ABAP Select data from SAP table DFKKCRESCH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKCRESCH
*  INTO TABLE @DATA(IT_DFKKCRESCH2).
*--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_DFKKCRESCH INDEX 1 INTO DATA(WA_DFKKCRESCH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKCRESCH>-MANDT = 1.
<DFKKCRESCH>-HERKF = 1.
<DFKKCRESCH>-ORG1T = 1.
<DFKKCRESCH>-ORG1R = 1.
<DFKKCRESCH>-HBKID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKCRESCH-HKTID, sy-vline,
  WA_DFKKCRESCH-ZTART, sy-vline,
  WA_DFKKCRESCH-ZTNUM, sy-vline,
  WA_DFKKCRESCH-ESCHKEY, sy-vline,
  WA_DFKKCRESCH-ESCHRC, sy-vline,
  WA_DFKKCRESCH-ESCHSTART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKCRESCH 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_DFKKCRESCH 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_DFKKCRESCH INTO WA_DFKKCRESCH.


*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 ALPHA, internal->external for field ZTNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKCRESCH-ZTNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKCRESCH-ZTNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ESCHDOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKCRESCH-ESCHDOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKCRESCH-ESCHDOCNR.
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_DFKKCRESCH_STR, 
MANDT TYPE STRING,
HERKF TYPE STRING,
ORG1T TYPE STRING,
ORG1R TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
ZTART TYPE STRING,
ZTNUM TYPE STRING,
ESCHKEY TYPE STRING,
ESCHRC TYPE STRING,
ESCHSTART TYPE STRING,
ESCHDATE TYPE STRING,
ESCHPROCSTAT TYPE STRING,
ESCHPROCTYPE TYPE STRING,
ESCHDOCNR TYPE STRING,
ESCHCRDATE TYPE STRING,
ESCHCRTIME TYPE STRING,
ESCHCRNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKCRESCH_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_DFKKCRESCH_STR-MANDT sy-vline 
WA_DFKKCRESCH_STR-HERKF sy-vline 
WA_DFKKCRESCH_STR-ORG1T sy-vline 
WA_DFKKCRESCH_STR-ORG1R sy-vline 
WA_DFKKCRESCH_STR-HBKID sy-vline 
WA_DFKKCRESCH_STR-HKTID sy-vline 
WA_DFKKCRESCH_STR-ZTART sy-vline 
WA_DFKKCRESCH_STR-ZTNUM sy-vline 
WA_DFKKCRESCH_STR-ESCHKEY sy-vline 
WA_DFKKCRESCH_STR-ESCHRC sy-vline 
WA_DFKKCRESCH_STR-ESCHSTART sy-vline 
WA_DFKKCRESCH_STR-ESCHDATE sy-vline 
WA_DFKKCRESCH_STR-ESCHPROCSTAT sy-vline 
WA_DFKKCRESCH_STR-ESCHPROCTYPE sy-vline 
WA_DFKKCRESCH_STR-ESCHDOCNR sy-vline 
WA_DFKKCRESCH_STR-ESCHCRDATE sy-vline 
WA_DFKKCRESCH_STR-ESCHCRTIME sy-vline 
WA_DFKKCRESCH_STR-ESCHCRNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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