ABAP Select data from SAP table SI_INVOICE_LEVEL1R_2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SI_INVOICE_LEVEL1R_2 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 SI_INVOICE_LEVEL1R_2. 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 SI_INVOICE_LEVEL1R_2 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_SI_INVOICE_LEVEL1R_2 TYPE STANDARD TABLE OF SI_INVOICE_LEVEL1R_2,
      WA_SI_INVOICE_LEVEL1R_2 TYPE SI_INVOICE_LEVEL1R_2,
      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: <SI_INVOICE_LEVEL1R_2> TYPE SI_INVOICE_LEVEL1R_2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SI_INVOICE_LEVEL1R_2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SI_INVOICE_LEVEL1R_2
  INTO TABLE IT_SI_INVOICE_LEVEL1R_2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SI_INVOICE_LEVEL1R_2
*  INTO TABLE @DATA(IT_SI_INVOICE_LEVEL1R_22).
*--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_SI_INVOICE_LEVEL1R_2 INDEX 1 INTO DATA(WA_SI_INVOICE_LEVEL1R_22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SI_INVOICE_LEVEL1R_2 ASSIGNING <SI_INVOICE_LEVEL1R_2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SI_INVOICE_LEVEL1R_2>-TOTAL_AMNT_USE = 1.
<SI_INVOICE_LEVEL1R_2>-ZLSCH = 1.
<SI_INVOICE_LEVEL1R_2>-NRZAS = 1.
<SI_INVOICE_LEVEL1R_2>-PORTION = 1.
<SI_INVOICE_LEVEL1R_2>-ABRVORG = 1.

ENDLOOP.

LOOP AT IT_SI_INVOICE_LEVEL1R_2 INTO WA_SI_INVOICE_LEVEL1R_2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SI_INVOICE_LEVEL1R_2-FORMKEY, sy-vline,
  WA_SI_INVOICE_LEVEL1R_2-TOBRELEASD, sy-vline,
  WA_SI_INVOICE_LEVEL1R_2-SIMULATED, sy-vline,
  WA_SI_INVOICE_LEVEL1R_2-INVOICED, sy-vline,
  WA_SI_INVOICE_LEVEL1R_2-ABWVK, sy-vline,
  WA_SI_INVOICE_LEVEL1R_2-ERGRD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SI_INVOICE_LEVEL1R_2 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_SI_INVOICE_LEVEL1R_2 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_SI_INVOICE_LEVEL1R_2 INTO WA_SI_INVOICE_LEVEL1R_2.


*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 NRZAS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SI_INVOICE_LEVEL1R_2-NRZAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SI_INVOICE_LEVEL1R_2-NRZAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABWVK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SI_INVOICE_LEVEL1R_2-ABWVK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SI_INVOICE_LEVEL1R_2-ABWVK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_SI_INVOICE_LEVEL1R_2-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SI_INVOICE_LEVEL1R_2-LANGU.
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_SI_INVOICE_LEVEL1R_2_STR, 
TOTAL_AMNT_USE TYPE STRING,
ZLSCH TYPE STRING,
NRZAS TYPE STRING,
PORTION TYPE STRING,
ABRVORG TYPE STRING,
FORMKEY TYPE STRING,
TOBRELEASD TYPE STRING,
SIMULATED TYPE STRING,
INVOICED TYPE STRING,
ABWVK TYPE STRING,
ERGRD TYPE STRING,
LANGU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SI_INVOICE_LEVEL1R_2_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_SI_INVOICE_LEVEL1R_2_STR-TOTAL_AMNT_USE sy-vline 
WA_SI_INVOICE_LEVEL1R_2_STR-ZLSCH sy-vline 
WA_SI_INVOICE_LEVEL1R_2_STR-NRZAS sy-vline 
WA_SI_INVOICE_LEVEL1R_2_STR-PORTION sy-vline 
WA_SI_INVOICE_LEVEL1R_2_STR-ABRVORG sy-vline 
WA_SI_INVOICE_LEVEL1R_2_STR-FORMKEY sy-vline 
WA_SI_INVOICE_LEVEL1R_2_STR-TOBRELEASD sy-vline 
WA_SI_INVOICE_LEVEL1R_2_STR-SIMULATED sy-vline 
WA_SI_INVOICE_LEVEL1R_2_STR-INVOICED sy-vline 
WA_SI_INVOICE_LEVEL1R_2_STR-ABWVK sy-vline 
WA_SI_INVOICE_LEVEL1R_2_STR-ERGRD sy-vline 
WA_SI_INVOICE_LEVEL1R_2_STR-LANGU sy-vline      INTO ld_text SEPARATED BY SPACE.

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