ABAP Select data from SAP table FKKINV_FUNCTIONS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKKINV_FUNCTIONS 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_FUNCTIONS. 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_FUNCTIONS 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_FUNCTIONS TYPE STANDARD TABLE OF FKKINV_FUNCTIONS,
      WA_FKKINV_FUNCTIONS TYPE FKKINV_FUNCTIONS,
      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_FUNCTIONS> TYPE FKKINV_FUNCTIONS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKINV_FUNCTIONS
*  INTO TABLE @DATA(IT_FKKINV_FUNCTIONS2).
*--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_FUNCTIONS INDEX 1 INTO DATA(WA_FKKINV_FUNCTIONS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKINV_FUNCTIONS>-ACCT_MAINT = 1.
<FKKINV_FUNCTIONS>-ACCT_MAINTX = 1.
<FKKINV_FUNCTIONS>-ACCT_MAINTXD = 1.
<FKKINV_FUNCTIONS>-ACCT_MAINT_D = 1.
<FKKINV_FUNCTIONS>-ACTIVATE_OI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKINV_FUNCTIONS-ACTIVATE_RDI, sy-vline,
  WA_FKKINV_FUNCTIONS-ADD_DOC, sy-vline,
  WA_FKKINV_FUNCTIONS-BOLLO_CALC, sy-vline,
  WA_FKKINV_FUNCTIONS-BW_INTEGR, sy-vline,
  WA_FKKINV_FUNCTIONS-CHARGE_DISC, sy-vline,
  WA_FKKINV_FUNCTIONS-CHARGE_DISC2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKINV_FUNCTIONS 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_FUNCTIONS 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_FUNCTIONS INTO WA_FKKINV_FUNCTIONS.


*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_FUNCTIONS_STR, 
ACCT_MAINT TYPE STRING,
ACCT_MAINTX TYPE STRING,
ACCT_MAINTXD TYPE STRING,
ACCT_MAINT_D TYPE STRING,
ACTIVATE_OI TYPE STRING,
ACTIVATE_RDI TYPE STRING,
ADD_DOC TYPE STRING,
BOLLO_CALC TYPE STRING,
BW_INTEGR TYPE STRING,
CHARGE_DISC TYPE STRING,
CHARGE_DISC2 TYPE STRING,
DEBIT_STAT_I TYPE STRING,
DEF_REVENUES TYPE STRING,
DEF_REV_BY_E TYPE STRING,
DOC_CONT TYPE STRING,
DUNNING_PROP TYPE STRING,
HIST_ITEMS TYPE STRING,
INTEREST_DEB TYPE STRING,
INTEREST_SEC TYPE STRING,
INV_CYCLE TYPE STRING,
INV_ADHOC TYPE STRING,
INV_BILL_DOC TYPE STRING,
INV_COLLBILL TYPE STRING,
INV_OFFSET TYPE STRING,
INV_SD_DOC TYPE STRING,
INV_VBRK_DOC TYPE STRING,
INSTPLAN_DUE TYPE STRING,
OFFIC_DOC_NO TYPE STRING,
PAYFORM TYPE STRING,
PAYM_HISTORY TYPE STRING,
PAYM_METHOD TYPE STRING,
PAYM_REF TYPE STRING,
PCARD_PAYMET TYPE STRING,
PCARD_PAYMNT TYPE STRING,
PPACC_REFILL TYPE STRING,
PPACC_MAINT TYPE STRING,
PPACC_MAINTD TYPE STRING,
PRELIM_INV TYPE STRING,
REV_STAT_IT TYPE STRING,
REVERSAL TYPE STRING,
RND_INV_DOC TYPE STRING,
RND_POST_DOC TYPE STRING,
SECURITY_ADJ TYPE STRING,
SECURITY_CRT TYPE STRING,
SEPA_PRENOT TYPE STRING,
SUBINV_LIST TYPE STRING,
SUBINV_TRIG TYPE STRING,
