ABAP Select data from SAP table GMKU_S_LVALXXPART into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GMKU_S_LVALXXPART
*  INTO TABLE @DATA(IT_GMKU_S_LVALXXPART2).
*--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_GMKU_S_LVALXXPART INDEX 1 INTO DATA(WA_GMKU_S_LVALXXPART2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GMKU_S_LVALXXPART>-LVAL01 = 1.
<GMKU_S_LVALXXPART>-LVAL02 = 1.
<GMKU_S_LVALXXPART>-LVAL03 = 1.
<GMKU_S_LVALXXPART>-LVAL04 = 1.
<GMKU_S_LVALXXPART>-LVAL05 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GMKU_S_LVALXXPART-LVAL06, sy-vline,
  WA_GMKU_S_LVALXXPART-LVAL07, sy-vline,
  WA_GMKU_S_LVALXXPART-LVAL08, sy-vline,
  WA_GMKU_S_LVALXXPART-LVAL09, sy-vline,
  WA_GMKU_S_LVALXXPART-LVAL10, sy-vline,
  WA_GMKU_S_LVALXXPART-LVAL11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GMKU_S_LVALXXPART 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_GMKU_S_LVALXXPART 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_GMKU_S_LVALXXPART INTO WA_GMKU_S_LVALXXPART.


*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_GMKU_S_LVALXXPART_STR, 
LVAL01 TYPE STRING,
LVAL02 TYPE STRING,
LVAL03 TYPE STRING,
LVAL04 TYPE STRING,
LVAL05 TYPE STRING,
LVAL06 TYPE STRING,
LVAL07 TYPE STRING,
LVAL08 TYPE STRING,
LVAL09 TYPE STRING,
LVAL10 TYPE STRING,
LVAL11 TYPE STRING,
LVAL12 TYPE STRING,
LVAL13 TYPE STRING,
LVAL14 TYPE STRING,
LVAL15 TYPE STRING,
LVAL16 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GMKU_S_LVALXXPART_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_GMKU_S_LVALXXPART_STR-LVAL01 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL02 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL03 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL04 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL05 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL06 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL07 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL08 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL09 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL10 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL11 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL12 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL13 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL14 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL15 sy-vline 
WA_GMKU_S_LVALXXPART_STR-LVAL16 sy-vline      INTO ld_text SEPARATED BY SPACE.

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