ABAP Select data from SAP table SEKLB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SEKLB
*  INTO TABLE @DATA(IT_SEKLB2).
*--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_SEKLB INDEX 1 INTO DATA(WA_SEKLB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SEKLB>-ZEILE = 1.
<SEKLB>-ZEILO = 1.
<SEKLB>-EBELN = 1.
<SEKLB>-EBELP = 1.
<SEKLB>-LFBJA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SEKLB-LFBNR, sy-vline,
  WA_SEKLB-LFPOS, sy-vline,
  WA_SEKLB-CURTP, sy-vline,
  WA_SEKLB-MATNR, sy-vline,
  WA_SEKLB-WERKS, sy-vline,
  WA_SEKLB-SHKZG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SEKLB 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_SEKLB 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_SEKLB INTO WA_SEKLB.


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

*Conversion exit GJAHR, internal->external for field LFBJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_SEKLB-LFBJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SEKLB-LFBJA.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_SEKLB-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SEKLB-MATNR.
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_SEKLB_STR, 
ZEILE TYPE STRING,
ZEILO TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
LFBJA TYPE STRING,
LFBNR TYPE STRING,
LFPOS TYPE STRING,
CURTP TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
SHKZG TYPE STRING,
ERFMG TYPE STRING,
DMBTR TYPE STRING,
WAERS TYPE STRING,
ZEILX TYPE STRING,
VWERT TYPE STRING,
XDBUP TYPE STRING,
WRBTR TYPE STRING,
UMWAE TYPE STRING,
EXALT TYPE STRING,
BWTAR TYPE STRING,
BYPRO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SEKLB_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_SEKLB_STR-ZEILE sy-vline 
WA_SEKLB_STR-ZEILO sy-vline 
WA_SEKLB_STR-EBELN sy-vline 
WA_SEKLB_STR-EBELP sy-vline 
WA_SEKLB_STR-LFBJA sy-vline 
WA_SEKLB_STR-LFBNR sy-vline 
WA_SEKLB_STR-LFPOS sy-vline 
WA_SEKLB_STR-CURTP sy-vline 
WA_SEKLB_STR-MATNR sy-vline 
WA_SEKLB_STR-WERKS sy-vline 
WA_SEKLB_STR-SHKZG sy-vline 
WA_SEKLB_STR-ERFMG sy-vline 
WA_SEKLB_STR-DMBTR sy-vline 
WA_SEKLB_STR-WAERS sy-vline 
WA_SEKLB_STR-ZEILX sy-vline 
WA_SEKLB_STR-VWERT sy-vline 
WA_SEKLB_STR-XDBUP sy-vline 
WA_SEKLB_STR-WRBTR sy-vline 
WA_SEKLB_STR-UMWAE sy-vline 
WA_SEKLB_STR-EXALT sy-vline 
WA_SEKLB_STR-BWTAR sy-vline 
WA_SEKLB_STR-BYPRO sy-vline      INTO ld_text SEPARATED BY SPACE.

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