ABAP Select data from SAP table USMD_SX_CLASS_ATTRIBUTES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM USMD_SX_CLASS_ATTRIBUTES
*  INTO TABLE @DATA(IT_USMD_SX_CLASS_ATTRIBUTES2).
*--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_USMD_SX_CLASS_ATTRIBUTES INDEX 1 INTO DATA(WA_USMD_SX_CLASS_ATTRIBUTES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<USMD_SX_CLASS_ATTRIBUTES>-EDITION_TO = 1.
<USMD_SX_CLASS_ATTRIBUTES>-EDITION_FROM = 1.
<USMD_SX_CLASS_ATTRIBUTES>-EDITION_CREQ = 1.
<USMD_SX_CLASS_ATTRIBUTES>-CREQUEST = 1.
<USMD_SX_CLASS_ATTRIBUTES>-HRY_ENTITY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_USMD_SX_CLASS_ATTRIBUTES-APPL, sy-vline,
  WA_USMD_SX_CLASS_ATTRIBUTES-DIS_SYSTEM, sy-vline,
  WA_USMD_SX_CLASS_ATTRIBUTES-OUTB_IMPL, sy-vline,
  WA_USMD_SX_CLASS_ATTRIBUTES-BO, sy-vline,
  WA_USMD_SX_CLASS_ATTRIBUTES-MODEL, sy-vline,
  WA_USMD_SX_CLASS_ATTRIBUTES-PACK_SIZE_BULK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_USMD_SX_CLASS_ATTRIBUTES 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_USMD_SX_CLASS_ATTRIBUTES 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_USMD_SX_CLASS_ATTRIBUTES INTO WA_USMD_SX_CLASS_ATTRIBUTES.


*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 EDITION_TO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_USMD_SX_CLASS_ATTRIBUTES-EDITION_TO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_USMD_SX_CLASS_ATTRIBUTES-EDITION_TO.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field CREQUEST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_USMD_SX_CLASS_ATTRIBUTES-CREQUEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_USMD_SX_CLASS_ATTRIBUTES-CREQUEST.
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_USMD_SX_CLASS_ATTRIBUTES_STR, 
EDITION_TO TYPE STRING,
EDITION_FROM TYPE STRING,
EDITION_CREQ TYPE STRING,
CREQUEST TYPE STRING,
HRY_ENTITY TYPE STRING,
APPL TYPE STRING,
DIS_SYSTEM TYPE STRING,
OUTB_IMPL TYPE STRING,
BO TYPE STRING,
MODEL TYPE STRING,
PACK_SIZE_BULK TYPE STRING,
EDITION_USE TYPE STRING,
DELTA TYPE STRING,
SKIP_ACTUAL_OUTB_IMPL TYPE STRING,
FOBJ TYPE STRING,
MAIN_ENTITY TYPE STRING,
STEPNR TYPE STRING,
T_ENTITY_MAPPING TYPE STRING,
T_ENTITY_VALIDITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_USMD_SX_CLASS_ATTRIBUTES_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_USMD_SX_CLASS_ATTRIBUTES_STR-EDITION_TO sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-EDITION_FROM sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-EDITION_CREQ sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-CREQUEST sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-HRY_ENTITY sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-APPL sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-DIS_SYSTEM sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-OUTB_IMPL sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-BO sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-MODEL sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-PACK_SIZE_BULK sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-EDITION_USE sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-DELTA sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-SKIP_ACTUAL_OUTB_IMPL sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-FOBJ sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-MAIN_ENTITY sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-STEPNR sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-T_ENTITY_MAPPING sy-vline 
WA_USMD_SX_CLASS_ATTRIBUTES_STR-T_ENTITY_VALIDITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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