ABAP Select data from SAP table ROIK37S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ROIK37S 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 ROIK37S. 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 ROIK37S 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_ROIK37S TYPE STANDARD TABLE OF ROIK37S,
      WA_ROIK37S TYPE ROIK37S,
      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: <ROIK37S> TYPE ROIK37S.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ROIK37S.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ROIK37S
  INTO TABLE IT_ROIK37S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIK37S
*  INTO TABLE @DATA(IT_ROIK37S2).
*--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_ROIK37S INDEX 1 INTO DATA(WA_ROIK37S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ROIK37S ASSIGNING <ROIK37S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIK37S>-MANDT = 1.
<ROIK37S>-VBTYP = 1.
<ROIK37S>-VBELN = 1.
<ROIK37S>-POSNR = 1.
<ROIK37S>-COUNTER = 1.

ENDLOOP.

LOOP AT IT_ROIK37S INTO WA_ROIK37S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIK37S-APPLIC, sy-vline,
  WA_ROIK37S-SOCNR, sy-vline,
  WA_ROIK37S-SOCAM, sy-vline,
  WA_ROIK37S-OWNOBJ, sy-vline,
  WA_ROIK37S-SUBOBJ, sy-vline,
  WA_ROIK37S-SHNUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIK37S 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_ROIK37S 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_ROIK37S INTO WA_ROIK37S.


*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_ROIK37S-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIK37S-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SHNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIK37S-SHNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIK37S-SHNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEDST
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ROIK37S-MEDST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIK37S-MEDST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXT_DOC_NR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIK37S-EXT_DOC_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIK37S-EXT_DOC_NR.
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_ROIK37S_STR, 
MANDT TYPE STRING,
VBTYP TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
COUNTER TYPE STRING,
APPLIC TYPE STRING,
SOCNR TYPE STRING,
SOCAM TYPE STRING,
OWNOBJ TYPE STRING,
SUBOBJ TYPE STRING,
SHNUMBER TYPE STRING,
DISTZ TYPE STRING,
MEDST TYPE STRING,
SHIFT_STDT TYPE STRING,
ETA TYPE STRING,
EDA TYPE STRING,
EXT_DOC_NR TYPE STRING,
TIME_FRAME TYPE STRING,
FROMTIME TYPE STRING,
TOTIME TYPE STRING,
TZONE TYPE STRING,
TF_DATE TYPE STRING,
INVERT TYPE STRING,
INCLOSE TYPE STRING,
TO_DATE TYPE STRING,
FROMDATE TYPE STRING,
TIME_WIND TYPE STRING,
TODATE TYPE STRING,
SEL TYPE STRING,
UPDATEFLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIK37S_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_ROIK37S_STR-MANDT sy-vline 
WA_ROIK37S_STR-VBTYP sy-vline 
WA_ROIK37S_STR-VBELN sy-vline 
WA_ROIK37S_STR-POSNR sy-vline 
WA_ROIK37S_STR-COUNTER sy-vline 
WA_ROIK37S_STR-APPLIC sy-vline 
WA_ROIK37S_STR-SOCNR sy-vline 
WA_ROIK37S_STR-SOCAM sy-vline 
WA_ROIK37S_STR-OWNOBJ sy-vline 
WA_ROIK37S_STR-SUBOBJ sy-vline 
WA_ROIK37S_STR-SHNUMBER sy-vline 
WA_ROIK37S_STR-DISTZ sy-vline 
WA_ROIK37S_STR-MEDST sy-vline 
WA_ROIK37S_STR-SHIFT_STDT sy-vline 
WA_ROIK37S_STR-ETA sy-vline 
WA_ROIK37S_STR-EDA sy-vline 
WA_ROIK37S_STR-EXT_DOC_NR sy-vline 
WA_ROIK37S_STR-TIME_FRAME sy-vline 
WA_ROIK37S_STR-FROMTIME sy-vline 
WA_ROIK37S_STR-TOTIME sy-vline 
WA_ROIK37S_STR-TZONE sy-vline 
WA_ROIK37S_STR-TF_DATE sy-vline 
WA_ROIK37S_STR-INVERT sy-vline 
WA_ROIK37S_STR-INCLOSE sy-vline 
WA_ROIK37S_STR-TO_DATE sy-vline 
WA_ROIK37S_STR-FROMDATE sy-vline 
WA_ROIK37S_STR-TIME_WIND sy-vline 
WA_ROIK37S_STR-TODATE sy-vline 
WA_ROIK37S_STR-SEL sy-vline 
WA_ROIK37S_STR-UPDATEFLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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