ABAP Select data from SAP table CRMS4_OBJLINKPRE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CRMS4_OBJLINKPRE 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 CRMS4_OBJLINKPRE. 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 CRMS4_OBJLINKPRE 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_CRMS4_OBJLINKPRE TYPE STANDARD TABLE OF CRMS4_OBJLINKPRE,
      WA_CRMS4_OBJLINKPRE TYPE CRMS4_OBJLINKPRE,
      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: <CRMS4_OBJLINKPRE> TYPE CRMS4_OBJLINKPRE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CRMS4_OBJLINKPRE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CRMS4_OBJLINKPRE
  INTO TABLE IT_CRMS4_OBJLINKPRE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMS4_OBJLINKPRE
*  INTO TABLE @DATA(IT_CRMS4_OBJLINKPRE2).
*--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_CRMS4_OBJLINKPRE INDEX 1 INTO DATA(WA_CRMS4_OBJLINKPRE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CRMS4_OBJLINKPRE ASSIGNING <CRMS4_OBJLINKPRE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMS4_OBJLINKPRE>-MANDT = 1.
<CRMS4_OBJLINKPRE>-RELATIONID = 1.
<CRMS4_OBJLINKPRE>-POSNO = 1.
<CRMS4_OBJLINKPRE>-BRELTYP = 1.
<CRMS4_OBJLINKPRE>-ATTRIBUT = 1.

ENDLOOP.

LOOP AT IT_CRMS4_OBJLINKPRE INTO WA_CRMS4_OBJLINKPRE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMS4_OBJLINKPRE-VONA_KIND, sy-vline,
  WA_CRMS4_OBJLINKPRE-INVALID, sy-vline,
  WA_CRMS4_OBJLINKPRE-SECONDARY, sy-vline,
  WA_CRMS4_OBJLINKPRE-SEQNO, sy-vline,
  WA_CRMS4_OBJLINKPRE-PREDECESSOR_GUID, sy-vline,
  WA_CRMS4_OBJLINKPRE-PREDECESSOR_KEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRMS4_OBJLINKPRE 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_CRMS4_OBJLINKPRE 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_CRMS4_OBJLINKPRE INTO WA_CRMS4_OBJLINKPRE.


*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 PREDECESSOR_LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRMS4_OBJLINKPRE-PREDECESSOR_LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMS4_OBJLINKPRE-PREDECESSOR_LOGSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SUCCESSOR_LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRMS4_OBJLINKPRE-SUCCESSOR_LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMS4_OBJLINKPRE-SUCCESSOR_LOGSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LEAD_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRMS4_OBJLINKPRE-LEAD_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMS4_OBJLINKPRE-LEAD_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LEAD_DES_LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_CRMS4_OBJLINKPRE-LEAD_DES_LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMS4_OBJLINKPRE-LEAD_DES_LANGUAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OPPT_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRMS4_OBJLINKPRE-OPPT_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMS4_OBJLINKPRE-OPPT_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field OPPT_DES_LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_CRMS4_OBJLINKPRE-OPPT_DES_LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMS4_OBJLINKPRE-OPPT_DES_LANGUAGE.
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_CRMS4_OBJLINKPRE_STR, 
MANDT TYPE STRING,
RELATIONID TYPE STRING,
POSNO TYPE STRING,
BRELTYP TYPE STRING,
ATTRIBUT TYPE STRING,
VONA_KIND TYPE STRING,
INVALID TYPE STRING,
SECONDARY TYPE STRING,
SEQNO TYPE STRING,
PREDECESSOR_GUID TYPE STRING,
PREDECESSOR_KEY TYPE STRING,
PREDECESSOR_OBJECT_TYPE TYPE STRING,
PREDECESSOR_LOGSYS TYPE STRING,
SUCCESSOR_GUID TYPE STRING,
SUCCESSOR_KEY TYPE STRING,
SUCCESSOR_OBJECT_TYPE TYPE STRING,
SUCCESSOR_LOGSYS TYPE STRING,
VOUCHER_CODE TYPE STRING,
DOC_INFO TYPE STRING,
LEAD_OBJECT_TYPE TYPE STRING,
LEAD_ID TYPE STRING,
LEAD_GUID TYPE STRING,
LEAD_DES TYPE STRING,
LEAD_DES_UC TYPE STRING,
LEAD_DES_LANGUAGE TYPE STRING,
OPPT_OBJECT_TYPE TYPE STRING,
OPPT_ID TYPE STRING,
OPPT_GUID TYPE STRING,
OPPT_DES TYPE STRING,
OPPT_DES_UC TYPE STRING,
OPPT_DES_LANGUAGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMS4_OBJLINKPRE_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_CRMS4_OBJLINKPRE_STR-MANDT sy-vline 
WA_CRMS4_OBJLINKPRE_STR-RELATIONID sy-vline 
WA_CRMS4_OBJLINKPRE_STR-POSNO sy-vline 
WA_CRMS4_OBJLINKPRE_STR-BRELTYP sy-vline 
WA_CRMS4_OBJLINKPRE_STR-ATTRIBUT sy-vline 
WA_CRMS4_OBJLINKPRE_STR-VONA_KIND sy-vline 
WA_CRMS4_OBJLINKPRE_STR-INVALID sy-vline 
WA_CRMS4_OBJLINKPRE_STR-SECONDARY sy-vline 
WA_CRMS4_OBJLINKPRE_STR-SEQNO sy-vline 
WA_CRMS4_OBJLINKPRE_STR-PREDECESSOR_GUID sy-vline 
WA_CRMS4_OBJLINKPRE_STR-PREDECESSOR_KEY sy-vline 
WA_CRMS4_OBJLINKPRE_STR-PREDECESSOR_OBJECT_TYPE sy-vline 
WA_CRMS4_OBJLINKPRE_STR-PREDECESSOR_LOGSYS sy-vline 
WA_CRMS4_OBJLINKPRE_STR-SUCCESSOR_GUID sy-vline 
WA_CRMS4_OBJLINKPRE_STR-SUCCESSOR_KEY sy-vline 
WA_CRMS4_OBJLINKPRE_STR-SUCCESSOR_OBJECT_TYPE sy-vline 
WA_CRMS4_OBJLINKPRE_STR-SUCCESSOR_LOGSYS sy-vline 
WA_CRMS4_OBJLINKPRE_STR-VOUCHER_CODE sy-vline 
WA_CRMS4_OBJLINKPRE_STR-DOC_INFO sy-vline 
WA_CRMS4_OBJLINKPRE_STR-LEAD_OBJECT_TYPE sy-vline 
WA_CRMS4_OBJLINKPRE_STR-LEAD_ID sy-vline 
WA_CRMS4_OBJLINKPRE_STR-LEAD_GUID sy-vline 
WA_CRMS4_OBJLINKPRE_STR-LEAD_DES sy-vline 
WA_CRMS4_OBJLINKPRE_STR-LEAD_DES_UC sy-vline 
WA_CRMS4_OBJLINKPRE_STR-LEAD_DES_LANGUAGE sy-vline 
WA_CRMS4_OBJLINKPRE_STR-OPPT_OBJECT_TYPE sy-vline 
WA_CRMS4_OBJLINKPRE_STR-OPPT_ID sy-vline 
WA_CRMS4_OBJLINKPRE_STR-OPPT_GUID sy-vline 
WA_CRMS4_OBJLINKPRE_STR-OPPT_DES sy-vline 
WA_CRMS4_OBJLINKPRE_STR-OPPT_DES_UC sy-vline 
WA_CRMS4_OBJLINKPRE_STR-OPPT_DES_LANGUAGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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