ABAP Select data from SAP table RJKWWW_PROTOCOL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJKWWW_PROTOCOL
*  INTO TABLE @DATA(IT_RJKWWW_PROTOCOL2).
*--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_RJKWWW_PROTOCOL INDEX 1 INTO DATA(WA_RJKWWW_PROTOCOL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJKWWW_PROTOCOL>-IAC_TYPE = 1.
<RJKWWW_PROTOCOL>-KEY_IAC = 1.
<RJKWWW_PROTOCOL>-CMETHOD = 1.
<RJKWWW_PROTOCOL>-ERFDATE = 1.
<RJKWWW_PROTOCOL>-ERFTIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJKWWW_PROTOCOL-GPNR, sy-vline,
  WA_RJKWWW_PROTOCOL-VBELN, sy-vline,
  WA_RJKWWW_PROTOCOL-POSNR, sy-vline,
  WA_RJKWWW_PROTOCOL-ZLSCH, sy-vline,
  WA_RJKWWW_PROTOCOL-GUELTIGVON, sy-vline,
  WA_RJKWWW_PROTOCOL-GUELTIGBIS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJKWWW_PROTOCOL 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_RJKWWW_PROTOCOL 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_RJKWWW_PROTOCOL INTO WA_RJKWWW_PROTOCOL.


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

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJKWWW_PROTOCOL-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJKWWW_PROTOCOL-VBELN.
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_RJKWWW_PROTOCOL_STR, 
IAC_TYPE TYPE STRING,
KEY_IAC TYPE STRING,
CMETHOD TYPE STRING,
ERFDATE TYPE STRING,
ERFTIME TYPE STRING,
GPNR TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
ZLSCH TYPE STRING,
GUELTIGVON TYPE STRING,
GUELTIGBIS TYPE STRING,
USERALIAS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJKWWW_PROTOCOL_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_RJKWWW_PROTOCOL_STR-IAC_TYPE sy-vline 
WA_RJKWWW_PROTOCOL_STR-KEY_IAC sy-vline 
WA_RJKWWW_PROTOCOL_STR-CMETHOD sy-vline 
WA_RJKWWW_PROTOCOL_STR-ERFDATE sy-vline 
WA_RJKWWW_PROTOCOL_STR-ERFTIME sy-vline 
WA_RJKWWW_PROTOCOL_STR-GPNR sy-vline 
WA_RJKWWW_PROTOCOL_STR-VBELN sy-vline 
WA_RJKWWW_PROTOCOL_STR-POSNR sy-vline 
WA_RJKWWW_PROTOCOL_STR-ZLSCH sy-vline 
WA_RJKWWW_PROTOCOL_STR-GUELTIGVON sy-vline 
WA_RJKWWW_PROTOCOL_STR-GUELTIGBIS sy-vline 
WA_RJKWWW_PROTOCOL_STR-USERALIAS sy-vline      INTO ld_text SEPARATED BY SPACE.

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