ABAP Select data from SAP table FKKINV_UNIT_PARAMS_GFN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKINV_UNIT_PARAMS_GFN
*  INTO TABLE @DATA(IT_FKKINV_UNIT_PARAMS_GFN2).
*--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_FKKINV_UNIT_PARAMS_GFN INDEX 1 INTO DATA(WA_FKKINV_UNIT_PARAMS_GFN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKINV_UNIT_PARAMS_GFN>-CAINVCGUNITUUID = 1.
<FKKINV_UNIT_PARAMS_GFN>-CAAPPLICATIONAREA = 1.
<FKKINV_UNIT_PARAMS_GFN>-CAINVCGPROCESS = 1.
<FKKINV_UNIT_PARAMS_GFN>-CAINVCGTARGETPROCESS = 1.
<FKKINV_UNIT_PARAMS_GFN>-CARECONCILIATIONKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKINV_UNIT_PARAMS_GFN-CADOCUMENTORIGINCODE, sy-vline,
  WA_FKKINV_UNIT_PARAMS_GFN-CAPOSTINGDATE, sy-vline,
  WA_FKKINV_UNIT_PARAMS_GFN-DOCUMENTDATE, sy-vline,
  WA_FKKINV_UNIT_PARAMS_GFN-CAPERIODICCORRESPONDENCE, sy-vline,
  WA_FKKINV_UNIT_PARAMS_GFN-NFBUSINESSPLACE, sy-vline,
  WA_FKKINV_UNIT_PARAMS_GFN-CAINVCGISSIMULATIONRUN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKINV_UNIT_PARAMS_GFN 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_FKKINV_UNIT_PARAMS_GFN 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_FKKINV_UNIT_PARAMS_GFN INTO WA_FKKINV_UNIT_PARAMS_GFN.


*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_FKKINV_UNIT_PARAMS_GFN_STR, 
CAINVCGUNITUUID TYPE STRING,
CAAPPLICATIONAREA TYPE STRING,
CAINVCGPROCESS TYPE STRING,
CAINVCGTARGETPROCESS TYPE STRING,
CARECONCILIATIONKEY TYPE STRING,
CADOCUMENTORIGINCODE TYPE STRING,
CAPOSTINGDATE TYPE STRING,
DOCUMENTDATE TYPE STRING,
CAPERIODICCORRESPONDENCE TYPE STRING,
NFBUSINESSPLACE TYPE STRING,
CAINVCGISSIMULATIONRUN TYPE STRING,
ISTESTRUN TYPE STRING,
CAINVCGSIMLNISWTHOUTINVCGREQ TYPE STRING,
CADELETEINVCGREQFORINVCGSIMLN TYPE STRING,
PURREQNISCREATEDINEXPERTMODE TYPE STRING,
CAINVCGDOCISPREVIEW TYPE STRING,
CAISMASSRUN TYPE STRING,
CAMASSRUNINTERNALID TYPE STRING,
CAINVCGRUNEXTERNALREFERENCE TYPE STRING,
CANMBRRNGEFORMASSPROCGISACTIVE TYPE STRING,
CAINVCGUNITISNOTTOBESPLIT TYPE STRING,
CAMINDATABASESELBLOCKSIZEVALUE TYPE STRING,
CAINTERVALLOCKISSET TYPE STRING,
CARUNTIMECHECKISACTIVE TYPE STRING,
CARUNTIMECHECKDATE TYPE STRING,
CARUNTIMECHECKTIME TYPE STRING,
APPLICATIONLOGPROBLEMCLASS TYPE STRING,
CAINVCGTYPE TYPE STRING,
CAINVCGCATEGORY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKINV_UNIT_PARAMS_GFN_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_FKKINV_UNIT_PARAMS_GFN_STR-CAINVCGUNITUUID sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAAPPLICATIONAREA sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAINVCGPROCESS sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAINVCGTARGETPROCESS sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CARECONCILIATIONKEY sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CADOCUMENTORIGINCODE sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAPOSTINGDATE sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-DOCUMENTDATE sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAPERIODICCORRESPONDENCE sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-NFBUSINESSPLACE sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAINVCGISSIMULATIONRUN sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-ISTESTRUN sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAINVCGSIMLNISWTHOUTINVCGREQ sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CADELETEINVCGREQFORINVCGSIMLN sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-PURREQNISCREATEDINEXPERTMODE sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAINVCGDOCISPREVIEW sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAISMASSRUN sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAMASSRUNINTERNALID sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAINVCGRUNEXTERNALREFERENCE sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CANMBRRNGEFORMASSPROCGISACTIVE sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAINVCGUNITISNOTTOBESPLIT sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAMINDATABASESELBLOCKSIZEVALUE sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAINTERVALLOCKISSET sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CARUNTIMECHECKISACTIVE sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CARUNTIMECHECKDATE sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CARUNTIMECHECKTIME sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-APPLICATIONLOGPROBLEMCLASS sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAINVCGTYPE sy-vline 
WA_FKKINV_UNIT_PARAMS_GFN_STR-CAINVCGCATEGORY sy-vline      INTO ld_text SEPARATED BY SPACE.

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