ABAP Select data from SAP table SHSMMMWAKD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SHSMMMWAKD
*  INTO TABLE @DATA(IT_SHSMMMWAKD2).
*--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_SHSMMMWAKD INDEX 1 INTO DATA(WA_SHSMMMWAKD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SHSMMMWAKD>-MANDT = 1.
<SHSMMMWAKD>-ABELN = 1.
<SHSMMMWAKD>-ABELP = 1.
<SHSMMMWAKD>-EKORB = 1.
<SHSMMMWAKD>-FIGRP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SHSMMMWAKD-FILNR, sy-vline,
  WA_SHSMMMWAKD-LFNRU, sy-vline,
  WA_SHSMMMWAKD-VZENT, sy-vline,
  WA_SHSMMMWAKD-ABELG, sy-vline,
  WA_SHSMMMWAKD-ABELF, sy-vline,
  WA_SHSMMMWAKD-EKGRB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SHSMMMWAKD 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_SHSMMMWAKD 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_SHSMMMWAKD INTO WA_SHSMMMWAKD.


*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 ALPHA, internal->external for field ABELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SHSMMMWAKD-ABELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SHSMMMWAKD-ABELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FILNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SHSMMMWAKD-FILNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SHSMMMWAKD-FILNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LFNRU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SHSMMMWAKD-LFNRU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SHSMMMWAKD-LFNRU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VZENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SHSMMMWAKD-VZENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SHSMMMWAKD-VZENT.
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_SHSMMMWAKD_STR, 
MANDT TYPE STRING,
ABELN TYPE STRING,
ABELP TYPE STRING,
EKORB TYPE STRING,
FIGRP TYPE STRING,
FILNR TYPE STRING,
LFNRU TYPE STRING,
VZENT TYPE STRING,
ABELG TYPE STRING,
ABELF TYPE STRING,
EKGRB TYPE STRING,
AUFAR TYPE STRING,
ISBUSINESSPURPOSECOMPLETED TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SHSMMMWAKD_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_SHSMMMWAKD_STR-MANDT sy-vline 
WA_SHSMMMWAKD_STR-ABELN sy-vline 
WA_SHSMMMWAKD_STR-ABELP sy-vline 
WA_SHSMMMWAKD_STR-EKORB sy-vline 
WA_SHSMMMWAKD_STR-FIGRP sy-vline 
WA_SHSMMMWAKD_STR-FILNR sy-vline 
WA_SHSMMMWAKD_STR-LFNRU sy-vline 
WA_SHSMMMWAKD_STR-VZENT sy-vline 
WA_SHSMMMWAKD_STR-ABELG sy-vline 
WA_SHSMMMWAKD_STR-ABELF sy-vline 
WA_SHSMMMWAKD_STR-EKGRB sy-vline 
WA_SHSMMMWAKD_STR-AUFAR sy-vline 
WA_SHSMMMWAKD_STR-ISBUSINESSPURPOSECOMPLETED sy-vline 
WA_SHSMMMWAKD_STR-AUTHORIZATIONGROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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