ABAP Select data from SAP table /SAPAPO/MARM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/MARM 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 /SAPAPO/MARM. 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 /SAPAPO/MARM 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_/SAPAPO/MARM TYPE STANDARD TABLE OF /SAPAPO/MARM,
      WA_/SAPAPO/MARM TYPE /SAPAPO/MARM,
      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: </SAPAPO/MARM> TYPE /SAPAPO/MARM.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/MARM
  INTO TABLE IT_/SAPAPO/MARM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/MARM
*  INTO TABLE @DATA(IT_/SAPAPO/MARM2).
*--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_/SAPAPO/MARM INDEX 1 INTO DATA(WA_/SAPAPO/MARM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/MARM ASSIGNING </SAPAPO/MARM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/MARM>-MANDT = 1.
</SAPAPO/MARM>-MATID = 1.
</SAPAPO/MARM>-MEINH = 1.
</SAPAPO/MARM>-TY2TQ = 1.
</SAPAPO/MARM>-UMREZ = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/MARM INTO WA_/SAPAPO/MARM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/MARM-UMREN, sy-vline,
  WA_/SAPAPO/MARM-EAN11, sy-vline,
  WA_/SAPAPO/MARM-EANCAT, sy-vline,
  WA_/SAPAPO/MARM-GTIN_VARIANT, sy-vline,
  WA_/SAPAPO/MARM-BRGEW, sy-vline,
  WA_/SAPAPO/MARM-NTGEW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/MARM 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_/SAPAPO/MARM 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_/SAPAPO/MARM INTO WA_/SAPAPO/MARM.


*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 MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MARM-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MARM-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EAN11, internal->external for field EAN11
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MARM-EAN11
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MARM-EAN11.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit CUNIT, internal->external for field TOP_LOAD_FULL_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MARM-TOP_LOAD_FULL_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MARM-TOP_LOAD_FULL_UOM.
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_/SAPAPO/MARM_STR, 
MANDT TYPE STRING,
MATID TYPE STRING,
MEINH TYPE STRING,
TY2TQ TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
EAN11 TYPE STRING,
EANCAT TYPE STRING,
GTIN_VARIANT TYPE STRING,
BRGEW TYPE STRING,
NTGEW TYPE STRING,
GEWEI TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
LAENG TYPE STRING,
BREIT TYPE STRING,
HOEHE TYPE STRING,
MEABM TYPE STRING,
MAXSTACK TYPE STRING,
NEST_FTR TYPE STRING,
CAPAUSE TYPE STRING,
TOP_LOAD_FULL TYPE STRING,
TOP_LOAD_FULL_UOM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/MARM_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_/SAPAPO/MARM_STR-MANDT sy-vline 
WA_/SAPAPO/MARM_STR-MATID sy-vline 
WA_/SAPAPO/MARM_STR-MEINH sy-vline 
WA_/SAPAPO/MARM_STR-TY2TQ sy-vline 
WA_/SAPAPO/MARM_STR-UMREZ sy-vline 
WA_/SAPAPO/MARM_STR-UMREN sy-vline 
WA_/SAPAPO/MARM_STR-EAN11 sy-vline 
WA_/SAPAPO/MARM_STR-EANCAT sy-vline 
WA_/SAPAPO/MARM_STR-GTIN_VARIANT sy-vline 
WA_/SAPAPO/MARM_STR-BRGEW sy-vline 
WA_/SAPAPO/MARM_STR-NTGEW sy-vline 
WA_/SAPAPO/MARM_STR-GEWEI sy-vline 
WA_/SAPAPO/MARM_STR-VOLUM sy-vline 
WA_/SAPAPO/MARM_STR-VOLEH sy-vline 
WA_/SAPAPO/MARM_STR-LAENG sy-vline 
WA_/SAPAPO/MARM_STR-BREIT sy-vline 
WA_/SAPAPO/MARM_STR-HOEHE sy-vline 
WA_/SAPAPO/MARM_STR-MEABM sy-vline 
WA_/SAPAPO/MARM_STR-MAXSTACK sy-vline 
WA_/SAPAPO/MARM_STR-NEST_FTR sy-vline 
WA_/SAPAPO/MARM_STR-CAPAUSE sy-vline 
WA_/SAPAPO/MARM_STR-TOP_LOAD_FULL sy-vline 
WA_/SAPAPO/MARM_STR-TOP_LOAD_FULL_UOM sy-vline      INTO ld_text SEPARATED BY SPACE.

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