ABAP Select data from SAP table MCESUCB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCESUCB
*  INTO TABLE @DATA(IT_MCESUCB2).
*--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_MCESUCB INDEX 1 INTO DATA(WA_MCESUCB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCESUCB>-SUPKZ = 1.
<MCESUCB>-MANDT = 1.
<MCESUCB>-PACKNO = 1.
<MCESUCB>-INTROW = 1.
<MCESUCB>-DEL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCESUCB-EBELN, sy-vline,
  WA_MCESUCB-EBELP, sy-vline,
  WA_MCESUCB-LIMIT, sy-vline,
  WA_MCESUCB-NOLIMIT, sy-vline,
  WA_MCESUCB-ACTVALUE, sy-vline,
  WA_MCESUCB-KTEXT1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCESUCB 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_MCESUCB 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_MCESUCB INTO WA_MCESUCB.


*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_MCESUCB-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCESUCB-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field UCEBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCESUCB-UCEBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCESUCB-UCEBELN.
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_MCESUCB_STR, 
SUPKZ TYPE STRING,
MANDT TYPE STRING,
PACKNO TYPE STRING,
INTROW TYPE STRING,
DEL TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
LIMIT TYPE STRING,
NOLIMIT TYPE STRING,
ACTVALUE TYPE STRING,
KTEXT1 TYPE STRING,
SUB_PACKNO TYPE STRING,
PRS_CHG TYPE STRING,
UCACTVALUE TYPE STRING,
UCEBELN TYPE STRING,
UCEBELP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCESUCB_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_MCESUCB_STR-SUPKZ sy-vline 
WA_MCESUCB_STR-MANDT sy-vline 
WA_MCESUCB_STR-PACKNO sy-vline 
WA_MCESUCB_STR-INTROW sy-vline 
WA_MCESUCB_STR-DEL sy-vline 
WA_MCESUCB_STR-EBELN sy-vline 
WA_MCESUCB_STR-EBELP sy-vline 
WA_MCESUCB_STR-LIMIT sy-vline 
WA_MCESUCB_STR-NOLIMIT sy-vline 
WA_MCESUCB_STR-ACTVALUE sy-vline 
WA_MCESUCB_STR-KTEXT1 sy-vline 
WA_MCESUCB_STR-SUB_PACKNO sy-vline 
WA_MCESUCB_STR-PRS_CHG sy-vline 
WA_MCESUCB_STR-UCACTVALUE sy-vline 
WA_MCESUCB_STR-UCEBELN sy-vline 
WA_MCESUCB_STR-UCEBELP sy-vline      INTO ld_text SEPARATED BY SPACE.

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