ABAP Select data from SAP table ILOAW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ILOAW
*  INTO TABLE @DATA(IT_ILOAW2).
*--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_ILOAW INDEX 1 INTO DATA(WA_ILOAW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ILOAW>-TPLNR = 1.
<ILOAW>-ABCKZ = 1.
<ILOAW>-EQFNR = 1.
<ILOAW>-SWERK = 1.
<ILOAW>-STORT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ILOAW-MSGRP, sy-vline,
  WA_ILOAW-BEBER, sy-vline,
  WA_ILOAW-CR_OBJTY, sy-vline,
  WA_ILOAW-PPSID, sy-vline,
  WA_ILOAW-PROID, sy-vline,
  WA_ILOAW-DAUFN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ILOAW 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_ILOAW 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_ILOAW INTO WA_ILOAW.


*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 TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_ILOAW-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ILOAW-TPLNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ADRNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ILOAW-ADRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ILOAW-ADRNR.
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_ILOAW_STR, 
TPLNR TYPE STRING,
ABCKZ TYPE STRING,
EQFNR TYPE STRING,
SWERK TYPE STRING,
STORT TYPE STRING,
MSGRP TYPE STRING,
BEBER TYPE STRING,
CR_OBJTY TYPE STRING,
PPSID TYPE STRING,
PROID TYPE STRING,
DAUFN TYPE STRING,
KOSTL TYPE STRING,
ANLNR TYPE STRING,
ANLUN TYPE STRING,
IAUFNR TYPE STRING,
IKOKRS TYPE STRING,
IBUKRS TYPE STRING,
IGSBER TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
ADRNR TYPE STRING,
OWNER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ILOAW_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_ILOAW_STR-TPLNR sy-vline 
WA_ILOAW_STR-ABCKZ sy-vline 
WA_ILOAW_STR-EQFNR sy-vline 
WA_ILOAW_STR-SWERK sy-vline 
WA_ILOAW_STR-STORT sy-vline 
WA_ILOAW_STR-MSGRP sy-vline 
WA_ILOAW_STR-BEBER sy-vline 
WA_ILOAW_STR-CR_OBJTY sy-vline 
WA_ILOAW_STR-PPSID sy-vline 
WA_ILOAW_STR-PROID sy-vline 
WA_ILOAW_STR-DAUFN sy-vline 
WA_ILOAW_STR-KOSTL sy-vline 
WA_ILOAW_STR-ANLNR sy-vline 
WA_ILOAW_STR-ANLUN sy-vline 
WA_ILOAW_STR-IAUFNR sy-vline 
WA_ILOAW_STR-IKOKRS sy-vline 
WA_ILOAW_STR-IBUKRS sy-vline 
WA_ILOAW_STR-IGSBER sy-vline 
WA_ILOAW_STR-VKORG sy-vline 
WA_ILOAW_STR-VTWEG sy-vline 
WA_ILOAW_STR-SPART sy-vline 
WA_ILOAW_STR-ADRNR sy-vline 
WA_ILOAW_STR-OWNER sy-vline      INTO ld_text SEPARATED BY SPACE.

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