ABAP Select data from SAP table MCMSEGADD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCMSEGADD
*  INTO TABLE @DATA(IT_MCMSEGADD2).
*--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_MCMSEGADD INDEX 1 INTO DATA(WA_MCMSEGADD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCMSEGADD>-MGVBR = 1.
<MCMSEGADD>-MUVBR = 1.
<MCMSEGADD>-XSTOR = 1.
<MCMSEGADD>-XLABST = 1.
<MCMSEGADD>-XINSME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCMSEGADD-XKLABS, sy-vline,
  WA_MCMSEGADD-XKINSM, sy-vline,
  WA_MCMSEGADD-XUMLME, sy-vline,
  WA_MCMSEGADD-XUMLMC, sy-vline,
  WA_MCMSEGADD-XMSQBO, sy-vline,
  WA_MCMSEGADD-XMEIKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCMSEGADD 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_MCMSEGADD 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_MCMSEGADD INTO WA_MCMSEGADD.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_MCMSEGADD_STR, 
MGVBR TYPE STRING,
MUVBR TYPE STRING,
XSTOR TYPE STRING,
XLABST TYPE STRING,
XINSME TYPE STRING,
XKLABS TYPE STRING,
XKINSM TYPE STRING,
XUMLME TYPE STRING,
XUMLMC TYPE STRING,
XMSQBO TYPE STRING,
XMEIKS TYPE STRING,
XMEIKQ TYPE STRING,
XKSPEM TYPE STRING,
XSPEME TYPE STRING,
XMKQKL TYPE STRING,
XMKQKK TYPE STRING,
XMSLBO TYPE STRING,
XMEIKL TYPE STRING,
XMKUBL TYPE STRING,
XMKLKL TYPE STRING,
XMKLKK TYPE STRING,
XRETME TYPE STRING,
XTRAME TYPE STRING,
XMSPRL TYPE STRING,
XMSPRQ TYPE STRING,
XMSPRS TYPE STRING,
XEINME TYPE STRING,
XMTVLA TYPE STRING,
XMTVQU TYPE STRING,
XMTVSP TYPE STRING,
XMTVEI TYPE STRING,
SYDAT TYPE STRING,
MZUBB TYPE STRING,
MZUKB TYPE STRING,
MAGBB TYPE STRING,
MAGKB TYPE STRING,
WZUBB TYPE STRING,
WAGBB TYPE STRING,
WGVBR TYPE STRING,
WUVBR TYPE STRING,
SUPKZ TYPE STRING,
UPDKZ TYPE STRING,
XSTBW TYPE STRING,
BVKON TYPE STRING,
BVBEW TYPE STRING,
BWERTV TYPE STRING,
WAGINV TYPE STRING,
WZUINV TYPE STRING,
BWERTVINV TYPE STRING,
WERTU TYPE STRING,
MENGU TYPE STRING,
NEUAUF_BEW TYPE STRING,
KZBEW TYPE STRING,
STGRP1 TYPE STRING,
STGRP2 TYPE STRING,
STGRP3 TYPE STRING,
STGRP4 TYPE STRING,
UMLKZ TYPE STRING,
RETKZ TYPE STRING,
INVKZ TYPE STRING,
KORR TYPE STRING,
BKLAS TYPE STRING,
XMSPRE TYPE STRING,
XMEIKE TYPE STRING,
XMKEKK TYPE STRING,
XMKEKL TYPE STRING,
XMSEBO TYPE STRING,
XKEINM TYPE STRING,
XUMBEW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCMSEGADD_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_MCMSEGADD_STR-MGVBR sy-vline 
