ABAP Select data from SAP table MARCW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MARCW
*  INTO TABLE @DATA(IT_MARCW2).
*--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_MARCW INDEX 1 INTO DATA(WA_MARCW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MARCW>-MANDT = 1.
<MARCW>-MATNR = 1.
<MARCW>-WERKS = 1.
<MARCW>-BWKEY = 1.
<MARCW>-BWTAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MARCW-PSTAT, sy-vline,
  WA_MARCW-LVORM, sy-vline,
  WA_MARCW-XCHAR, sy-vline,
  WA_MARCW-MMSTA, sy-vline,
  WA_MARCW-MMSTD, sy-vline,
  WA_MARCW-MAABC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MARCW 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_MARCW 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_MARCW INTO WA_MARCW.


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

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

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

*Conversion exit CUNIT, internal->external for field LZEIH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MARCW-LZEIH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MARCW-LZEIH.
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_MARCW_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
PSTAT TYPE STRING,
LVORM TYPE STRING,
XCHAR TYPE STRING,
MMSTA TYPE STRING,
MMSTD TYPE STRING,
MAABC TYPE STRING,
KZKRI TYPE STRING,
EKGRP TYPE STRING,
AUSME TYPE STRING,
DISPR TYPE STRING,
DISMM TYPE STRING,
DISPO TYPE STRING,
KZDIE TYPE STRING,
PLIFZ TYPE STRING,
WEBAZ TYPE STRING,
PERKZ TYPE STRING,
AUSSS TYPE STRING,
DISLS TYPE STRING,
BESKZ TYPE STRING,
SOBSL TYPE STRING,
MINBE TYPE STRING,
EISBE TYPE STRING,
BSTMI TYPE STRING,
BSTMA TYPE STRING,
BSTFE TYPE STRING,
BSTRF TYPE STRING,
MABST TYPE STRING,
LOSFX TYPE STRING,
SBDKZ TYPE STRING,
LAGPR TYPE STRING,
ALTSL TYPE STRING,
KZAUS TYPE STRING,
AUSDT TYPE STRING,
NFMAT TYPE STRING,
KZBED TYPE STRING,
MISKZ TYPE STRING,
FHORI TYPE STRING,
PFREI TYPE STRING,
FFREI TYPE STRING,
RGEKZ TYPE STRING,
FEVOR TYPE STRING,
BEARZ TYPE STRING,
RUEZT TYPE STRING,
TRANZ TYPE STRING,
BASMG TYPE STRING,
DZEIT TYPE STRING,
MAXLZ TYPE STRING,
LZEIH TYPE STRING,
KZPRO TYPE STRING,
GPMKZ TYPE STRING,
UEETO TYPE STRING,
UEETK TYPE STRING,
UNETO TYPE STRING,
WZEIT TYPE STRING,
ATPKZ TYPE STRING,
VZUSL TYPE STRING,
HERBL TYPE STRING,
INSMK TYPE STRING,
SPROZ TYPE STRING,
QUAZT TYPE STRING,
SSQSS TYPE STRING,
MPDAU TYPE STRING,
KZPPV TYPE STRING,
KZDKZ TYPE STRING,
WSTGH TYPE STRING,
PRFRQ TYPE STRING,
NKMPR TYPE STRING,
UMLMC TYPE STRING,
LADGR TYPE STRING,
XCHPF TYPE STRING,
USEQU TYPE STRING,
LGRAD TYPE STRING,
AUFTL TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
MTVFP TYPE STRING,
PERIV TYPE STRING,
KZKFK TYPE STRING,
VRVEZ TYPE STRING,
VBAMG TYPE STRING,
VBEAZ TYPE STRING,
LBKUM TYPE STRING,
SALK3 TYPE STRING,
VPRSV TYPE STRING,
VERPR TYPE STRING,
STPRS TYPE STRING,
PEINH TYPE STRING,
BKLAS TYPE STRING,
SALKV TYPE STRING,
