ABAP Select data from SAP table MCEXLOG_02ACC into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP MCEXLOG_02ACC 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 MCEXLOG_02ACC. 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 MCEXLOG_02ACC 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_MCEXLOG_02ACC TYPE STANDARD TABLE OF MCEXLOG_02ACC,
      WA_MCEXLOG_02ACC TYPE MCEXLOG_02ACC,
      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: <MCEXLOG_02ACC> TYPE MCEXLOG_02ACC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MCEXLOG_02ACC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MCEXLOG_02ACC
  INTO TABLE IT_MCEXLOG_02ACC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCEXLOG_02ACC
*  INTO TABLE @DATA(IT_MCEXLOG_02ACC2).
*--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_MCEXLOG_02ACC INDEX 1 INTO DATA(WA_MCEXLOG_02ACC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MCEXLOG_02ACC ASSIGNING <MCEXLOG_02ACC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCEXLOG_02ACC>-TCODE = 1.
<MCEXLOG_02ACC>-DATUM = 1.
<MCEXLOG_02ACC>-UZEIT = 1.
<MCEXLOG_02ACC>-UNAME = 1.
<MCEXLOG_02ACC>-HOST = 1.

ENDLOOP.

LOOP AT IT_MCEXLOG_02ACC INTO WA_MCEXLOG_02ACC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCEXLOG_02ACC-ROCANCEL, sy-vline,
  WA_MCEXLOG_02ACC-EBELN, sy-vline,
  WA_MCEXLOG_02ACC-EBELP, sy-vline,
  WA_MCEXLOG_02ACC-ZEKKN, sy-vline,
  WA_MCEXLOG_02ACC-BWVORG, sy-vline,
  WA_MCEXLOG_02ACC-EKGRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCEXLOG_02ACC 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_MCEXLOG_02ACC 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_MCEXLOG_02ACC INTO WA_MCEXLOG_02ACC.


*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 EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCEXLOG_02ACC-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEXLOG_02ACC-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MCEXLOG_02ACC-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEXLOG_02ACC-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MCEXLOG_02ACC-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEXLOG_02ACC-MEINS.
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_MCEXLOG_02ACC_STR, 
TCODE TYPE STRING,
DATUM TYPE STRING,
UZEIT TYPE STRING,
UNAME TYPE STRING,
HOST TYPE STRING,
ROCANCEL TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ZEKKN TYPE STRING,
BWVORG TYPE STRING,
EKGRP TYPE STRING,
EKORG TYPE STRING,
WERKS TYPE STRING,
BEDAT TYPE STRING,
KNTTP TYPE STRING,
MATNR TYPE STRING,
MEINS TYPE STRING,
MENGE TYPE STRING,
NETPR TYPE STRING,
NETWR TYPE STRING,
EFFWR TYPE STRING,
WAERS TYPE STRING,
TWRKZ TYPE STRING,
VRTKZ TYPE STRING,
VPROZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCEXLOG_02ACC_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_MCEXLOG_02ACC_STR-TCODE sy-vline 
WA_MCEXLOG_02ACC_STR-DATUM sy-vline 
WA_MCEXLOG_02ACC_STR-UZEIT sy-vline 
WA_MCEXLOG_02ACC_STR-UNAME sy-vline 
WA_MCEXLOG_02ACC_STR-HOST sy-vline 
WA_MCEXLOG_02ACC_STR-ROCANCEL sy-vline 
WA_MCEXLOG_02ACC_STR-EBELN sy-vline 
WA_MCEXLOG_02ACC_STR-EBELP sy-vline 
WA_MCEXLOG_02ACC_STR-ZEKKN sy-vline 
WA_MCEXLOG_02ACC_STR-BWVORG sy-vline 
WA_MCEXLOG_02ACC_STR-EKGRP sy-vline 
WA_MCEXLOG_02ACC_STR-EKORG sy-vline 
WA_MCEXLOG_02ACC_STR-WERKS sy-vline 
WA_MCEXLOG_02ACC_STR-BEDAT sy-vline 
WA_MCEXLOG_02ACC_STR-KNTTP sy-vline 
WA_MCEXLOG_02ACC_STR-MATNR sy-vline 
WA_MCEXLOG_02ACC_STR-MEINS sy-vline 
WA_MCEXLOG_02ACC_STR-MENGE sy-vline 
WA_MCEXLOG_02ACC_STR-NETPR sy-vline 
WA_MCEXLOG_02ACC_STR-NETWR sy-vline 
WA_MCEXLOG_02ACC_STR-EFFWR sy-vline 
WA_MCEXLOG_02ACC_STR-WAERS sy-vline 
WA_MCEXLOG_02ACC_STR-TWRKZ sy-vline 
WA_MCEXLOG_02ACC_STR-VRTKZ sy-vline 
WA_MCEXLOG_02ACC_STR-VPROZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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