ABAP Select data from SAP table FKKCRESCH_DISPLAY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKCRESCH_DISPLAY
*  INTO TABLE @DATA(IT_FKKCRESCH_DISPLAY2).
*--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_FKKCRESCH_DISPLAY INDEX 1 INTO DATA(WA_FKKCRESCH_DISPLAY2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKCRESCH_DISPLAY-ZTART, sy-vline,
  WA_FKKCRESCH_DISPLAY-ZTNUM, sy-vline,
  WA_FKKCRESCH_DISPLAY-LAUFD, sy-vline,
  WA_FKKCRESCH_DISPLAY-LAUFI, sy-vline,
  WA_FKKCRESCH_DISPLAY-BUKRS, sy-vline,
  WA_FKKCRESCH_DISPLAY-BUKRS_TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKCRESCH_DISPLAY 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_FKKCRESCH_DISPLAY 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_FKKCRESCH_DISPLAY INTO WA_FKKCRESCH_DISPLAY.


*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_FKKCRESCH_DISPLAY-ZTNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKCRESCH_DISPLAY-ZTNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ESCHDOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKCRESCH_DISPLAY-ESCHDOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKCRESCH_DISPLAY-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_FKKCRESCH_DISPLAY_STR, 
HERKF TYPE STRING,
ORG1T TYPE STRING,
ORG1R TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
ZTART TYPE STRING,
ZTNUM TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
BUKRS TYPE STRING,
BUKRS_TEXT TYPE STRING,
HKTID_TEXT TYPE STRING,
ESCHDT TYPE STRING,
ESCHRC_ORI TYPE STRING,
ESCHTYPE TYPE STRING,
ESCHSTAT TYPE STRING,
RWBTR TYPE STRING,
WAERS TYPE STRING,
ESCHRC TYPE STRING,
ESCHRC_TEXT TYPE STRING,
ESCHSTART TYPE STRING,
ESCHDATE TYPE STRING,
ESCHPROCSTAT TYPE STRING,
ESCHPROCSTAT_TEXT TYPE STRING,
ESCHPROCTYPE TYPE STRING,
ESCHPROCTYPE_TEXT TYPE STRING,
ESCHDOCNR TYPE STRING,
ESCHCRDATE TYPE STRING,
ESCHCRTIME TYPE STRING,
ESCHCRNAME TYPE STRING,
ESCHKEY TYPE STRING,
CORR_DATA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKCRESCH_DISPLAY_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_FKKCRESCH_DISPLAY_STR-HERKF sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ORG1T sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ORG1R sy-vline 
WA_FKKCRESCH_DISPLAY_STR-HBKID sy-vline 
WA_FKKCRESCH_DISPLAY_STR-HKTID sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ZTART sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ZTNUM sy-vline 
WA_FKKCRESCH_DISPLAY_STR-LAUFD sy-vline 
WA_FKKCRESCH_DISPLAY_STR-LAUFI sy-vline 
WA_FKKCRESCH_DISPLAY_STR-BUKRS sy-vline 
WA_FKKCRESCH_DISPLAY_STR-BUKRS_TEXT sy-vline 
WA_FKKCRESCH_DISPLAY_STR-HKTID_TEXT sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHDT sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHRC_ORI sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHTYPE sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHSTAT sy-vline 
WA_FKKCRESCH_DISPLAY_STR-RWBTR sy-vline 
WA_FKKCRESCH_DISPLAY_STR-WAERS sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHRC sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHRC_TEXT sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHSTART sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHDATE sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHPROCSTAT sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHPROCSTAT_TEXT sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHPROCTYPE sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHPROCTYPE_TEXT sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHDOCNR sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHCRDATE sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHCRTIME sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHCRNAME sy-vline 
WA_FKKCRESCH_DISPLAY_STR-ESCHKEY sy-vline 
WA_FKKCRESCH_DISPLAY_STR-CORR_DATA sy-vline      INTO ld_text SEPARATED BY SPACE.

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