ABAP Select data from SAP table RECN_FOLLOW_CONTRACT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RECN_FOLLOW_CONTRACT
*  INTO TABLE @DATA(IT_RECN_FOLLOW_CONTRACT2).
*--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_RECN_FOLLOW_CONTRACT INDEX 1 INTO DATA(WA_RECN_FOLLOW_CONTRACT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RECN_FOLLOW_CONTRACT>-RECNBEG = 1.
<RECN_FOLLOW_CONTRACT>-RECNEND1ST = 1.
<RECN_FOLLOW_CONTRACT>-PARTNER = 1.
<RECN_FOLLOW_CONTRACT>-CREATEPARTNER = 1.
<RECN_FOLLOW_CONTRACT>-TAKEMAINPARTNER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RECN_FOLLOW_CONTRACT-UNIQUECOND, sy-vline,
  WA_RECN_FOLLOW_CONTRACT-DEFAULTCOND, sy-vline,
  WA_RECN_FOLLOW_CONTRACT-PREVIOUSRECNBEG, sy-vline,
  WA_RECN_FOLLOW_CONTRACT-PREVIOUSENDED, sy-vline,
  WA_RECN_FOLLOW_CONTRACT-PREVIOUSRECNENDABS, sy-vline,
  WA_RECN_FOLLOW_CONTRACT-PREVIOUSXPESTATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RECN_FOLLOW_CONTRACT 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_RECN_FOLLOW_CONTRACT 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_RECN_FOLLOW_CONTRACT INTO WA_RECN_FOLLOW_CONTRACT.


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

*Conversion exit REDAT, internal->external for field PREVIOUSRECNENDABS
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RECN_FOLLOW_CONTRACT-PREVIOUSRECNENDABS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECN_FOLLOW_CONTRACT-PREVIOUSRECNENDABS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field PREVIOUSRNENDMAX
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RECN_FOLLOW_CONTRACT-PREVIOUSRNENDMAX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECN_FOLLOW_CONTRACT-PREVIOUSRNENDMAX.
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_RECN_FOLLOW_CONTRACT_STR, 
RECNBEG TYPE STRING,
RECNEND1ST TYPE STRING,
PARTNER TYPE STRING,
CREATEPARTNER TYPE STRING,
TAKEMAINPARTNER TYPE STRING,
UNIQUECOND TYPE STRING,
DEFAULTCOND TYPE STRING,
PREVIOUSRECNBEG TYPE STRING,
PREVIOUSENDED TYPE STRING,
PREVIOUSRECNENDABS TYPE STRING,
PREVIOUSXPESTATE TYPE STRING,
PREVIOUSIDENT TYPE STRING,
PREVIOUSRENEWAL TYPE STRING,
PREVIOUSNOTICE TYPE STRING,
PREVIOUSRECNEND1ST TYPE STRING,
PREVIOUSXNOTICE TYPE STRING,
PREVIOUSXRENEWAL TYPE STRING,
PREVIOUSXCONTRACT TYPE STRING,
PREVIOUSACTION TYPE STRING,
PREVIOUSACTIONNOTICE TYPE STRING,
PREVIOUSRNENDMAX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RECN_FOLLOW_CONTRACT_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_RECN_FOLLOW_CONTRACT_STR-RECNBEG sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-RECNEND1ST sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PARTNER sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-CREATEPARTNER sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-TAKEMAINPARTNER sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-UNIQUECOND sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-DEFAULTCOND sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSRECNBEG sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSENDED sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSRECNENDABS sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSXPESTATE sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSIDENT sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSRENEWAL sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSNOTICE sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSRECNEND1ST sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSXNOTICE sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSXRENEWAL sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSXCONTRACT sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSACTION sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSACTIONNOTICE sy-vline 
WA_RECN_FOLLOW_CONTRACT_STR-PREVIOUSRNENDMAX sy-vline      INTO ld_text SEPARATED BY SPACE.

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