ABAP Select data from SAP table ULCM_S_CATEGORY_ITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ULCM_S_CATEGORY_ITEM
*  INTO TABLE @DATA(IT_ULCM_S_CATEGORY_ITEM2).
*--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_ULCM_S_CATEGORY_ITEM INDEX 1 INTO DATA(WA_ULCM_S_CATEGORY_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ULCM_S_CATEGORY_ITEM>-LGLCNTNTMCATEGORY = 1.
<ULCM_S_CATEGORY_ITEM>-LGLCNTNTMPARENTCATEGORY = 1.
<ULCM_S_CATEGORY_ITEM>-LGLCNTNTMCATDISPL = 1.
<ULCM_S_CATEGORY_ITEM>-LGLCNTNTMCATLEVEL = 1.
<ULCM_S_CATEGORY_ITEM>-LGLCNTNTMCATTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ULCM_S_CATEGORY_ITEM-LGLCNTNTMCATISSELECT, sy-vline,
  WA_ULCM_S_CATEGORY_ITEM-LGLCNTNTMCATISMULTISELECTION, sy-vline,
  WA_ULCM_S_CATEGORY_ITEM-LGLCNTNTMCATISOBSOLETE, sy-vline,
  WA_ULCM_S_CATEGORY_ITEM-LGLCNTNTMROOTCATEGORY, sy-vline,
  WA_ULCM_S_CATEGORY_ITEM-LGLCNTNTMCATMODEL, sy-vline,
  WA_ULCM_S_CATEGORY_ITEM-LGLCNTNTMCATEGORYVALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ULCM_S_CATEGORY_ITEM 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_ULCM_S_CATEGORY_ITEM 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_ULCM_S_CATEGORY_ITEM INTO WA_ULCM_S_CATEGORY_ITEM.


*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_ULCM_S_CATEGORY_ITEM_STR, 
LGLCNTNTMCATEGORY TYPE STRING,
LGLCNTNTMPARENTCATEGORY TYPE STRING,
LGLCNTNTMCATDISPL TYPE STRING,
LGLCNTNTMCATLEVEL TYPE STRING,
LGLCNTNTMCATTYPE TYPE STRING,
LGLCNTNTMCATISSELECT TYPE STRING,
LGLCNTNTMCATISMULTISELECTION TYPE STRING,
LGLCNTNTMCATISOBSOLETE TYPE STRING,
LGLCNTNTMROOTCATEGORY TYPE STRING,
LGLCNTNTMCATMODEL TYPE STRING,
LGLCNTNTMCATEGORYVALUE TYPE STRING,
LGLCNTNTMCATISUPDATEFROMTABLE TYPE STRING,
LGLCNTNTMCREATEDUTCDATETIME TYPE STRING,
LGLCNTNTMCREATEDBYUSER TYPE STRING,
LGLCNTNTMCHANGEDUTCDATETIME TYPE STRING,
LGLCNTNTMCHANGEDBYUSER TYPE STRING,
LGLCNTNTMCATEGORYNAME TYPE STRING,
LGLCNTNTMCATPURPOSE TYPE STRING,
LGLCNTNTMCATISSYSTGENERATED TYPE STRING,
LGLCNTNTMCATCONSTANT TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ULCM_S_CATEGORY_ITEM_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_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATEGORY sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMPARENTCATEGORY sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATDISPL sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATLEVEL sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATTYPE sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATISSELECT sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATISMULTISELECTION sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATISOBSOLETE sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMROOTCATEGORY sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATMODEL sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATEGORYVALUE sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATISUPDATEFROMTABLE sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCREATEDUTCDATETIME sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCREATEDBYUSER sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCHANGEDUTCDATETIME sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCHANGEDBYUSER sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATEGORYNAME sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATPURPOSE sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATISSYSTGENERATED sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-LGLCNTNTMCATCONSTANT sy-vline 
WA_ULCM_S_CATEGORY_ITEM_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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