ABAP Select data from SAP table FKK_LOCK_SELECTION_MD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKK_LOCK_SELECTION_MD
*  INTO TABLE @DATA(IT_FKK_LOCK_SELECTION_MD2).
*--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_FKK_LOCK_SELECTION_MD INDEX 1 INTO DATA(WA_FKK_LOCK_SELECTION_MD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKK_LOCK_SELECTION_MD>-CLIENT = 1.
<FKK_LOCK_SELECTION_MD>-LOOBJ1 = 1.
<FKK_LOCK_SELECTION_MD>-LOTYP = 1.
<FKK_LOCK_SELECTION_MD>-PROID = 1.
<FKK_LOCK_SELECTION_MD>-LOCKR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKK_LOCK_SELECTION_MD-FDATE, sy-vline,
  WA_FKK_LOCK_SELECTION_MD-TDATE, sy-vline,
  WA_FKK_LOCK_SELECTION_MD-GPART, sy-vline,
  WA_FKK_LOCK_SELECTION_MD-VKONT, sy-vline,
  WA_FKK_LOCK_SELECTION_MD-COND_LOOBJ, sy-vline,
  WA_FKK_LOCK_SELECTION_MD-ACTKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKK_LOCK_SELECTION_MD 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_FKK_LOCK_SELECTION_MD 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_FKK_LOCK_SELECTION_MD INTO WA_FKK_LOCK_SELECTION_MD.


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

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

*Conversion exit ALPHA, internal->external for field VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKK_LOCK_SELECTION_MD-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKK_LOCK_SELECTION_MD-VTREF.
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_FKK_LOCK_SELECTION_MD_STR, 
CLIENT TYPE STRING,
LOOBJ1 TYPE STRING,
LOTYP TYPE STRING,
PROID TYPE STRING,
LOCKR TYPE STRING,
FDATE TYPE STRING,
TDATE TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
COND_LOOBJ TYPE STRING,
ACTKEY TYPE STRING,
UNAME TYPE STRING,
ADATUM TYPE STRING,
AZEIT TYPE STRING,
PROTECTED TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
VTREF TYPE STRING,
VTPID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKK_LOCK_SELECTION_MD_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_FKK_LOCK_SELECTION_MD_STR-CLIENT sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-LOOBJ1 sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-LOTYP sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-PROID sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-LOCKR sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-FDATE sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-TDATE sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-GPART sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-VKONT sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-COND_LOOBJ sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-ACTKEY sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-UNAME sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-ADATUM sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-AZEIT sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-PROTECTED sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-LAUFD sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-LAUFI sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-VTREF sy-vline 
WA_FKK_LOCK_SELECTION_MD_STR-VTPID sy-vline      INTO ld_text SEPARATED BY SPACE.

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