ABAP Select data from SAP table ESKN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESKN
*  INTO TABLE @DATA(IT_ESKN2).
*--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_ESKN INDEX 1 INTO DATA(WA_ESKN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESKN>-MANDT = 1.
<ESKN>-PACKNO = 1.
<ESKN>-ZEKKN = 1.
<ESKN>-BEKKN = 1.
<ESKN>-LOEKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESKN-AEDAT, sy-vline,
  WA_ESKN-KFLAG, sy-vline,
  WA_ESKN-WPROZ, sy-vline,
  WA_ESKN-NETWR, sy-vline,
  WA_ESKN-SAKTO, sy-vline,
  WA_ESKN-GSBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESKN 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_ESKN 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_ESKN INTO WA_ESKN.


*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 SAKTO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESKN-SAKTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESKN-SAKTO.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESKN-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESKN-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESKN-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESKN-ANLN2.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_ESKN-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESKN-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_ESKN-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESKN-IMKEY.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit FMCIS, internal->external for field FIPOS
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_ESKN-FIPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESKN-FIPOS.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field GRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESKN-GRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESKN-GRANT_NBR.
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_ESKN_STR, 
MANDT TYPE STRING,
PACKNO TYPE STRING,
ZEKKN TYPE STRING,
BEKKN TYPE STRING,
LOEKZ TYPE STRING,
AEDAT TYPE STRING,
KFLAG TYPE STRING,
WPROZ TYPE STRING,
NETWR TYPE STRING,
SAKTO TYPE STRING,
GSBER TYPE STRING,
KOSTL TYPE STRING,
VBELN TYPE STRING,
VBELP TYPE STRING,
VETEN TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
AUFNR TYPE STRING,
KOKRS TYPE STRING,
XBKST TYPE STRING,
XBAUF TYPE STRING,
XBPRO TYPE STRING,
EREKZ TYPE STRING,
KSTRG TYPE STRING,
PAOBJNR TYPE STRING,
PRCTR TYPE STRING,
PS_PSP_PNR TYPE STRING,
NPLNR TYPE STRING,
AUFPL TYPE STRING,
IMKEY TYPE STRING,
APLZL TYPE STRING,
VPTNR TYPE STRING,
FIPOS TYPE STRING,
RECID TYPE STRING,
DUMMY_INCL_EEW_COBL TYPE STRING,
FISTL TYPE STRING,
GEBER TYPE STRING,
FKBER TYPE STRING,
MWSKZ TYPE STRING,
TXJCD TYPE STRING,
NAVNW TYPE STRING,
KBLNR TYPE STRING,
KBLPOS TYPE STRING,
DABRZ TYPE STRING,
LSTAR TYPE STRING,
PRZNR TYPE STRING,
GRANT_NBR TYPE STRING,
FM_SPLIT_BATCH TYPE STRING,
FM_SPLIT_BEGRU TYPE STRING,
BUDGET_PD TYPE STRING,
FMFGUS_KEY TYPE STRING,
_DATAAGING TYPE STRING,
TCOBJNR TYPE STRING,
DATEOFSERVICE TYPE STRING,
NOTAXCORR TYPE STRING,
DIFFOPTRATE TYPE STRING,
HASDIFFOPTRATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESKN_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_ESKN_STR-MANDT sy-vline 
WA_ESKN_STR-PACKNO sy-vline 
WA_ESKN_STR-ZEKKN sy-vline 
WA_ESKN_STR-BEKKN sy-vline 
WA_ESKN_STR-LOEKZ sy-vline 
WA_ESKN_STR-AEDAT sy-vline 
WA_ESKN_STR-KFLAG sy-vline 
WA_ESKN_STR-WPROZ sy-vline 
WA_ESKN_STR-NETWR sy-vline 
WA_ESKN_STR-SAKTO sy-vline 
WA_ESKN_STR-GSBER sy-vline 
WA_ESKN_STR-KOSTL sy-vline 
WA_ESKN_STR-VBELN sy-vline 
WA_ESKN_STR-VBELP sy-vline 
WA_ESKN_STR-VETEN sy-vline 
WA_ESKN_STR-ANLN1 sy-vline 
WA_ESKN_STR-ANLN2 sy-vline 
WA_ESKN_STR-AUFNR sy-vline 
WA_ESKN_STR-KOKRS sy-vline 
WA_ESKN_STR-XBKST sy-vline 
WA_ESKN_STR-XBAUF sy-vline 
WA_ESKN_STR-XBPRO sy-vline 
WA_ESKN_STR-EREKZ sy-vline 
WA_ESKN_STR-KSTRG sy-vline 
WA_ESKN_STR-PAOBJNR sy-vline 
WA_ESKN_STR-PRCTR sy-vline 
WA_ESKN_STR-PS_PSP_PNR sy-vline 
WA_ESKN_STR-NPLNR sy-vline 
WA_ESKN_STR-AUFPL sy-vline 
WA_ESKN_STR-IMKEY sy-vline 
WA_ESKN_STR-APLZL sy-vline 
WA_ESKN_STR-VPTNR sy-vline 
WA_ESKN_STR-FIPOS sy-vline 
WA_ESKN_STR-RECID sy-vline 
WA_ESKN_STR-DUMMY_INCL_EEW_COBL sy-vline 
WA_ESKN_STR-FISTL sy-vline 
WA_ESKN_STR-GEBER sy-vline 
WA_ESKN_STR-FKBER sy-vline 
WA_ESKN_STR-MWSKZ sy-vline 
WA_ESKN_STR-TXJCD sy-vline 
WA_ESKN_STR-NAVNW sy-vline 
WA_ESKN_STR-KBLNR sy-vline 
WA_ESKN_STR-KBLPOS sy-vline 
WA_ESKN_STR-DABRZ sy-vline 
WA_ESKN_STR-LSTAR sy-vline 
WA_ESKN_STR-PRZNR sy-vline 
WA_ESKN_STR-GRANT_NBR sy-vline 
WA_ESKN_STR-FM_SPLIT_BATCH sy-vline 
WA_ESKN_STR-FM_SPLIT_BEGRU sy-vline 
WA_ESKN_STR-BUDGET_PD sy-vline 
WA_ESKN_STR-FMFGUS_KEY sy-vline 
WA_ESKN_STR-_DATAAGING sy-vline 
WA_ESKN_STR-TCOBJNR sy-vline 
WA_ESKN_STR-DATEOFSERVICE sy-vline 
WA_ESKN_STR-NOTAXCORR sy-vline 
WA_ESKN_STR-DIFFOPTRATE sy-vline 
WA_ESKN_STR-HASDIFFOPTRATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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