ABAP Select data from SAP table LICOM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LICOM
*  INTO TABLE @DATA(IT_LICOM2).
*--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_LICOM INDEX 1 INTO DATA(WA_LICOM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LICOM>-MATNR = 1.
<LICOM>-VSTEL = 1.
<LICOM>-VKORG = 1.
<LICOM>-VTWEG = 1.
<LICOM>-SPART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LICOM-VKGRP, sy-vline,
  WA_LICOM-LFART, sy-vline,
  WA_LICOM-KUNNR, sy-vline,
  WA_LICOM-KUNAG, sy-vline,
  WA_LICOM-LFDAT, sy-vline,
  WA_LICOM-LFDAT_BIS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LICOM 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_LICOM 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_LICOM INTO WA_LICOM.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_LICOM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LICOM-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field KUNDE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LICOM-KUNDE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LICOM-KUNDE.
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_LICOM_STR, 
MATNR TYPE STRING,
VSTEL TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
VKGRP TYPE STRING,
LFART TYPE STRING,
KUNNR TYPE STRING,
KUNAG TYPE STRING,
LFDAT TYPE STRING,
LFDAT_BIS TYPE STRING,
ZUART TYPE STRING,
MANDT TYPE STRING,
VBELN TYPE STRING,
VBELN_BIS TYPE STRING,
VBOFF TYPE STRING,
VBIND TYPE STRING,
VBALL TYPE STRING,
NAME_DAZU TYPE STRING,
PARVW TYPE STRING,
KUNDE TYPE STRING,
KOPF_DAZU TYPE STRING,
POSNR TYPE STRING,
ERNAM TYPE STRING,
STAT_DAZU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LICOM_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_LICOM_STR-MATNR sy-vline 
WA_LICOM_STR-VSTEL sy-vline 
WA_LICOM_STR-VKORG sy-vline 
WA_LICOM_STR-VTWEG sy-vline 
WA_LICOM_STR-SPART sy-vline 
WA_LICOM_STR-VKGRP sy-vline 
WA_LICOM_STR-LFART sy-vline 
WA_LICOM_STR-KUNNR sy-vline 
WA_LICOM_STR-KUNAG sy-vline 
WA_LICOM_STR-LFDAT sy-vline 
WA_LICOM_STR-LFDAT_BIS sy-vline 
WA_LICOM_STR-ZUART sy-vline 
WA_LICOM_STR-MANDT sy-vline 
WA_LICOM_STR-VBELN sy-vline 
WA_LICOM_STR-VBELN_BIS sy-vline 
WA_LICOM_STR-VBOFF sy-vline 
WA_LICOM_STR-VBIND sy-vline 
WA_LICOM_STR-VBALL sy-vline 
WA_LICOM_STR-NAME_DAZU sy-vline 
WA_LICOM_STR-PARVW sy-vline 
WA_LICOM_STR-KUNDE sy-vline 
WA_LICOM_STR-KOPF_DAZU sy-vline 
WA_LICOM_STR-POSNR sy-vline 
WA_LICOM_STR-ERNAM sy-vline 
WA_LICOM_STR-STAT_DAZU sy-vline      INTO ld_text SEPARATED BY SPACE.

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