ABAP Select data from SAP table MT08L into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MT08L 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 MT08L. 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 MT08L 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_MT08L TYPE STANDARD TABLE OF MT08L,
      WA_MT08L TYPE MT08L,
      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: <MT08L> TYPE MT08L.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MT08L.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MT08L
  INTO TABLE IT_MT08L.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MT08L
*  INTO TABLE @DATA(IT_MT08L2).
*--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_MT08L INDEX 1 INTO DATA(WA_MT08L2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MT08L ASSIGNING <MT08L>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MT08L>-MAKTX = 1.
<MT08L>-MEINS = 1.
<MT08L>-STDPR = 1.
<MT08L>-KMBEW = 1.
<MT08L>-BWTTY = 1.

ENDLOOP.

LOOP AT IT_MT08L INTO WA_MT08L.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MT08L-LBKUM, sy-vline,
  WA_MT08L-SALK3, sy-vline,
  WA_MT08L-SALKV, sy-vline,
  WA_MT08L-VPRSV, sy-vline,
  WA_MT08L-VERPR, sy-vline,
  WA_MT08L-STPRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MT08L 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_MT08L 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_MT08L INTO WA_MT08L.


*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 CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MT08L-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MT08L-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field STDPR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MT08L-STDPR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MT08L-STDPR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field LFGJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MT08L-LFGJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MT08L-LFGJA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field PDATZ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MT08L-PDATZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MT08L-PDATZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field PDATL
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MT08L-PDATL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MT08L-PDATL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field PDATV
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MT08L-PDATV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MT08L-PDATV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field /CWM/VALUM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MT08L-/CWM/VALUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MT08L-/CWM/VALUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field /CWM/BASME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MT08L-/CWM/BASME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MT08L-/CWM/BASME.
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_MT08L_STR, 
MAKTX TYPE STRING,
MEINS TYPE STRING,
STDPR TYPE STRING,
KMBEW TYPE STRING,
BWTTY TYPE STRING,
LBKUM TYPE STRING,
SALK3 TYPE STRING,
SALKV TYPE STRING,
VPRSV TYPE STRING,
VERPR TYPE STRING,
STPRS TYPE STRING,
PEINH TYPE STRING,
BKLAS TYPE STRING,
EKLAS TYPE STRING,
QKLAS TYPE STRING,
VMKUM TYPE STRING,
VMSAL TYPE STRING,
VMSAV TYPE STRING,
VMVPR TYPE STRING,
VMVER TYPE STRING,
VMSTP TYPE STRING,
VMPEI TYPE STRING,
VMBKL TYPE STRING,
VJKUM TYPE STRING,
VJSAL TYPE STRING,
