ABAP Select data from SAP table /KYK/SLS_GENDOC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /KYK/SLS_GENDOC 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 /KYK/SLS_GENDOC. 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 /KYK/SLS_GENDOC 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_/KYK/SLS_GENDOC TYPE STANDARD TABLE OF /KYK/SLS_GENDOC,
      WA_/KYK/SLS_GENDOC TYPE /KYK/SLS_GENDOC,
      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: </KYK/SLS_GENDOC> TYPE /KYK/SLS_GENDOC.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /KYK/SLS_GENDOC
  INTO TABLE IT_/KYK/SLS_GENDOC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /KYK/SLS_GENDOC
*  INTO TABLE @DATA(IT_/KYK/SLS_GENDOC2).
*--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_/KYK/SLS_GENDOC INDEX 1 INTO DATA(WA_/KYK/SLS_GENDOC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/KYK/SLS_GENDOC ASSIGNING </KYK/SLS_GENDOC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</KYK/SLS_GENDOC>-VBELN = 1.
</KYK/SLS_GENDOC>-TRVOG = 1.
</KYK/SLS_GENDOC>-TRVOGT = 1.
</KYK/SLS_GENDOC>-AUART = 1.
</KYK/SLS_GENDOC>-AUARTT = 1.

ENDLOOP.

LOOP AT IT_/KYK/SLS_GENDOC INTO WA_/KYK/SLS_GENDOC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/KYK/SLS_GENDOC-KUNNR, sy-vline,
  WA_/KYK/SLS_GENDOC-ERDAT, sy-vline,
  WA_/KYK/SLS_GENDOC-ERZET, sy-vline,
  WA_/KYK/SLS_GENDOC-AUDAT, sy-vline,
  WA_/KYK/SLS_GENDOC-BSTKD, sy-vline,
  WA_/KYK/SLS_GENDOC-ZPAVW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/KYK/SLS_GENDOC 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_/KYK/SLS_GENDOC 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_/KYK/SLS_GENDOC INTO WA_/KYK/SLS_GENDOC.


*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 VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/SLS_GENDOC-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/SLS_GENDOC-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AUART, internal->external for field AUART
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/SLS_GENDOC-AUART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/SLS_GENDOC-AUART.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit PARVW, internal->external for field ZPAVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/SLS_GENDOC-ZPAVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/SLS_GENDOC-ZPAVW.
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_/KYK/SLS_GENDOC_STR, 
VBELN TYPE STRING,
TRVOG TYPE STRING,
TRVOGT TYPE STRING,
AUART TYPE STRING,
AUARTT TYPE STRING,
KUNNR TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
AUDAT TYPE STRING,
BSTKD TYPE STRING,
ZPAVW TYPE STRING,
ZPERS TYPE STRING,
ERNAM TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
VKBUR TYPE STRING,
VKGRP TYPE STRING,
WAERK TYPE STRING,
NETWR TYPE STRING,
AWAHR TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/KYK/SLS_GENDOC_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_/KYK/SLS_GENDOC_STR-VBELN sy-vline 
WA_/KYK/SLS_GENDOC_STR-TRVOG sy-vline 
WA_/KYK/SLS_GENDOC_STR-TRVOGT sy-vline 
WA_/KYK/SLS_GENDOC_STR-AUART sy-vline 
WA_/KYK/SLS_GENDOC_STR-AUARTT sy-vline 
WA_/KYK/SLS_GENDOC_STR-KUNNR sy-vline 
WA_/KYK/SLS_GENDOC_STR-ERDAT sy-vline 
WA_/KYK/SLS_GENDOC_STR-ERZET sy-vline 
WA_/KYK/SLS_GENDOC_STR-AUDAT sy-vline 
WA_/KYK/SLS_GENDOC_STR-BSTKD sy-vline 
WA_/KYK/SLS_GENDOC_STR-ZPAVW sy-vline 
WA_/KYK/SLS_GENDOC_STR-ZPERS sy-vline 
WA_/KYK/SLS_GENDOC_STR-ERNAM sy-vline 
WA_/KYK/SLS_GENDOC_STR-VKORG sy-vline 
WA_/KYK/SLS_GENDOC_STR-VTWEG sy-vline 
WA_/KYK/SLS_GENDOC_STR-SPART sy-vline 
WA_/KYK/SLS_GENDOC_STR-VKBUR sy-vline 
WA_/KYK/SLS_GENDOC_STR-VKGRP sy-vline 
WA_/KYK/SLS_GENDOC_STR-WAERK sy-vline 
WA_/KYK/SLS_GENDOC_STR-NETWR sy-vline 
WA_/KYK/SLS_GENDOC_STR-AWAHR sy-vline 
WA_/KYK/SLS_GENDOC_STR-DATAB sy-vline 
WA_/KYK/SLS_GENDOC_STR-DATBI sy-vline      INTO ld_text SEPARATED BY SPACE.

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