ABAP Select data from SAP table MDDMAP 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 MDDMAP 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 MDDMAP. 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 MDDMAP 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_MDDMAP TYPE STANDARD TABLE OF MDDMAP,
      WA_MDDMAP TYPE MDDMAP,
      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: <MDDMAP> TYPE MDDMAP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDDMAP
*  INTO TABLE @DATA(IT_MDDMAP2).
*--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_MDDMAP INDEX 1 INTO DATA(WA_MDDMAP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDDMAP>-MANDT = 1.
<MDDMAP>-UNAME = 1.
<MDDMAP>-VIEWN = 1.
<MDDMAP>-PLSCN = 1.
<MDDMAP>-DISPO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDDMAP-FILBZ, sy-vline,
  WA_MDDMAP-WERKS, sy-vline,
  WA_MDDMAP-BERID, sy-vline,
  WA_MDDMAP-PRGRP, sy-vline,
  WA_MDDMAP-LIFNR, sy-vline,
  WA_MDDMAP-BANKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDDMAP 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_MDDMAP 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_MDDMAP INTO WA_MDDMAP.


*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 PRGRP
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MDDMAP-PRGRP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDDMAP-PRGRP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MDDMAP-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDDMAP-LIFNR.
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_MDDMAP_STR, 
MANDT TYPE STRING,
UNAME TYPE STRING,
VIEWN TYPE STRING,
PLSCN TYPE STRING,
DISPO TYPE STRING,
FILBZ TYPE STRING,
WERKS TYPE STRING,
BERID TYPE STRING,
PRGRP TYPE STRING,
LIFNR TYPE STRING,
BANKZ TYPE STRING,
BSTKZ TYPE STRING,
PAUKZ TYPE STRING,
DTLFV TYPE STRING,
DTLFB TYPE STRING,
DSP01 TYPE STRING,
DTDFV TYPE STRING,
DTDFB TYPE STRING,
DTDBV TYPE STRING,
DTDBB TYPE STRING,
BERW1 TYPE STRING,
BERW2 TYPE STRING,
BERW4 TYPE STRING,
MAABC TYPE STRING,
DISMM TYPE STRING,
BESKZ TYPE STRING,
SOBSL TYPE STRING,
SELKZ1 TYPE STRING,
SELKZ2 TYPE STRING,
SELKZ3 TYPE STRING,
SELKZ4 TYPE STRING,
SELKZ5 TYPE STRING,
SELKZ6 TYPE STRING,
SELKZ7 TYPE STRING,
SELKZ8 TYPE STRING,
JBEKZ TYPE STRING,
NBEKZ TYPE STRING,
NAUKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDDMAP_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_MDDMAP_STR-MANDT sy-vline 
WA_MDDMAP_STR-UNAME sy-vline 
WA_MDDMAP_STR-VIEWN sy-vline 
WA_MDDMAP_STR-PLSCN sy-vline 
WA_MDDMAP_STR-DISPO sy-vline 
WA_MDDMAP_STR-FILBZ sy-vline 
WA_MDDMAP_STR-WERKS sy-vline 
WA_MDDMAP_STR-BERID sy-vline 
WA_MDDMAP_STR-PRGRP sy-vline 
WA_MDDMAP_STR-LIFNR sy-vline 
WA_MDDMAP_STR-BANKZ sy-vline 
WA_MDDMAP_STR-BSTKZ sy-vline 
WA_MDDMAP_STR-PAUKZ sy-vline 
WA_MDDMAP_STR-DTLFV sy-vline 
WA_MDDMAP_STR-DTLFB sy-vline 
WA_MDDMAP_STR-DSP01 sy-vline 
WA_MDDMAP_STR-DTDFV sy-vline 
WA_MDDMAP_STR-DTDFB sy-vline 
WA_MDDMAP_STR-DTDBV sy-vline 
WA_MDDMAP_STR-DTDBB sy-vline 
WA_MDDMAP_STR-BERW1 sy-vline 
WA_MDDMAP_STR-BERW2 sy-vline 
WA_MDDMAP_STR-BERW4 sy-vline 
WA_MDDMAP_STR-MAABC sy-vline 
WA_MDDMAP_STR-DISMM sy-vline 
WA_MDDMAP_STR-BESKZ sy-vline 
WA_MDDMAP_STR-SOBSL sy-vline 
WA_MDDMAP_STR-SELKZ1 sy-vline 
WA_MDDMAP_STR-SELKZ2 sy-vline 
WA_MDDMAP_STR-SELKZ3 sy-vline 
WA_MDDMAP_STR-SELKZ4 sy-vline 
WA_MDDMAP_STR-SELKZ5 sy-vline 
WA_MDDMAP_STR-SELKZ6 sy-vline 
WA_MDDMAP_STR-SELKZ7 sy-vline 
WA_MDDMAP_STR-SELKZ8 sy-vline 
WA_MDDMAP_STR-JBEKZ sy-vline 
WA_MDDMAP_STR-NBEKZ sy-vline 
WA_MDDMAP_STR-NAUKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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