ABAP Select data from SAP table SINVT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SINVT
*  INTO TABLE @DATA(IT_SINVT2).
*--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_SINVT INDEX 1 INTO DATA(WA_SINVT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SINVT>-MANDT = 1.
<SINVT>-ZPSTI = 1.
<SINVT>-HOCHR = 1.
<SINVT>-SISTA = 1.
<SINVT>-BDSTI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SINVT-XISAP, sy-vline,
  WA_SINVT-IGSCH, sy-vline,
  WA_SINVT-PLVER, sy-vline,
  WA_SINVT-PLSPR, sy-vline,
  WA_SINVT-PLSPE, sy-vline,
  WA_SINVT-ZUFTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SINVT 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_SINVT 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_SINVT INTO WA_SINVT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_SINVT_STR, 
MANDT TYPE STRING,
ZPSTI TYPE STRING,
HOCHR TYPE STRING,
SISTA TYPE STRING,
BDSTI TYPE STRING,
XISAP TYPE STRING,
IGSCH TYPE STRING,
PLVER TYPE STRING,
PLSPR TYPE STRING,
PLSPE TYPE STRING,
ZUFTEXT TYPE STRING,
PLGES TYPE STRING,
AKVER TYPE STRING,
AKVER_GEZ TYPE STRING,
AKVER_GEB TYPE STRING,
AKSPR TYPE STRING,
AKSPE TYPE STRING,
AKSPE_GEZ TYPE STRING,
AKSPE_GEB TYPE STRING,
AKGES TYPE STRING,
AKGES_GEZ TYPE STRING,
AKGES_GEB TYPE STRING,
PREIS_ALT TYPE STRING,
PREIS_NEU TYPE STRING,
BUANF_ALT TYPE STRING,
BUANF_NEU TYPE STRING,
BUANF_DIF1 TYPE STRING,
BUANF_DIF2 TYPE STRING,
BUANF_DIF3 TYPE STRING,
PROZENT_NEU TYPE STRING,
PROZENT_ALT TYPE STRING,
XAKTU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SINVT_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_SINVT_STR-MANDT sy-vline 
WA_SINVT_STR-ZPSTI sy-vline 
WA_SINVT_STR-HOCHR sy-vline 
WA_SINVT_STR-SISTA sy-vline 
WA_SINVT_STR-BDSTI sy-vline 
WA_SINVT_STR-XISAP sy-vline 
WA_SINVT_STR-IGSCH sy-vline 
WA_SINVT_STR-PLVER sy-vline 
WA_SINVT_STR-PLSPR sy-vline 
WA_SINVT_STR-PLSPE sy-vline 
WA_SINVT_STR-ZUFTEXT sy-vline 
WA_SINVT_STR-PLGES sy-vline 
WA_SINVT_STR-AKVER sy-vline 
WA_SINVT_STR-AKVER_GEZ sy-vline 
WA_SINVT_STR-AKVER_GEB sy-vline 
WA_SINVT_STR-AKSPR sy-vline 
WA_SINVT_STR-AKSPE sy-vline 
WA_SINVT_STR-AKSPE_GEZ sy-vline 
WA_SINVT_STR-AKSPE_GEB sy-vline 
WA_SINVT_STR-AKGES sy-vline 
WA_SINVT_STR-AKGES_GEZ sy-vline 
WA_SINVT_STR-AKGES_GEB sy-vline 
WA_SINVT_STR-PREIS_ALT sy-vline 
WA_SINVT_STR-PREIS_NEU sy-vline 
WA_SINVT_STR-BUANF_ALT sy-vline 
WA_SINVT_STR-BUANF_NEU sy-vline 
WA_SINVT_STR-BUANF_DIF1 sy-vline 
WA_SINVT_STR-BUANF_DIF2 sy-vline 
WA_SINVT_STR-BUANF_DIF3 sy-vline 
WA_SINVT_STR-PROZENT_NEU sy-vline 
WA_SINVT_STR-PROZENT_ALT sy-vline 
WA_SINVT_STR-XAKTU sy-vline      INTO ld_text SEPARATED BY SPACE.

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