WA_MCMSEGADD_STR-MUVBR sy-vline 
WA_MCMSEGADD_STR-XSTOR sy-vline 
WA_MCMSEGADD_STR-XLABST sy-vline 
WA_MCMSEGADD_STR-XINSME sy-vline 
WA_MCMSEGADD_STR-XKLABS sy-vline 
WA_MCMSEGADD_STR-XKINSM sy-vline 
WA_MCMSEGADD_STR-XUMLME sy-vline 
WA_MCMSEGADD_STR-XUMLMC sy-vline 
WA_MCMSEGADD_STR-XMSQBO sy-vline 
WA_MCMSEGADD_STR-XMEIKS sy-vline 
WA_MCMSEGADD_STR-XMEIKQ sy-vline 
WA_MCMSEGADD_STR-XKSPEM sy-vline 
WA_MCMSEGADD_STR-XSPEME sy-vline 
WA_MCMSEGADD_STR-XMKQKL sy-vline 
WA_MCMSEGADD_STR-XMKQKK sy-vline 
WA_MCMSEGADD_STR-XMSLBO sy-vline 
WA_MCMSEGADD_STR-XMEIKL sy-vline 
WA_MCMSEGADD_STR-XMKUBL sy-vline 
WA_MCMSEGADD_STR-XMKLKL sy-vline 
WA_MCMSEGADD_STR-XMKLKK sy-vline 
WA_MCMSEGADD_STR-XRETME sy-vline 
WA_MCMSEGADD_STR-XTRAME sy-vline 
WA_MCMSEGADD_STR-XMSPRL sy-vline 
WA_MCMSEGADD_STR-XMSPRQ sy-vline 
WA_MCMSEGADD_STR-XMSPRS sy-vline 
WA_MCMSEGADD_STR-XEINME sy-vline 
WA_MCMSEGADD_STR-XMTVLA sy-vline 
WA_MCMSEGADD_STR-XMTVQU sy-vline 
WA_MCMSEGADD_STR-XMTVSP sy-vline 
WA_MCMSEGADD_STR-XMTVEI sy-vline 
WA_MCMSEGADD_STR-SYDAT sy-vline 
WA_MCMSEGADD_STR-MZUBB sy-vline 
WA_MCMSEGADD_STR-MZUKB sy-vline 
WA_MCMSEGADD_STR-MAGBB sy-vline 
WA_MCMSEGADD_STR-MAGKB sy-vline 
WA_MCMSEGADD_STR-WZUBB sy-vline 
WA_MCMSEGADD_STR-WAGBB sy-vline 
WA_MCMSEGADD_STR-WGVBR sy-vline 
WA_MCMSEGADD_STR-WUVBR sy-vline 
WA_MCMSEGADD_STR-SUPKZ sy-vline 
WA_MCMSEGADD_STR-UPDKZ sy-vline 
WA_MCMSEGADD_STR-XSTBW sy-vline 
WA_MCMSEGADD_STR-BVKON sy-vline 
WA_MCMSEGADD_STR-BVBEW sy-vline 
WA_MCMSEGADD_STR-BWERTV sy-vline 
WA_MCMSEGADD_STR-WAGINV sy-vline 
WA_MCMSEGADD_STR-WZUINV sy-vline 
WA_MCMSEGADD_STR-BWERTVINV sy-vline 
WA_MCMSEGADD_STR-WERTU sy-vline 
WA_MCMSEGADD_STR-MENGU sy-vline 
WA_MCMSEGADD_STR-NEUAUF_BEW sy-vline 
WA_MCMSEGADD_STR-KZBEW sy-vline 
WA_MCMSEGADD_STR-STGRP1 sy-vline 
WA_MCMSEGADD_STR-STGRP2 sy-vline 
WA_MCMSEGADD_STR-STGRP3 sy-vline 
WA_MCMSEGADD_STR-STGRP4 sy-vline 
WA_MCMSEGADD_STR-UMLKZ sy-vline 
WA_MCMSEGADD_STR-RETKZ sy-vline 
WA_MCMSEGADD_STR-INVKZ sy-vline 
WA_MCMSEGADD_STR-KORR sy-vline 
WA_MCMSEGADD_STR-BKLAS sy-vline 
WA_MCMSEGADD_STR-XMSPRE sy-vline 
WA_MCMSEGADD_STR-XMEIKE sy-vline 
WA_MCMSEGADD_STR-XMKEKK sy-vline 
WA_MCMSEGADD_STR-XMKEKL sy-vline 
WA_MCMSEGADD_STR-XMSEBO sy-vline 
WA_MCMSEGADD_STR-XKEINM sy-vline 
WA_MCMSEGADD_STR-XUMBEW sy-vline      INTO ld_text SEPARATED BY SPACE.

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