ABAP Select data from SAP table FCKMLLACRUCT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FCKMLLACRUCT
*  INTO TABLE @DATA(IT_FCKMLLACRUCT2).
*--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_FCKMLLACRUCT INDEX 1 INTO DATA(WA_FCKMLLACRUCT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FCKMLLACRUCT>-MANDT = 1.
<FCKMLLACRUCT>-KALNR = 1.
<FCKMLLACRUCT>-BDATJ = 1.
<FCKMLLACRUCT>-POPER = 1.
<FCKMLLACRUCT>-UNTPER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FCKMLLACRUCT-CURTP, sy-vline,
  WA_FCKMLLACRUCT-TOGBTR, sy-vline,
  WA_FCKMLLACRUCT-TOFBTR, sy-vline,
  WA_FCKMLLACRUCT-TOGBTRD, sy-vline,
  WA_FCKMLLACRUCT-TOE, sy-vline,
  WA_FCKMLLACRUCT-WAERS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FCKMLLACRUCT 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_FCKMLLACRUCT 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_FCKMLLACRUCT INTO WA_FCKMLLACRUCT.


*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 GJAHR, internal->external for field BDATJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FCKMLLACRUCT-BDATJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCKMLLACRUCT-BDATJ.
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_FCKMLLACRUCT_STR, 
MANDT TYPE STRING,
KALNR TYPE STRING,
BDATJ TYPE STRING,
POPER TYPE STRING,
UNTPER TYPE STRING,
CURTP TYPE STRING,
TOGBTR TYPE STRING,
TOFBTR TYPE STRING,
TOGBTRD TYPE STRING,
TOE TYPE STRING,
WAERS TYPE STRING,
TOGBTR_S TYPE STRING,
TOFBTR_S TYPE STRING,
TOGBTRD_S TYPE STRING,
TOE_S TYPE STRING,
WAERS_S TYPE STRING,
BWSTRAT TYPE STRING,
NO_SETTLE TYPE STRING,
SAPRL TYPE STRING,
SDM_VERSION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FCKMLLACRUCT_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_FCKMLLACRUCT_STR-MANDT sy-vline 
WA_FCKMLLACRUCT_STR-KALNR sy-vline 
WA_FCKMLLACRUCT_STR-BDATJ sy-vline 
WA_FCKMLLACRUCT_STR-POPER sy-vline 
WA_FCKMLLACRUCT_STR-UNTPER sy-vline 
WA_FCKMLLACRUCT_STR-CURTP sy-vline 
WA_FCKMLLACRUCT_STR-TOGBTR sy-vline 
WA_FCKMLLACRUCT_STR-TOFBTR sy-vline 
WA_FCKMLLACRUCT_STR-TOGBTRD sy-vline 
WA_FCKMLLACRUCT_STR-TOE sy-vline 
WA_FCKMLLACRUCT_STR-WAERS sy-vline 
WA_FCKMLLACRUCT_STR-TOGBTR_S sy-vline 
WA_FCKMLLACRUCT_STR-TOFBTR_S sy-vline 
WA_FCKMLLACRUCT_STR-TOGBTRD_S sy-vline 
WA_FCKMLLACRUCT_STR-TOE_S sy-vline 
WA_FCKMLLACRUCT_STR-WAERS_S sy-vline 
WA_FCKMLLACRUCT_STR-BWSTRAT sy-vline 
WA_FCKMLLACRUCT_STR-NO_SETTLE sy-vline 
WA_FCKMLLACRUCT_STR-SAPRL sy-vline 
WA_FCKMLLACRUCT_STR-SDM_VERSION sy-vline      INTO ld_text SEPARATED BY SPACE.

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