ABAP Select data from SAP table DFKKINVBILL_LOG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKINVBILL_LOG
*  INTO TABLE @DATA(IT_DFKKINVBILL_LOG2).
*--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_DFKKINVBILL_LOG INDEX 1 INTO DATA(WA_DFKKINVBILL_LOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKINVBILL_LOG>-MANDT = 1.
<DFKKINVBILL_LOG>-CRDATE = 1.
<DFKKINVBILL_LOG>-BILL_TYPE = 1.
<DFKKINVBILL_LOG>-BILL_PROCESS = 1.
<DFKKINVBILL_LOG>-LOGUUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKINVBILL_LOG-BILLRUNNO, sy-vline,
  WA_DFKKINVBILL_LOG-BILLRUN_REF, sy-vline,
  WA_DFKKINVBILL_LOG-CRNAME, sy-vline,
  WA_DFKKINVBILL_LOG-SRCPROCESS, sy-vline,
  WA_DFKKINVBILL_LOG-SRCDOCTYPE, sy-vline,
  WA_DFKKINVBILL_LOG-TARGPROCESS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKINVBILL_LOG 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_DFKKINVBILL_LOG 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_DFKKINVBILL_LOG INTO WA_DFKKINVBILL_LOG.


*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_DFKKINVBILL_LOG_STR, 
MANDT TYPE STRING,
CRDATE TYPE STRING,
BILL_TYPE TYPE STRING,
BILL_PROCESS TYPE STRING,
LOGUUID TYPE STRING,
BILLRUNNO TYPE STRING,
BILLRUN_REF TYPE STRING,
CRNAME TYPE STRING,
SRCPROCESS TYPE STRING,
SRCDOCTYPE TYPE STRING,
TARGPROCESS TYPE STRING,
SUBPROCESS TYPE STRING,
BITCAT TYPE STRING,
CITCAT TYPE STRING,
SIMULATED TYPE STRING,
XREVERSAL TYPE STRING,
INVREL TYPE STRING,
MASSRUN TYPE STRING,
RUNKEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKINVBILL_LOG_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_DFKKINVBILL_LOG_STR-MANDT sy-vline 
WA_DFKKINVBILL_LOG_STR-CRDATE sy-vline 
WA_DFKKINVBILL_LOG_STR-BILL_TYPE sy-vline 
WA_DFKKINVBILL_LOG_STR-BILL_PROCESS sy-vline 
WA_DFKKINVBILL_LOG_STR-LOGUUID sy-vline 
WA_DFKKINVBILL_LOG_STR-BILLRUNNO sy-vline 
WA_DFKKINVBILL_LOG_STR-BILLRUN_REF sy-vline 
WA_DFKKINVBILL_LOG_STR-CRNAME sy-vline 
WA_DFKKINVBILL_LOG_STR-SRCPROCESS sy-vline 
WA_DFKKINVBILL_LOG_STR-SRCDOCTYPE sy-vline 
WA_DFKKINVBILL_LOG_STR-TARGPROCESS sy-vline 
WA_DFKKINVBILL_LOG_STR-SUBPROCESS sy-vline 
WA_DFKKINVBILL_LOG_STR-BITCAT sy-vline 
WA_DFKKINVBILL_LOG_STR-CITCAT sy-vline 
WA_DFKKINVBILL_LOG_STR-SIMULATED sy-vline 
WA_DFKKINVBILL_LOG_STR-XREVERSAL sy-vline 
WA_DFKKINVBILL_LOG_STR-INVREL sy-vline 
WA_DFKKINVBILL_LOG_STR-MASSRUN sy-vline 
WA_DFKKINVBILL_LOG_STR-RUNKEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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