TRANSFER_IT TYPE STRING,
VALIDAT_INV TYPE STRING,
VALIDAT_SRC TYPE STRING,
WRITEOFF TYPE STRING,
TAX_NOTIF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKINV_FUNCTIONS_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_FUNCTIONS_STR-ACCT_MAINT sy-vline 
WA_FKKINV_FUNCTIONS_STR-ACCT_MAINTX sy-vline 
WA_FKKINV_FUNCTIONS_STR-ACCT_MAINTXD sy-vline 
WA_FKKINV_FUNCTIONS_STR-ACCT_MAINT_D sy-vline 
WA_FKKINV_FUNCTIONS_STR-ACTIVATE_OI sy-vline 
WA_FKKINV_FUNCTIONS_STR-ACTIVATE_RDI sy-vline 
WA_FKKINV_FUNCTIONS_STR-ADD_DOC sy-vline 
WA_FKKINV_FUNCTIONS_STR-BOLLO_CALC sy-vline 
WA_FKKINV_FUNCTIONS_STR-BW_INTEGR sy-vline 
WA_FKKINV_FUNCTIONS_STR-CHARGE_DISC sy-vline 
WA_FKKINV_FUNCTIONS_STR-CHARGE_DISC2 sy-vline 
WA_FKKINV_FUNCTIONS_STR-DEBIT_STAT_I sy-vline 
WA_FKKINV_FUNCTIONS_STR-DEF_REVENUES sy-vline 
WA_FKKINV_FUNCTIONS_STR-DEF_REV_BY_E sy-vline 
WA_FKKINV_FUNCTIONS_STR-DOC_CONT sy-vline 
WA_FKKINV_FUNCTIONS_STR-DUNNING_PROP sy-vline 
WA_FKKINV_FUNCTIONS_STR-HIST_ITEMS sy-vline 
WA_FKKINV_FUNCTIONS_STR-INTEREST_DEB sy-vline 
WA_FKKINV_FUNCTIONS_STR-INTEREST_SEC sy-vline 
WA_FKKINV_FUNCTIONS_STR-INV_CYCLE sy-vline 
WA_FKKINV_FUNCTIONS_STR-INV_ADHOC sy-vline 
WA_FKKINV_FUNCTIONS_STR-INV_BILL_DOC sy-vline 
WA_FKKINV_FUNCTIONS_STR-INV_COLLBILL sy-vline 
WA_FKKINV_FUNCTIONS_STR-INV_OFFSET sy-vline 
WA_FKKINV_FUNCTIONS_STR-INV_SD_DOC sy-vline 
WA_FKKINV_FUNCTIONS_STR-INV_VBRK_DOC sy-vline 
WA_FKKINV_FUNCTIONS_STR-INSTPLAN_DUE sy-vline 
WA_FKKINV_FUNCTIONS_STR-OFFIC_DOC_NO sy-vline 
WA_FKKINV_FUNCTIONS_STR-PAYFORM sy-vline 
WA_FKKINV_FUNCTIONS_STR-PAYM_HISTORY sy-vline 
WA_FKKINV_FUNCTIONS_STR-PAYM_METHOD sy-vline 
WA_FKKINV_FUNCTIONS_STR-PAYM_REF sy-vline 
WA_FKKINV_FUNCTIONS_STR-PCARD_PAYMET sy-vline 
WA_FKKINV_FUNCTIONS_STR-PCARD_PAYMNT sy-vline 
WA_FKKINV_FUNCTIONS_STR-PPACC_REFILL sy-vline 
WA_FKKINV_FUNCTIONS_STR-PPACC_MAINT sy-vline 
WA_FKKINV_FUNCTIONS_STR-PPACC_MAINTD sy-vline 
WA_FKKINV_FUNCTIONS_STR-PRELIM_INV sy-vline 
WA_FKKINV_FUNCTIONS_STR-REV_STAT_IT sy-vline 
WA_FKKINV_FUNCTIONS_STR-REVERSAL sy-vline 
WA_FKKINV_FUNCTIONS_STR-RND_INV_DOC sy-vline 
WA_FKKINV_FUNCTIONS_STR-RND_POST_DOC sy-vline 
WA_FKKINV_FUNCTIONS_STR-SECURITY_ADJ sy-vline 
WA_FKKINV_FUNCTIONS_STR-SECURITY_CRT sy-vline 
WA_FKKINV_FUNCTIONS_STR-SEPA_PRENOT sy-vline 
WA_FKKINV_FUNCTIONS_STR-SUBINV_LIST sy-vline 
WA_FKKINV_FUNCTIONS_STR-SUBINV_TRIG sy-vline 
WA_FKKINV_FUNCTIONS_STR-TRANSFER_IT sy-vline 
WA_FKKINV_FUNCTIONS_STR-VALIDAT_INV sy-vline 
WA_FKKINV_FUNCTIONS_STR-VALIDAT_SRC sy-vline 
WA_FKKINV_FUNCTIONS_STR-WRITEOFF sy-vline 
WA_FKKINV_FUNCTIONS_STR-TAX_NOTIF sy-vline      INTO ld_text SEPARATED BY SPACE.

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