ABAP Select data from SAP table ISJP_S_INV_ITEM_LIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISJP_S_INV_ITEM_LIST
*  INTO TABLE @DATA(IT_ISJP_S_INV_ITEM_LIST2).
*--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_ISJP_S_INV_ITEM_LIST INDEX 1 INTO DATA(WA_ISJP_S_INV_ITEM_LIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISJP_S_INV_ITEM_LIST>-GENERATED_ID = 1.
<ISJP_S_INV_ITEM_LIST>-BUKRS = 1.
<ISJP_S_INV_ITEM_LIST>-GJAHR = 1.
<ISJP_S_INV_ITEM_LIST>-BELNR = 1.
<ISJP_S_INV_ITEM_LIST>-BUZEI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISJP_S_INV_ITEM_LIST-BLART, sy-vline,
  WA_ISJP_S_INV_ITEM_LIST-KOART, sy-vline,
  WA_ISJP_S_INV_ITEM_LIST-BLDAT, sy-vline,
  WA_ISJP_S_INV_ITEM_LIST-BUDAT, sy-vline,
  WA_ISJP_S_INV_ITEM_LIST-ZFBDT, sy-vline,
  WA_ISJP_S_INV_ITEM_LIST-XBLNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISJP_S_INV_ITEM_LIST 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_ISJP_S_INV_ITEM_LIST 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_ISJP_S_INV_ITEM_LIST INTO WA_ISJP_S_INV_ITEM_LIST.


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

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

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

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

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

*Conversion exit AC152, internal->external for field NET_VALUE
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_ISJP_S_INV_ITEM_LIST-NET_VALUE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISJP_S_INV_ITEM_LIST-NET_VALUE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field NET_VALUE_UNIT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_ISJP_S_INV_ITEM_LIST-NET_VALUE_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISJP_S_INV_ITEM_LIST-NET_VALUE_UNIT.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field INVSUMRECIP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISJP_S_INV_ITEM_LIST-INVSUMRECIP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISJP_S_INV_ITEM_LIST-INVSUMRECIP.
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_ISJP_S_INV_ITEM_LIST_STR, 
GENERATED_ID TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
BLART TYPE STRING,
KOART TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
ZFBDT TYPE STRING,
XBLNR TYPE STRING,
AWTYP TYPE STRING,
AWKEY TYPE STRING,
VBELN TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
FKIMG TYPE STRING,
MEINS TYPE STRING,
NET_VALUE TYPE STRING,
NET_VALUE_UNIT TYPE STRING,
INV_CURRENCY TYPE STRING,
FBUDA TYPE STRING,
AUGDT TYPE STRING,
AUGGJ TYPE STRING,
AUGBL TYPE STRING,
INVSUMPAYER TYPE STRING,
MINR TYPE STRING,
INVSUMRECIP TYPE STRING,
CLOSDATE TYPE STRING,
NETDT TYPE STRING,
GRUNIT TYPE STRING,
NOTINCL TYPE STRING,
MIBLOCK TYPE STRING,
INVSEP TYPE STRING,
INVSUMREL TYPE STRING,
UPDSTAT TYPE STRING,
MAT_ITEM_COUNTER TYPE STRING,
EDIT_ICON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISJP_S_INV_ITEM_LIST_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_ISJP_S_INV_ITEM_LIST_STR-GENERATED_ID sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-BUKRS sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-GJAHR sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-BELNR sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-BUZEI sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-BLART sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-KOART sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-BLDAT sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-BUDAT sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-ZFBDT sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-XBLNR sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-AWTYP sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-AWKEY sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-VBELN sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-MATNR sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-MAKTX sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-FKIMG sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-MEINS sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-NET_VALUE sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-NET_VALUE_UNIT sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-INV_CURRENCY sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-FBUDA sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-AUGDT sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-AUGGJ sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-AUGBL sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-INVSUMPAYER sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-MINR sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-INVSUMRECIP sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-CLOSDATE sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-NETDT sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-GRUNIT sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-NOTINCL sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-MIBLOCK sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-INVSEP sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-INVSUMREL sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-UPDSTAT sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-MAT_ITEM_COUNTER sy-vline 
WA_ISJP_S_INV_ITEM_LIST_STR-EDIT_ICON sy-vline      INTO ld_text SEPARATED BY SPACE.

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