ABAP Select data from SAP table RJKSDCL_ISM_SD_LOG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJKSDCL_ISM_SD_LOG
*  INTO TABLE @DATA(IT_RJKSDCL_ISM_SD_LOG2).
*--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_RJKSDCL_ISM_SD_LOG INDEX 1 INTO DATA(WA_RJKSDCL_ISM_SD_LOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJKSDCL_ISM_SD_LOG>-LEVEL1 = 1.
<RJKSDCL_ISM_SD_LOG>-LEVEL2 = 1.
<RJKSDCL_ISM_SD_LOG>-LEVEL3 = 1.
<RJKSDCL_ISM_SD_LOG>-LEVEL4 = 1.
<RJKSDCL_ISM_SD_LOG>-EXTEND1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJKSDCL_ISM_SD_LOG-EXTEND2, sy-vline,
  WA_RJKSDCL_ISM_SD_LOG-USEREXITP, sy-vline,
  WA_RJKSDCL_ISM_SD_LOG-USEREXITF, sy-vline,
  WA_RJKSDCL_ISM_SD_LOG-USEREXITT, sy-vline,
  WA_RJKSDCL_ISM_SD_LOG-TYPE, sy-vline,
  WA_RJKSDCL_ISM_SD_LOG-ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJKSDCL_ISM_SD_LOG 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_RJKSDCL_ISM_SD_LOG 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_RJKSDCL_ISM_SD_LOG INTO WA_RJKSDCL_ISM_SD_LOG.


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

*Conversion exit ALPHA, internal->external for field IDENTIFICATION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJKSDCL_ISM_SD_LOG-IDENTIFICATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJKSDCL_ISM_SD_LOG-IDENTIFICATION.
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_RJKSDCL_ISM_SD_LOG_STR, 
LEVEL1 TYPE STRING,
LEVEL2 TYPE STRING,
LEVEL3 TYPE STRING,
LEVEL4 TYPE STRING,
EXTEND1 TYPE STRING,
EXTEND2 TYPE STRING,
USEREXITP TYPE STRING,
USEREXITF TYPE STRING,
USEREXITT TYPE STRING,
TYPE TYPE STRING,
ID TYPE STRING,
NUMBER TYPE STRING,
MESSAGE TYPE STRING,
LOG_NO TYPE STRING,
LOG_MSG_NO TYPE STRING,
MESSAGE_V1 TYPE STRING,
MESSAGE_V2 TYPE STRING,
MESSAGE_V3 TYPE STRING,
MESSAGE_V4 TYPE STRING,
PARAMETER TYPE STRING,
ROW TYPE STRING,
FIELD TYPE STRING,
SYSTEM TYPE STRING,
PROBCLASS TYPE STRING,
SUBOBJECT TYPE STRING,
IDENTIFICATION TYPE STRING,
INDEX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJKSDCL_ISM_SD_LOG_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_RJKSDCL_ISM_SD_LOG_STR-LEVEL1 sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-LEVEL2 sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-LEVEL3 sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-LEVEL4 sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-EXTEND1 sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-EXTEND2 sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-USEREXITP sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-USEREXITF sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-USEREXITT sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-TYPE sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-ID sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-NUMBER sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-MESSAGE sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-LOG_NO sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-LOG_MSG_NO sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-MESSAGE_V1 sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-MESSAGE_V2 sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-MESSAGE_V3 sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-MESSAGE_V4 sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-PARAMETER sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-ROW sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-FIELD sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-SYSTEM sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-PROBCLASS sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-SUBOBJECT sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-IDENTIFICATION sy-vline 
WA_RJKSDCL_ISM_SD_LOG_STR-INDEX sy-vline      INTO ld_text SEPARATED BY SPACE.

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