ABAP Select data from SAP table MCSHIERK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCSHIERK
*  INTO TABLE @DATA(IT_MCSHIERK2).
*--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_MCSHIERK INDEX 1 INTO DATA(WA_MCSHIERK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCSHIERK>-MANDT = 1.
<MCSHIERK>-APPL = 1.
<MCSHIERK>-HNAME = 1.
<MCSHIERK>-TYPE = 1.
<MCSHIERK>-ROLNM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCSHIERK-DOMNM, sy-vline,
  WA_MCSHIERK-DATUM, sy-vline,
  WA_MCSHIERK-STANDARD, sy-vline,
  WA_MCSHIERK-LINK, sy-vline,
  WA_MCSHIERK-EINGABE, sy-vline,
  WA_MCSHIERK-SPRAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCSHIERK 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_MCSHIERK 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_MCSHIERK INTO WA_MCSHIERK.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MCSHIERK-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCSHIERK-SPRAS.
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_MCSHIERK_STR, 
MANDT TYPE STRING,
APPL TYPE STRING,
HNAME TYPE STRING,
TYPE TYPE STRING,
ROLNM TYPE STRING,
DOMNM TYPE STRING,
DATUM TYPE STRING,
STANDARD TYPE STRING,
LINK TYPE STRING,
EINGABE TYPE STRING,
SPRAS TYPE STRING,
ANNAM TYPE STRING,
ANDAT TYPE STRING,
GENAM TYPE STRING,
GEDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCSHIERK_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_MCSHIERK_STR-MANDT sy-vline 
WA_MCSHIERK_STR-APPL sy-vline 
WA_MCSHIERK_STR-HNAME sy-vline 
WA_MCSHIERK_STR-TYPE sy-vline 
WA_MCSHIERK_STR-ROLNM sy-vline 
WA_MCSHIERK_STR-DOMNM sy-vline 
WA_MCSHIERK_STR-DATUM sy-vline 
WA_MCSHIERK_STR-STANDARD sy-vline 
WA_MCSHIERK_STR-LINK sy-vline 
WA_MCSHIERK_STR-EINGABE sy-vline 
WA_MCSHIERK_STR-SPRAS sy-vline 
WA_MCSHIERK_STR-ANNAM sy-vline 
WA_MCSHIERK_STR-ANDAT sy-vline 
WA_MCSHIERK_STR-GENAM sy-vline 
WA_MCSHIERK_STR-GEDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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