ABAP Select data from SAP table DFKKEXTDOC2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DFKKEXTDOC2 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 DFKKEXTDOC2. 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 DFKKEXTDOC2 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_DFKKEXTDOC2 TYPE STANDARD TABLE OF DFKKEXTDOC2,
      WA_DFKKEXTDOC2 TYPE DFKKEXTDOC2,
      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: <DFKKEXTDOC2> TYPE DFKKEXTDOC2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DFKKEXTDOC2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DFKKEXTDOC2
  INTO TABLE IT_DFKKEXTDOC2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKEXTDOC2
*  INTO TABLE @DATA(IT_DFKKEXTDOC22).
*--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_DFKKEXTDOC2 INDEX 1 INTO DATA(WA_DFKKEXTDOC22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DFKKEXTDOC2 ASSIGNING <DFKKEXTDOC2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKEXTDOC2>-MANDT = 1.
<DFKKEXTDOC2>-EXKEY = 1.
<DFKKEXTDOC2>-EXKID = 1.
<DFKKEXTDOC2>-EXBELX = 1.
<DFKKEXTDOC2>-BUKRS = 1.

ENDLOOP.

LOOP AT IT_DFKKEXTDOC2 INTO WA_DFKKEXTDOC2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKEXTDOC2-GJAHR, sy-vline,
  WA_DFKKEXTDOC2-OBJECT, sy-vline,
  WA_DFKKEXTDOC2-SUBOBJECT, sy-vline,
  WA_DFKKEXTDOC2-NRRANGENR, sy-vline,
  WA_DFKKEXTDOC2-TOYEAR, sy-vline,
  WA_DFKKEXTDOC2-ENC_STRING, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKEXTDOC2 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_DFKKEXTDOC2 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_DFKKEXTDOC2 INTO WA_DFKKEXTDOC2.


*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 GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_DFKKEXTDOC2-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKEXTDOC2-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field TOYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_DFKKEXTDOC2-TOYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKEXTDOC2-TOYEAR.
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_DFKKEXTDOC2_STR, 
MANDT TYPE STRING,
EXKEY TYPE STRING,
EXKID TYPE STRING,
EXBELX TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
OBJECT TYPE STRING,
SUBOBJECT TYPE STRING,
NRRANGENR TYPE STRING,
TOYEAR TYPE STRING,
ENC_STRING TYPE STRING,
ENC_XSTRING TYPE STRING,
ENC_ATTR1 TYPE STRING,
ENC_ATTR2 TYPE STRING,
ENC_ATTR3 TYPE STRING,
ENC_ATTR4 TYPE STRING,
ENC_ATTR5 TYPE STRING,
SDATAX TYPE STRING,
ENCREQ TYPE STRING,
ENCCRE TYPE STRING,
ENC_USER TYPE STRING,
ENC_DATE TYPE STRING,
ENC_TIME TYPE STRING,
ENCBATCH TYPE STRING,
CHANGE_USER TYPE STRING,
CHANGE_DATE TYPE STRING,
CHANGE_TIME TYPE STRING,
PT_DS_PRTPAT_PRE TYPE STRING,
PT_INV_DATE TYPE STRING,
PT_INV_NO TYPE STRING,
PT_INV_CRESYS TYPE STRING,
PT_INV_TOTAL TYPE STRING,
PT_DS_PRTPAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKEXTDOC2_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_DFKKEXTDOC2_STR-MANDT sy-vline 
WA_DFKKEXTDOC2_STR-EXKEY sy-vline 
WA_DFKKEXTDOC2_STR-EXKID sy-vline 
WA_DFKKEXTDOC2_STR-EXBELX sy-vline 
WA_DFKKEXTDOC2_STR-BUKRS sy-vline 
WA_DFKKEXTDOC2_STR-GJAHR sy-vline 
WA_DFKKEXTDOC2_STR-OBJECT sy-vline 
WA_DFKKEXTDOC2_STR-SUBOBJECT sy-vline 
WA_DFKKEXTDOC2_STR-NRRANGENR sy-vline 
WA_DFKKEXTDOC2_STR-TOYEAR sy-vline 
WA_DFKKEXTDOC2_STR-ENC_STRING sy-vline 
WA_DFKKEXTDOC2_STR-ENC_XSTRING sy-vline 
WA_DFKKEXTDOC2_STR-ENC_ATTR1 sy-vline 
WA_DFKKEXTDOC2_STR-ENC_ATTR2 sy-vline 
WA_DFKKEXTDOC2_STR-ENC_ATTR3 sy-vline 
WA_DFKKEXTDOC2_STR-ENC_ATTR4 sy-vline 
WA_DFKKEXTDOC2_STR-ENC_ATTR5 sy-vline 
WA_DFKKEXTDOC2_STR-SDATAX sy-vline 
WA_DFKKEXTDOC2_STR-ENCREQ sy-vline 
WA_DFKKEXTDOC2_STR-ENCCRE sy-vline 
WA_DFKKEXTDOC2_STR-ENC_USER sy-vline 
WA_DFKKEXTDOC2_STR-ENC_DATE sy-vline 
WA_DFKKEXTDOC2_STR-ENC_TIME sy-vline 
WA_DFKKEXTDOC2_STR-ENCBATCH sy-vline 
WA_DFKKEXTDOC2_STR-CHANGE_USER sy-vline 
WA_DFKKEXTDOC2_STR-CHANGE_DATE sy-vline 
WA_DFKKEXTDOC2_STR-CHANGE_TIME sy-vline 
WA_DFKKEXTDOC2_STR-PT_DS_PRTPAT_PRE sy-vline 
WA_DFKKEXTDOC2_STR-PT_INV_DATE sy-vline 
WA_DFKKEXTDOC2_STR-PT_INV_NO sy-vline 
WA_DFKKEXTDOC2_STR-PT_INV_CRESYS sy-vline 
WA_DFKKEXTDOC2_STR-PT_INV_TOTAL sy-vline 
WA_DFKKEXTDOC2_STR-PT_DS_PRTPAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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