VJSAV TYPE STRING,
VJVPR TYPE STRING,
VJVER TYPE STRING,
VJSTP TYPE STRING,
VJPEI TYPE STRING,
VJBKL TYPE STRING,
LFGJA TYPE STRING,
LFMON TYPE STRING,
XLIFO TYPE STRING,
GSBER TYPE STRING,
MLMAA TYPE STRING,
MLAST TYPE STRING,
KALN1 TYPE STRING,
ZKPRS TYPE STRING,
ZKDAT TYPE STRING,
SPART TYPE STRING,
WERTU TYPE STRING,
MENGU TYPE STRING,
VKSAL TYPE STRING,
MTART TYPE STRING,
MBRUE TYPE STRING,
KALKZ TYPE STRING,
PPRDZ TYPE STRING,
PDATZ TYPE STRING,
BWVA1 TYPE STRING,
VERS1 TYPE STRING,
ZPLPR TYPE STRING,
FPLPX TYPE STRING,
ZBWST TYPE STRING,
KALKL TYPE STRING,
PPRDL TYPE STRING,
PDATL TYPE STRING,
BWVA2 TYPE STRING,
VERS2 TYPE STRING,
LPLPR TYPE STRING,
LPLPX TYPE STRING,
LBWST TYPE STRING,
KALKV TYPE STRING,
PPRDV TYPE STRING,
PDATV TYPE STRING,
BWVA3 TYPE STRING,
VERS3 TYPE STRING,
VPLPR TYPE STRING,
VPLPX TYPE STRING,
CBWST TYPE STRING,
SET_BY_MARKING TYPE STRING,
HRKFT TYPE STRING,
VMVKS TYPE STRING,
VJVKS TYPE STRING,
/CWM/XCWMAT TYPE STRING,
/CWM/VALUM TYPE STRING,
/CWM/BASME TYPE STRING,
ATTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MT08L_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_MT08L_STR-MAKTX sy-vline 
WA_MT08L_STR-MEINS sy-vline 
WA_MT08L_STR-STDPR sy-vline 
WA_MT08L_STR-KMBEW sy-vline 
WA_MT08L_STR-BWTTY sy-vline 
WA_MT08L_STR-LBKUM sy-vline 
WA_MT08L_STR-SALK3 sy-vline 
WA_MT08L_STR-SALKV sy-vline 
WA_MT08L_STR-VPRSV sy-vline 
WA_MT08L_STR-VERPR sy-vline 
WA_MT08L_STR-STPRS sy-vline 
WA_MT08L_STR-PEINH sy-vline 
WA_MT08L_STR-BKLAS sy-vline 
WA_MT08L_STR-EKLAS sy-vline 
WA_MT08L_STR-QKLAS sy-vline 
WA_MT08L_STR-VMKUM sy-vline 
WA_MT08L_STR-VMSAL sy-vline 
WA_MT08L_STR-VMSAV sy-vline 
WA_MT08L_STR-VMVPR sy-vline 
WA_MT08L_STR-VMVER sy-vline 
WA_MT08L_STR-VMSTP sy-vline 
WA_MT08L_STR-VMPEI sy-vline 
WA_MT08L_STR-VMBKL sy-vline 
WA_MT08L_STR-VJKUM sy-vline 
WA_MT08L_STR-VJSAL sy-vline 
WA_MT08L_STR-VJSAV sy-vline 
WA_MT08L_STR-VJVPR sy-vline 
WA_MT08L_STR-VJVER sy-vline 
WA_MT08L_STR-VJSTP sy-vline 
WA_MT08L_STR-VJPEI sy-vline 
WA_MT08L_STR-VJBKL sy-vline 
WA_MT08L_STR-LFGJA sy-vline 
WA_MT08L_STR-LFMON sy-vline 
WA_MT08L_STR-XLIFO sy-vline 
WA_MT08L_STR-GSBER sy-vline 
WA_MT08L_STR-MLMAA sy-vline 
WA_MT08L_STR-MLAST sy-vline 
WA_MT08L_STR-KALN1 sy-vline 
WA_MT08L_STR-ZKPRS sy-vline 
WA_MT08L_STR-ZKDAT sy-vline 
WA_MT08L_STR-SPART sy-vline 
WA_MT08L_STR-WERTU sy-vline 
WA_MT08L_STR-MENGU sy-vline 
WA_MT08L_STR-VKSAL sy-vline 
WA_MT08L_STR-MTART sy-vline 
WA_MT08L_STR-MBRUE sy-vline 
WA_MT08L_STR-KALKZ sy-vline 
WA_MT08L_STR-PPRDZ sy-vline 
WA_MT08L_STR-PDATZ sy-vline 
WA_MT08L_STR-BWVA1 sy-vline 
WA_MT08L_STR-VERS1 sy-vline 
WA_MT08L_STR-ZPLPR sy-vline 
WA_MT08L_STR-FPLPX sy-vline 
WA_MT08L_STR-ZBWST sy-vline 
WA_MT08L_STR-KALKL sy-vline 
WA_MT08L_STR-PPRDL sy-vline 
WA_MT08L_STR-PDATL sy-vline 
WA_MT08L_STR-BWVA2 sy-vline 
WA_MT08L_STR-VERS2 sy-vline 
WA_MT08L_STR-LPLPR sy-vline 
WA_MT08L_STR-LPLPX sy-vline 
WA_MT08L_STR-LBWST sy-vline 
WA_MT08L_STR-KALKV sy-vline 
WA_MT08L_STR-PPRDV sy-vline 
WA_MT08L_STR-PDATV sy-vline 
WA_MT08L_STR-BWVA3 sy-vline 
WA_MT08L_STR-VERS3 sy-vline 
WA_MT08L_STR-VPLPR sy-vline 
WA_MT08L_STR-VPLPX sy-vline 
WA_MT08L_STR-CBWST sy-vline 
WA_MT08L_STR-SET_BY_MARKING sy-vline 
WA_MT08L_STR-HRKFT sy-vline 
WA_MT08L_STR-VMVKS sy-vline 
WA_MT08L_STR-VJVKS sy-vline 
WA_MT08L_STR-/CWM/XCWMAT sy-vline 
WA_MT08L_STR-/CWM/VALUM sy-vline 
WA_MT08L_STR-/CWM/BASME sy-vline 
WA_MT08L_STR-ATTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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