ABAP Select data from SAP table AKB_LOGBOOK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AKB_LOGBOOK
*  INTO TABLE @DATA(IT_AKB_LOGBOOK2).
*--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_AKB_LOGBOOK INDEX 1 INTO DATA(WA_AKB_LOGBOOK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AKB_LOGBOOK>-MSGDATE = 1.
<AKB_LOGBOOK>-MSGTIME = 1.
<AKB_LOGBOOK>-PRODUCT = 1.
<AKB_LOGBOOK>-PRODUCT_REL = 1.
<AKB_LOGBOOK>-SERVER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AKB_LOGBOOK-SERVER_REL, sy-vline,
  WA_AKB_LOGBOOK-JOBNAME, sy-vline,
  WA_AKB_LOGBOOK-SUCCESS, sy-vline,
  WA_AKB_LOGBOOK-MSGID, sy-vline,
  WA_AKB_LOGBOOK-MSGNO, sy-vline,
  WA_AKB_LOGBOOK-MSGTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AKB_LOGBOOK 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_AKB_LOGBOOK 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_AKB_LOGBOOK INTO WA_AKB_LOGBOOK.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_AKB_LOGBOOK_STR, 
MSGDATE TYPE STRING,
MSGTIME TYPE STRING,
PRODUCT TYPE STRING,
PRODUCT_REL TYPE STRING,
SERVER TYPE STRING,
SERVER_REL TYPE STRING,
JOBNAME TYPE STRING,
SUCCESS TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGTY TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AKB_LOGBOOK_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_AKB_LOGBOOK_STR-MSGDATE sy-vline 
WA_AKB_LOGBOOK_STR-MSGTIME sy-vline 
WA_AKB_LOGBOOK_STR-PRODUCT sy-vline 
WA_AKB_LOGBOOK_STR-PRODUCT_REL sy-vline 
WA_AKB_LOGBOOK_STR-SERVER sy-vline 
WA_AKB_LOGBOOK_STR-SERVER_REL sy-vline 
WA_AKB_LOGBOOK_STR-JOBNAME sy-vline 
WA_AKB_LOGBOOK_STR-SUCCESS sy-vline 
WA_AKB_LOGBOOK_STR-MSGID sy-vline 
WA_AKB_LOGBOOK_STR-MSGNO sy-vline 
WA_AKB_LOGBOOK_STR-MSGTY sy-vline 
WA_AKB_LOGBOOK_STR-MSGV1 sy-vline 
WA_AKB_LOGBOOK_STR-MSGV2 sy-vline 
WA_AKB_LOGBOOK_STR-MSGV3 sy-vline 
WA_AKB_LOGBOOK_STR-MSGV4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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