ABAP Select data from SAP table S990 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP S990 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 S990. 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 S990 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_S990 TYPE STANDARD TABLE OF S990,
      WA_S990 TYPE S990,
      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: <S990> TYPE S990.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_S990.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM S990
  INTO TABLE IT_S990.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM S990
*  INTO TABLE @DATA(IT_S9902).
*--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_S990 INDEX 1 INTO DATA(WA_S9902).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_S990 ASSIGNING <S990>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<S990>-MANDT = 1.
<S990>-SSOUR = 1.
<S990>-VRSIO = 1.
<S990>-SPMON = 1.
<S990>-SPTAG = 1.

ENDLOOP.

LOOP AT IT_S990 INTO WA_S990.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_S990-SPWOC, sy-vline,
  WA_S990-SPBUP, sy-vline,
  WA_S990-HIEZU01, sy-vline,
  WA_S990-HIEZU02, sy-vline,
  WA_S990-KUNNR, sy-vline,
  WA_S990-VKORG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_S990 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_S990 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_S990 INTO WA_S990.


*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 PERI, internal->external for field SPMON
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_S990-SPMON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_S990-SPMON.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI, internal->external for field SPWOC
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_S990-SPWOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_S990-SPWOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI, internal->external for field SPBUP
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_S990-SPBUP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_S990-SPBUP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HIEZU01
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_S990-HIEZU01
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_S990-HIEZU01.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HIEZU02
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_S990-HIEZU02
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_S990-HIEZU02.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_S990-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_S990-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_S990-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_S990-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BASME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_S990-BASME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_S990-BASME.
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_S990_STR, 
MANDT TYPE STRING,
SSOUR TYPE STRING,
VRSIO TYPE STRING,
SPMON TYPE STRING,
SPTAG TYPE STRING,
SPWOC TYPE STRING,
SPBUP TYPE STRING,
HIEZU01 TYPE STRING,
HIEZU02 TYPE STRING,
KUNNR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
MATNR TYPE STRING,
PERIV TYPE STRING,
VWDAT TYPE STRING,
STWAE TYPE STRING,
BASME TYPE STRING,
AENETWR TYPE STRING,
UMNETWR TYPE STRING,
OAUWE TYPE STRING,
RENETWR TYPE STRING,
GUNETWR TYPE STRING,
AEMENGE TYPE STRING,
UMMENGE TYPE STRING,
OAUME TYPE STRING,
REMENGE TYPE STRING,
GUMENGE TYPE STRING,
ANZAUPOS TYPE STRING,
ANZREPOS TYPE STRING,
AEWAVWR TYPE STRING,
UMWAVWR TYPE STRING,
REWAVWR TYPE STRING,
GUWAVWR TYPE STRING,
AEKZWI1 TYPE STRING,
UMKZWI1 TYPE STRING,
REKZWI1 TYPE STRING,
GUKZWI1 TYPE STRING,
AEKZWI2 TYPE STRING,
UMKZWI2 TYPE STRING,
REKZWI2 TYPE STRING,
GUKZWI2 TYPE STRING,
AEKZWI3 TYPE STRING,
UMKZWI3 TYPE STRING,
REKZWI3 TYPE STRING,
GUKZWI3 TYPE STRING,
AEKZWI4 TYPE STRING,
UMKZWI4 TYPE STRING,
REKZWI4 TYPE STRING,
GUKZWI4 TYPE STRING,
AEKZWI5 TYPE STRING,
UMKZWI5 TYPE STRING,
REKZWI5 TYPE STRING,
GUKZWI5 TYPE STRING,
AEKZWI6 TYPE STRING,
UMKZWI6 TYPE STRING,
REKZWI6 TYPE STRING,
GUKZWI6 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_S990_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_S990_STR-MANDT sy-vline 
WA_S990_STR-SSOUR sy-vline 
WA_S990_STR-VRSIO sy-vline 
WA_S990_STR-SPMON sy-vline 
WA_S990_STR-SPTAG sy-vline 
WA_S990_STR-SPWOC sy-vline 
WA_S990_STR-SPBUP sy-vline 
WA_S990_STR-HIEZU01 sy-vline 
WA_S990_STR-HIEZU02 sy-vline 
WA_S990_STR-KUNNR sy-vline 
WA_S990_STR-VKORG sy-vline 
WA_S990_STR-VTWEG sy-vline 
WA_S990_STR-SPART sy-vline 
WA_S990_STR-MATNR sy-vline 
WA_S990_STR-PERIV sy-vline 
WA_S990_STR-VWDAT sy-vline 
WA_S990_STR-STWAE sy-vline 
WA_S990_STR-BASME sy-vline 
WA_S990_STR-AENETWR sy-vline 
WA_S990_STR-UMNETWR sy-vline 
WA_S990_STR-OAUWE sy-vline 
WA_S990_STR-RENETWR sy-vline 
WA_S990_STR-GUNETWR sy-vline 
WA_S990_STR-AEMENGE sy-vline 
WA_S990_STR-UMMENGE sy-vline 
WA_S990_STR-OAUME sy-vline 
WA_S990_STR-REMENGE sy-vline 
WA_S990_STR-GUMENGE sy-vline 
WA_S990_STR-ANZAUPOS sy-vline 
WA_S990_STR-ANZREPOS sy-vline 
WA_S990_STR-AEWAVWR sy-vline 
WA_S990_STR-UMWAVWR sy-vline 
WA_S990_STR-REWAVWR sy-vline 
WA_S990_STR-GUWAVWR sy-vline 
WA_S990_STR-AEKZWI1 sy-vline 
WA_S990_STR-UMKZWI1 sy-vline 
WA_S990_STR-REKZWI1 sy-vline 
WA_S990_STR-GUKZWI1 sy-vline 
WA_S990_STR-AEKZWI2 sy-vline 
WA_S990_STR-UMKZWI2 sy-vline 
WA_S990_STR-REKZWI2 sy-vline 
WA_S990_STR-GUKZWI2 sy-vline 
WA_S990_STR-AEKZWI3 sy-vline 
WA_S990_STR-UMKZWI3 sy-vline 
WA_S990_STR-REKZWI3 sy-vline 
WA_S990_STR-GUKZWI3 sy-vline 
WA_S990_STR-AEKZWI4 sy-vline 
WA_S990_STR-UMKZWI4 sy-vline 
WA_S990_STR-REKZWI4 sy-vline 
WA_S990_STR-GUKZWI4 sy-vline 
WA_S990_STR-AEKZWI5 sy-vline 
WA_S990_STR-UMKZWI5 sy-vline 
WA_S990_STR-REKZWI5 sy-vline 
WA_S990_STR-GUKZWI5 sy-vline 
WA_S990_STR-AEKZWI6 sy-vline 
WA_S990_STR-UMKZWI6 sy-vline 
WA_S990_STR-REKZWI6 sy-vline 
WA_S990_STR-GUKZWI6 sy-vline      INTO ld_text SEPARATED BY SPACE.

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