ABAP Select data from SAP table MCESLLB into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MCESLLB 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 MCESLLB. 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 MCESLLB 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_MCESLLB TYPE STANDARD TABLE OF MCESLLB,
      WA_MCESLLB TYPE MCESLLB,
      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: <MCESLLB> TYPE MCESLLB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCESLLB
*  INTO TABLE @DATA(IT_MCESLLB2).
*--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_MCESLLB INDEX 1 INTO DATA(WA_MCESLLB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCESLLB>-SUPKZ = 1.
<MCESLLB>-MANDT = 1.
<MCESLLB>-EBELN = 1.
<MCESLLB>-EBELP = 1.
<MCESLLB>-LBLNI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCESLLB-PACKNO, sy-vline,
  WA_MCESLLB-INTROW, sy-vline,
  WA_MCESLLB-SRVPOS, sy-vline,
  WA_MCESLLB-LBNUM, sy-vline,
  WA_MCESLLB-AUSGB, sy-vline,
  WA_MCESLLB-STLVPOS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCESLLB 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_MCESLLB 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_MCESLLB INTO WA_MCESLLB.


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

*Conversion exit ALPHA, internal->external for field LBLNI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCESLLB-LBLNI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCESLLB-LBLNI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SRVPOS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCESLLB-SRVPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCESLLB-SRVPOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MCESLLB-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCESLLB-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_MCESLLB_STR, 
SUPKZ TYPE STRING,
MANDT TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
LBLNI TYPE STRING,
PACKNO TYPE STRING,
INTROW TYPE STRING,
SRVPOS TYPE STRING,
LBNUM TYPE STRING,
AUSGB TYPE STRING,
STLVPOS TYPE STRING,
EXTSRVNO TYPE STRING,
ASTYP TYPE STRING,
MATKL TYPE STRING,
PERNR TYPE STRING,
PERSEXT TYPE STRING,
LGART TYPE STRING,
BASIC TYPE STRING,
ALTERNAT TYPE STRING,
BIDDER TYPE STRING,
SUPPLE TYPE STRING,
FREEQTY TYPE STRING,
INFORM TYPE STRING,
PAUSCH TYPE STRING,
EVENTUAL TYPE STRING,
ERDAT TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
QUAN TYPE STRING,
QUAN_ENTRY TYPE STRING,
QUAN_ACC TYPE STRING,
QUAN_IV TYPE STRING,
VAL TYPE STRING,
VAL_ES TYPE STRING,
VAL_ACC TYPE STRING,
VAL_ACCUP TYPE STRING,
VAL_ACCUP2 TYPE STRING,
VAL_IV TYPE STRING,
MEINS TYPE STRING,
MWSKZ TYPE STRING,
TXJCD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCESLLB_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_MCESLLB_STR-SUPKZ sy-vline 
WA_MCESLLB_STR-MANDT sy-vline 
WA_MCESLLB_STR-EBELN sy-vline 
WA_MCESLLB_STR-EBELP sy-vline 
WA_MCESLLB_STR-LBLNI sy-vline 
WA_MCESLLB_STR-PACKNO sy-vline 
WA_MCESLLB_STR-INTROW sy-vline 
WA_MCESLLB_STR-SRVPOS sy-vline 
WA_MCESLLB_STR-LBNUM sy-vline 
WA_MCESLLB_STR-AUSGB sy-vline 
WA_MCESLLB_STR-STLVPOS sy-vline 
WA_MCESLLB_STR-EXTSRVNO sy-vline 
WA_MCESLLB_STR-ASTYP sy-vline 
WA_MCESLLB_STR-MATKL sy-vline 
WA_MCESLLB_STR-PERNR sy-vline 
WA_MCESLLB_STR-PERSEXT sy-vline 
WA_MCESLLB_STR-LGART sy-vline 
WA_MCESLLB_STR-BASIC sy-vline 
WA_MCESLLB_STR-ALTERNAT sy-vline 
WA_MCESLLB_STR-BIDDER sy-vline 
WA_MCESLLB_STR-SUPPLE sy-vline 
WA_MCESLLB_STR-FREEQTY sy-vline 
WA_MCESLLB_STR-INFORM sy-vline 
WA_MCESLLB_STR-PAUSCH sy-vline 
WA_MCESLLB_STR-EVENTUAL sy-vline 
WA_MCESLLB_STR-ERDAT sy-vline 
WA_MCESLLB_STR-BLDAT sy-vline 
WA_MCESLLB_STR-BUDAT sy-vline 
WA_MCESLLB_STR-QUAN sy-vline 
WA_MCESLLB_STR-QUAN_ENTRY sy-vline 
WA_MCESLLB_STR-QUAN_ACC sy-vline 
WA_MCESLLB_STR-QUAN_IV sy-vline 
WA_MCESLLB_STR-VAL sy-vline 
WA_MCESLLB_STR-VAL_ES sy-vline 
WA_MCESLLB_STR-VAL_ACC sy-vline 
WA_MCESLLB_STR-VAL_ACCUP sy-vline 
WA_MCESLLB_STR-VAL_ACCUP2 sy-vline 
WA_MCESLLB_STR-VAL_IV sy-vline 
WA_MCESLLB_STR-MEINS sy-vline 
WA_MCESLLB_STR-MWSKZ sy-vline 
WA_MCESLLB_STR-TXJCD sy-vline      INTO ld_text SEPARATED BY SPACE.

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