ABAP Select data from SAP table SEKLA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SEKLA
*  INTO TABLE @DATA(IT_SEKLA2).
*--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_SEKLA INDEX 1 INTO DATA(WA_SEKLA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SEKLA>-EBELN = 1.
<SEKLA>-EBELP = 1.
<SEKLA>-ETENS = 1.
<SEKLA>-LFBJA = 1.
<SEKLA>-LFBNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SEKLA-LFPOS, sy-vline,
  WA_SEKLA-LAMNG, sy-vline,
  WA_SEKLA-LWMNG, sy-vline,
  WA_SEKLA-LWSBS, sy-vline,
  WA_SEKLA-LWSBB, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_SEKLA 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_SEKLA 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_SEKLA INTO WA_SEKLA.


*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_SEKLA-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SEKLA-EBELN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field LFBNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SEKLA-LFBNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SEKLA-LFBNR.
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_SEKLA_STR, 
EBELN TYPE STRING,
EBELP TYPE STRING,
ETENS TYPE STRING,
LFBJA TYPE STRING,
LFBNR TYPE STRING,
LFPOS TYPE STRING,
LAMNG TYPE STRING,
LWMNG TYPE STRING,
LWSBS TYPE STRING,
LWSBB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SEKLA_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_SEKLA_STR-EBELN sy-vline 
WA_SEKLA_STR-EBELP sy-vline 
WA_SEKLA_STR-ETENS sy-vline 
WA_SEKLA_STR-LFBJA sy-vline 
WA_SEKLA_STR-LFBNR sy-vline 
WA_SEKLA_STR-LFPOS sy-vline 
WA_SEKLA_STR-LAMNG sy-vline 
WA_SEKLA_STR-LWMNG sy-vline 
WA_SEKLA_STR-LWSBS sy-vline 
WA_SEKLA_STR-LWSBB sy-vline      INTO ld_text SEPARATED BY SPACE.

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