ABAP Select data from SAP table IFW_UPDATE_INV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IFW_UPDATE_INV
*  INTO TABLE @DATA(IT_IFW_UPDATE_INV2).
*--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_IFW_UPDATE_INV INDEX 1 INTO DATA(WA_IFW_UPDATE_INV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IFW_UPDATE_INV>-ROOT_DOC_TYPE = 1.
<IFW_UPDATE_INV>-ROOT_DOC = 1.
<IFW_UPDATE_INV>-ROOT_DOC_ITEM = 1.
<IFW_UPDATE_INV>-INV_TYPE = 1.
<IFW_UPDATE_INV>-INV_NR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IFW_UPDATE_INV-INV_ITEM, sy-vline,
  WA_IFW_UPDATE_INV-BUKRS, sy-vline,
  WA_IFW_UPDATE_INV-EKORG, sy-vline,
  WA_IFW_UPDATE_INV-EKGRP, sy-vline,
  WA_IFW_UPDATE_INV-VKORG, sy-vline,
  WA_IFW_UPDATE_INV-VTWEG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IFW_UPDATE_INV 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_IFW_UPDATE_INV 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_IFW_UPDATE_INV INTO WA_IFW_UPDATE_INV.


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

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

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

*Conversion exit EXCRT, internal->external for field FX_RATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_IFW_UPDATE_INV-FX_RATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFW_UPDATE_INV-FX_RATE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IFW_UPDATE_INV-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFW_UPDATE_INV-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PRUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IFW_UPDATE_INV-PRUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFW_UPDATE_INV-PRUOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PRUOM_RD
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IFW_UPDATE_INV-PRUOM_RD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFW_UPDATE_INV-PRUOM_RD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IFW_UPDATE_INV-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFW_UPDATE_INV-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_IFW_UPDATE_INV_STR, 
ROOT_DOC_TYPE TYPE STRING,
ROOT_DOC TYPE STRING,
ROOT_DOC_ITEM TYPE STRING,
INV_TYPE TYPE STRING,
INV_NR TYPE STRING,
INV_ITEM TYPE STRING,
BUKRS TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
KUNAG TYPE STRING,
LIFNR TYPE STRING,
XBLNR TYPE STRING,
WL_STATUS TYPE STRING,
LAST_CALC TYPE STRING,
FKDAT TYPE STRING,
INV_DUE_DATE TYPE STRING,
PAY_DUE_DATE TYPE STRING,
BILL_TYPE TYPE STRING,
CANCELLED TYPE STRING,
PRED_INV_NR TYPE STRING,
PRED_INV_TYPE TYPE STRING,
OUTDATED TYPE STRING,
INV_CAT TYPE STRING,
PAIR_ITEM TYPE STRING,
ITEM_CANCELLED TYPE STRING,
REF_TYPE TYPE STRING,
REF_OBJ TYPE STRING,
NET_VAL TYPE STRING,
TAX_VAL TYPE STRING,
DOC_CUKY TYPE STRING,
FX_RATE TYPE STRING,
QUANTITY TYPE STRING,
MEINS TYPE STRING,
PR_CONDTYPE TYPE STRING,
PR_STATUS TYPE STRING,
PRICE TYPE STRING,
PRCUR TYPE STRING,
PRUNI TYPE STRING,
PRUOM TYPE STRING,