BWTTY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MARCW_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_MARCW_STR-MANDT sy-vline 
WA_MARCW_STR-MATNR sy-vline 
WA_MARCW_STR-WERKS sy-vline 
WA_MARCW_STR-BWKEY sy-vline 
WA_MARCW_STR-BWTAR sy-vline 
WA_MARCW_STR-PSTAT sy-vline 
WA_MARCW_STR-LVORM sy-vline 
WA_MARCW_STR-XCHAR sy-vline 
WA_MARCW_STR-MMSTA sy-vline 
WA_MARCW_STR-MMSTD sy-vline 
WA_MARCW_STR-MAABC sy-vline 
WA_MARCW_STR-KZKRI sy-vline 
WA_MARCW_STR-EKGRP sy-vline 
WA_MARCW_STR-AUSME sy-vline 
WA_MARCW_STR-DISPR sy-vline 
WA_MARCW_STR-DISMM sy-vline 
WA_MARCW_STR-DISPO sy-vline 
WA_MARCW_STR-KZDIE sy-vline 
WA_MARCW_STR-PLIFZ sy-vline 
WA_MARCW_STR-WEBAZ sy-vline 
WA_MARCW_STR-PERKZ sy-vline 
WA_MARCW_STR-AUSSS sy-vline 
WA_MARCW_STR-DISLS sy-vline 
WA_MARCW_STR-BESKZ sy-vline 
WA_MARCW_STR-SOBSL sy-vline 
WA_MARCW_STR-MINBE sy-vline 
WA_MARCW_STR-EISBE sy-vline 
WA_MARCW_STR-BSTMI sy-vline 
WA_MARCW_STR-BSTMA sy-vline 
WA_MARCW_STR-BSTFE sy-vline 
WA_MARCW_STR-BSTRF sy-vline 
WA_MARCW_STR-MABST sy-vline 
WA_MARCW_STR-LOSFX sy-vline 
WA_MARCW_STR-SBDKZ sy-vline 
WA_MARCW_STR-LAGPR sy-vline 
WA_MARCW_STR-ALTSL sy-vline 
WA_MARCW_STR-KZAUS sy-vline 
WA_MARCW_STR-AUSDT sy-vline 
WA_MARCW_STR-NFMAT sy-vline 
WA_MARCW_STR-KZBED sy-vline 
WA_MARCW_STR-MISKZ sy-vline 
WA_MARCW_STR-FHORI sy-vline 
WA_MARCW_STR-PFREI sy-vline 
WA_MARCW_STR-FFREI sy-vline 
WA_MARCW_STR-RGEKZ sy-vline 
WA_MARCW_STR-FEVOR sy-vline 
WA_MARCW_STR-BEARZ sy-vline 
WA_MARCW_STR-RUEZT sy-vline 
WA_MARCW_STR-TRANZ sy-vline 
WA_MARCW_STR-BASMG sy-vline 
WA_MARCW_STR-DZEIT sy-vline 
WA_MARCW_STR-MAXLZ sy-vline 
WA_MARCW_STR-LZEIH sy-vline 
WA_MARCW_STR-KZPRO sy-vline 
WA_MARCW_STR-GPMKZ sy-vline 
WA_MARCW_STR-UEETO sy-vline 
WA_MARCW_STR-UEETK sy-vline 
WA_MARCW_STR-UNETO sy-vline 
WA_MARCW_STR-WZEIT sy-vline 
WA_MARCW_STR-ATPKZ sy-vline 
WA_MARCW_STR-VZUSL sy-vline 
WA_MARCW_STR-HERBL sy-vline 
WA_MARCW_STR-INSMK sy-vline 
WA_MARCW_STR-SPROZ sy-vline 
WA_MARCW_STR-QUAZT sy-vline 
WA_MARCW_STR-SSQSS sy-vline 
WA_MARCW_STR-MPDAU sy-vline 
WA_MARCW_STR-KZPPV sy-vline 
WA_MARCW_STR-KZDKZ sy-vline 
WA_MARCW_STR-WSTGH sy-vline 
WA_MARCW_STR-PRFRQ sy-vline 
WA_MARCW_STR-NKMPR sy-vline 
WA_MARCW_STR-UMLMC sy-vline 
WA_MARCW_STR-LADGR sy-vline 
WA_MARCW_STR-XCHPF sy-vline 
WA_MARCW_STR-USEQU sy-vline 
WA_MARCW_STR-LGRAD sy-vline 
WA_MARCW_STR-AUFTL sy-vline 
WA_MARCW_STR-PLVAR sy-vline 
WA_MARCW_STR-OTYPE sy-vline 
WA_MARCW_STR-OBJID sy-vline 
WA_MARCW_STR-MTVFP sy-vline 
WA_MARCW_STR-PERIV sy-vline 
WA_MARCW_STR-KZKFK sy-vline 
WA_MARCW_STR-VRVEZ sy-vline 
WA_MARCW_STR-VBAMG sy-vline 
WA_MARCW_STR-VBEAZ sy-vline 
WA_MARCW_STR-LBKUM sy-vline 
WA_MARCW_STR-SALK3 sy-vline 
WA_MARCW_STR-VPRSV sy-vline 
WA_MARCW_STR-VERPR sy-vline 
WA_MARCW_STR-STPRS sy-vline 
WA_MARCW_STR-PEINH sy-vline 
WA_MARCW_STR-BKLAS sy-vline 
WA_MARCW_STR-SALKV sy-vline 
WA_MARCW_STR-BWTTY sy-vline      INTO ld_text SEPARATED BY SPACE.

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