVDSTR_STR-ERDAT sy-vline 
WA_KKRVDSTR_STR-LTEXT sy-vline 
WA_KKRVDSTR_STR-BUKRS sy-vline 
WA_KKRVDSTR_STR-GSBER sy-vline 
WA_KKRVDSTR_STR-KOKRS sy-vline 
WA_KKRVDSTR_STR-OBJWR sy-vline 
WA_KKRVDSTR_STR-LOEKZ sy-vline 
WA_KKRVDSTR_STR-OBJNR sy-vline 
WA_KKRVDSTR_STR-KTEXT sy-vline 
WA_KKRVDSTR_STR-CYCLE sy-vline 
WA_KKRVDSTR_STR-STATUS_REC sy-vline 
WA_KKRVDSTR_STR-STATUS_OBJ sy-vline 
WA_KKRVDSTR_STR-BUKRSW_DEL sy-vline 
WA_KKRVDSTR_STR-SON_FROM sy-vline 
WA_KKRVDSTR_STR-SON_TO sy-vline 
WA_KKRVDSTR_STR-OBJ_FROM sy-vline 
WA_KKRVDSTR_STR-OBJ_TO sy-vline 
WA_KKRVDSTR_STR-ALT sy-vline 
WA_KKRVDSTR_STR-UNV sy-vline 
WA_KKRVDSTR_STR-UPD sy-vline 
WA_KKRVDSTR_STR-DEL sy-vline 
WA_KKRVDSTR_STR-INS sy-vline 
WA_KKRVDSTR_STR-OBJANZ sy-vline 
WA_KKRVDSTR_STR-TIME1 sy-vline 
WA_KKRVDSTR_STR-TIME2 sy-vline 
WA_KKRVDSTR_STR-TIME3 sy-vline 
WA_KKRVDSTR_STR-TIME4 sy-vline 
WA_KKRVDSTR_STR-TASK sy-vline 
WA_KKRVDSTR_STR-HOST sy-vline      INTO ld_text SEPARATED BY SPACE.

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