ABAP Select data from SAP table J_3R_ALV_INCOM_INV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3R_ALV_INCOM_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 J_3R_ALV_INCOM_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 J_3R_ALV_INCOM_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_J_3R_ALV_INCOM_INV TYPE STANDARD TABLE OF J_3R_ALV_INCOM_INV,
      WA_J_3R_ALV_INCOM_INV TYPE J_3R_ALV_INCOM_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: <J_3R_ALV_INCOM_INV> TYPE J_3R_ALV_INCOM_INV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3R_ALV_INCOM_INV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3R_ALV_INCOM_INV
  INTO TABLE IT_J_3R_ALV_INCOM_INV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3R_ALV_INCOM_INV
*  INTO TABLE @DATA(IT_J_3R_ALV_INCOM_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_J_3R_ALV_INCOM_INV INDEX 1 INTO DATA(WA_J_3R_ALV_INCOM_INV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3R_ALV_INCOM_INV ASSIGNING <J_3R_ALV_INCOM_INV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3R_ALV_INCOM_INV>-BUKRS = 1.
<J_3R_ALV_INCOM_INV>-BELNR = 1.
<J_3R_ALV_INCOM_INV>-GJAHR = 1.
<J_3R_ALV_INCOM_INV>-BUZEI = 1.
<J_3R_ALV_INCOM_INV>-BUDAT = 1.

ENDLOOP.

LOOP AT IT_J_3R_ALV_INCOM_INV INTO WA_J_3R_ALV_INCOM_INV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3R_ALV_INCOM_INV-BLDAT, sy-vline,
  WA_J_3R_ALV_INCOM_INV-XBLNR, sy-vline,
  WA_J_3R_ALV_INCOM_INV-ZUONR, sy-vline,
  WA_J_3R_ALV_INCOM_INV-OUT_BUKRS, sy-vline,
  WA_J_3R_ALV_INCOM_INV-OUT_BELNR, sy-vline,
  WA_J_3R_ALV_INCOM_INV-OUT_GJAHR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3R_ALV_INCOM_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_J_3R_ALV_INCOM_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_J_3R_ALV_INCOM_INV INTO WA_J_3R_ALV_INCOM_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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3R_ALV_INCOM_INV-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3R_ALV_INCOM_INV-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3R_ALV_INCOM_INV-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3R_ALV_INCOM_INV-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OUT_BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3R_ALV_INCOM_INV-OUT_BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3R_ALV_INCOM_INV-OUT_BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field OUT_GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3R_ALV_INCOM_INV-OUT_GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3R_ALV_INCOM_INV-OUT_GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3R_ALV_INCOM_INV-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3R_ALV_INCOM_INV-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_3R_ALV_INCOM_INV-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3R_ALV_INCOM_INV-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_3R_ALV_INCOM_INV-ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3R_ALV_INCOM_INV-ERFME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_J_3R_ALV_INCOM_INV-DMBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3R_ALV_INCOM_INV-DMBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field WRBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_J_3R_ALV_INCOM_INV-WRBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3R_ALV_INCOM_INV-WRBTR.
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_J_3R_ALV_INCOM_INV_STR, 
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
XBLNR TYPE STRING,
ZUONR TYPE STRING,
OUT_BUKRS TYPE STRING,
OUT_BELNR TYPE STRING,
OUT_GJAHR TYPE STRING,
OUT_BUZEI TYPE STRING,
OUT_BUDAT TYPE STRING,
OUT_ZUONR TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
LIFNR TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
AD_PSTCD1 TYPE STRING,
LANDX TYPE STRING,
AD_CITY1 TYPE STRING,
AD_STREET TYPE STRING,
AD_HSNM1 TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
MAKTX_E TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
SGTXT TYPE STRING,
MWSKZ TYPE STRING,
DMBTR TYPE STRING,
WRBTR TYPE STRING,
WAERS TYPE STRING,
EXTCNUM TYPE STRING,
CNTDATE TYPE STRING,
OEXTCNUM TYPE STRING,
OCNTDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3R_ALV_INCOM_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_J_3R_ALV_INCOM_INV_STR-BUKRS sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-BELNR sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-GJAHR sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-BUZEI sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-BUDAT sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-BLDAT sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-XBLNR sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-ZUONR sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-OUT_BUKRS sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-OUT_BELNR sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-OUT_GJAHR sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-OUT_BUZEI sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-OUT_BUDAT sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-OUT_ZUONR sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-INCO1 sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-INCO2 sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-LIFNR sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-NAME1 sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-NAME2 sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-NAME3 sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-NAME4 sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-AD_PSTCD1 sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-LANDX sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-AD_CITY1 sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-AD_STREET sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-AD_HSNM1 sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-MATNR sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-MAKTX sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-MAKTX_E sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-ERFMG sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-ERFME sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-SGTXT sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-MWSKZ sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-DMBTR sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-WRBTR sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-WAERS sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-EXTCNUM sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-CNTDATE sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-OEXTCNUM sy-vline 
WA_J_3R_ALV_INCOM_INV_STR-OCNTDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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