PR_START_DATE TYPE STRING,
PR_END_DATE TYPE STRING,
FX_START_DATE TYPE STRING,
FX_END_DATE TYPE STRING,
PRICE_RD TYPE STRING,
PRCUR_RD TYPE STRING,
PRUNI_RD TYPE STRING,
PRUOM_RD TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
INV_DUE_DATE_PRO TYPE STRING,
INV_DUE_DATE_FIN TYPE STRING,
PAY_DUE_DATE_PRO TYPE STRING,
PAY_DUE_DATE_FIN TYPE STRING,
TIMESTAMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IFW_UPDATE_INV_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_IFW_UPDATE_INV_STR-ROOT_DOC_TYPE sy-vline 
WA_IFW_UPDATE_INV_STR-ROOT_DOC sy-vline 
WA_IFW_UPDATE_INV_STR-ROOT_DOC_ITEM sy-vline 
WA_IFW_UPDATE_INV_STR-INV_TYPE sy-vline 
WA_IFW_UPDATE_INV_STR-INV_NR sy-vline 
WA_IFW_UPDATE_INV_STR-INV_ITEM sy-vline 
WA_IFW_UPDATE_INV_STR-BUKRS sy-vline 
WA_IFW_UPDATE_INV_STR-EKORG sy-vline 
WA_IFW_UPDATE_INV_STR-EKGRP sy-vline 
WA_IFW_UPDATE_INV_STR-VKORG sy-vline 
WA_IFW_UPDATE_INV_STR-VTWEG sy-vline 
WA_IFW_UPDATE_INV_STR-SPART sy-vline 
WA_IFW_UPDATE_INV_STR-KUNAG sy-vline 
WA_IFW_UPDATE_INV_STR-LIFNR sy-vline 
WA_IFW_UPDATE_INV_STR-XBLNR sy-vline 
WA_IFW_UPDATE_INV_STR-WL_STATUS sy-vline 
WA_IFW_UPDATE_INV_STR-LAST_CALC sy-vline 
WA_IFW_UPDATE_INV_STR-FKDAT sy-vline 
WA_IFW_UPDATE_INV_STR-INV_DUE_DATE sy-vline 
WA_IFW_UPDATE_INV_STR-PAY_DUE_DATE sy-vline 
WA_IFW_UPDATE_INV_STR-BILL_TYPE sy-vline 
WA_IFW_UPDATE_INV_STR-CANCELLED sy-vline 
WA_IFW_UPDATE_INV_STR-PRED_INV_NR sy-vline 
WA_IFW_UPDATE_INV_STR-PRED_INV_TYPE sy-vline 
WA_IFW_UPDATE_INV_STR-OUTDATED sy-vline 
WA_IFW_UPDATE_INV_STR-INV_CAT sy-vline 
WA_IFW_UPDATE_INV_STR-PAIR_ITEM sy-vline 
WA_IFW_UPDATE_INV_STR-ITEM_CANCELLED sy-vline 
WA_IFW_UPDATE_INV_STR-REF_TYPE sy-vline 
WA_IFW_UPDATE_INV_STR-REF_OBJ sy-vline 
WA_IFW_UPDATE_INV_STR-NET_VAL sy-vline 
WA_IFW_UPDATE_INV_STR-TAX_VAL sy-vline 
WA_IFW_UPDATE_INV_STR-DOC_CUKY sy-vline 
WA_IFW_UPDATE_INV_STR-FX_RATE sy-vline 
WA_IFW_UPDATE_INV_STR-QUANTITY sy-vline 
WA_IFW_UPDATE_INV_STR-MEINS sy-vline 
WA_IFW_UPDATE_INV_STR-PR_CONDTYPE sy-vline 
WA_IFW_UPDATE_INV_STR-PR_STATUS sy-vline 
WA_IFW_UPDATE_INV_STR-PRICE sy-vline 
WA_IFW_UPDATE_INV_STR-PRCUR sy-vline 
WA_IFW_UPDATE_INV_STR-PRUNI sy-vline 
WA_IFW_UPDATE_INV_STR-PRUOM sy-vline 
WA_IFW_UPDATE_INV_STR-PR_START_DATE sy-vline 
WA_IFW_UPDATE_INV_STR-PR_END_DATE sy-vline 
WA_IFW_UPDATE_INV_STR-FX_START_DATE sy-vline 
WA_IFW_UPDATE_INV_STR-FX_END_DATE sy-vline 
WA_IFW_UPDATE_INV_STR-PRICE_RD sy-vline 
WA_IFW_UPDATE_INV_STR-PRCUR_RD sy-vline 
WA_IFW_UPDATE_INV_STR-PRUNI_RD sy-vline 
WA_IFW_UPDATE_INV_STR-PRUOM_RD sy-vline 
WA_IFW_UPDATE_INV_STR-WERKS sy-vline 
WA_IFW_UPDATE_INV_STR-MATNR sy-vline 
WA_IFW_UPDATE_INV_STR-INV_DUE_DATE_PRO sy-vline 
WA_IFW_UPDATE_INV_STR-INV_DUE_DATE_FIN sy-vline 
WA_IFW_UPDATE_INV_STR-PAY_DUE_DATE_PRO sy-vline 
WA_IFW_UPDATE_INV_STR-PAY_DUE_DATE_FIN sy-vline 
WA_IFW_UPDATE_INV_STR-TIMESTAMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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