ABAP Select data from SAP table MLCO 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 MLCO 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 MLCO. 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 MLCO 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_MLCO TYPE STANDARD TABLE OF MLCO,
      WA_MLCO TYPE MLCO,
      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: <MLCO> TYPE MLCO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MLCO
*  INTO TABLE @DATA(IT_MLCO2).
*--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_MLCO INDEX 1 INTO DATA(WA_MLCO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MLCO>-MANDT = 1.
<MLCO>-BELNR = 1.
<MLCO>-KJAHR = 1.
<MLCO>-MLCONR = 1.
<MLCO>-GJAHR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MLCO-KOKRS, sy-vline,
  WA_MLCO-SAKTO, sy-vline,
  WA_MLCO-GEBER, sy-vline,
  WA_MLCO-FISTL, sy-vline,
  WA_MLCO-FIPOS, sy-vline,
  WA_MLCO-FKBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MLCO 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_MLCO 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_MLCO INTO WA_MLCO.


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

*Conversion exit GJAHR, internal->external for field KJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MLCO-KJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MLCO-KJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MLCO-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MLCO-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit FMCIS, internal->external for field FIPOS
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_MLCO-FIPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MLCO-FIPOS.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_MLCO-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MLCO-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MLCO-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MLCO-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MLCO-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MLCO-ANLN2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRZNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MLCO-PRZNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MLCO-PRZNR.
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_MLCO_STR, 
MANDT TYPE STRING,
BELNR TYPE STRING,
KJAHR TYPE STRING,
MLCONR TYPE STRING,
GJAHR TYPE STRING,
KOKRS TYPE STRING,
SAKTO TYPE STRING,
GEBER TYPE STRING,
FISTL TYPE STRING,
FIPOS TYPE STRING,
FKBER TYPE STRING,
PAOBJNR TYPE STRING,
PRCTR TYPE STRING,
PPRCTR TYPE STRING,
PARGB TYPE STRING,
PARBU TYPE STRING,
XSKST TYPE STRING,
KOSTL TYPE STRING,
XSAUF TYPE STRING,
AUFNR TYPE STRING,
XSPRO TYPE STRING,
PS_PSP_PNR TYPE STRING,
NPLNR TYPE STRING,
XSERG TYPE STRING,
LIFNR TYPE STRING,
EBELN TYPE STRING,
KUNNR TYPE STRING,
KDAUF TYPE STRING,
KSTRG TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
PRZNR TYPE STRING,
LSTAR TYPE STRING,
DUMMY_INCL_EEW_COBL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MLCO_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_MLCO_STR-MANDT sy-vline 
WA_MLCO_STR-BELNR sy-vline 
WA_MLCO_STR-KJAHR sy-vline 
WA_MLCO_STR-MLCONR sy-vline 
WA_MLCO_STR-GJAHR sy-vline 
WA_MLCO_STR-KOKRS sy-vline 
WA_MLCO_STR-SAKTO sy-vline 
WA_MLCO_STR-GEBER sy-vline 
WA_MLCO_STR-FISTL sy-vline 
WA_MLCO_STR-FIPOS sy-vline 
WA_MLCO_STR-FKBER sy-vline 
WA_MLCO_STR-PAOBJNR sy-vline 
WA_MLCO_STR-PRCTR sy-vline 
WA_MLCO_STR-PPRCTR sy-vline 
WA_MLCO_STR-PARGB sy-vline 
WA_MLCO_STR-PARBU sy-vline 
WA_MLCO_STR-XSKST sy-vline 
WA_MLCO_STR-KOSTL sy-vline 
WA_MLCO_STR-XSAUF sy-vline 
WA_MLCO_STR-AUFNR sy-vline 
WA_MLCO_STR-XSPRO sy-vline 
WA_MLCO_STR-PS_PSP_PNR sy-vline 
WA_MLCO_STR-NPLNR sy-vline 
WA_MLCO_STR-XSERG sy-vline 
WA_MLCO_STR-LIFNR sy-vline 
WA_MLCO_STR-EBELN sy-vline 
WA_MLCO_STR-KUNNR sy-vline 
WA_MLCO_STR-KDAUF sy-vline 
WA_MLCO_STR-KSTRG sy-vline 
WA_MLCO_STR-ANLN1 sy-vline 
WA_MLCO_STR-ANLN2 sy-vline 
WA_MLCO_STR-PRZNR sy-vline 
WA_MLCO_STR-LSTAR sy-vline 
WA_MLCO_STR-DUMMY_INCL_EEW_COBL sy-vline      INTO ld_text SEPARATED BY SPACE.

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