ABAP Select data from SAP table SHSTRUC into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SHSTRUC
*  INTO TABLE @DATA(IT_SHSTRUC2).
*--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_SHSTRUC INDEX 1 INTO DATA(WA_SHSTRUC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SHSTRUC>-POS = 1.
<SHSTRUC>-TABNAME = 1.
<SHSTRUC>-FIELDNAME = 1.
<SHSTRUC>-FIELDTYPE = 1.
<SHSTRUC>-FIELDTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SHSTRUC-FIELDLEN, sy-vline,
  WA_SHSTRUC-KEYWORD, sy-vline,
  WA_SHSTRUC-KEYWORDLEN, sy-vline,
  WA_SHSTRUC-KEYFLAG, sy-vline,
  WA_SHSTRUC-SELECTFLAG, sy-vline,
  WA_SHSTRUC-SCRLEN_S, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SHSTRUC 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_SHSTRUC 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_SHSTRUC INTO WA_SHSTRUC.


*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 DTYPE, internal->external for field FIELDTYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_SHSTRUC-FIELDTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SHSTRUC-FIELDTYPE.
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_SHSTRUC_STR, 
POS TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
FIELDTYPE TYPE STRING,
FIELDTEXT TYPE STRING,
FIELDLEN TYPE STRING,
KEYWORD TYPE STRING,
KEYWORDLEN TYPE STRING,
KEYFLAG TYPE STRING,
SELECTFLAG TYPE STRING,
SCRLEN_S TYPE STRING,
SCRLEN_M TYPE STRING,
SCRLEN_L TYPE STRING,
SCRTEXT_S TYPE STRING,
SCRTEXT_M TYPE STRING,
SCRTEXT_L TYPE STRING,
DISPLAY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SHSTRUC_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_SHSTRUC_STR-POS sy-vline 
WA_SHSTRUC_STR-TABNAME sy-vline 
WA_SHSTRUC_STR-FIELDNAME sy-vline 
WA_SHSTRUC_STR-FIELDTYPE sy-vline 
WA_SHSTRUC_STR-FIELDTEXT sy-vline 
WA_SHSTRUC_STR-FIELDLEN sy-vline 
WA_SHSTRUC_STR-KEYWORD sy-vline 
WA_SHSTRUC_STR-KEYWORDLEN sy-vline 
WA_SHSTRUC_STR-KEYFLAG sy-vline 
WA_SHSTRUC_STR-SELECTFLAG sy-vline 
WA_SHSTRUC_STR-SCRLEN_S sy-vline 
WA_SHSTRUC_STR-SCRLEN_M sy-vline 
WA_SHSTRUC_STR-SCRLEN_L sy-vline 
WA_SHSTRUC_STR-SCRTEXT_S sy-vline 
WA_SHSTRUC_STR-SCRTEXT_M sy-vline 
WA_SHSTRUC_STR-SCRTEXT_L sy-vline 
WA_SHSTRUC_STR-DISPLAY sy-vline      INTO ld_text SEPARATED BY SPACE.

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