ABAP Select data from SAP table SPACK_SCREEN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SPACK_SCREEN
*  INTO TABLE @DATA(IT_SPACK_SCREEN2).
*--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_SPACK_SCREEN INDEX 1 INTO DATA(WA_SPACK_SCREEN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SPACK_SCREEN>-PERNR = 1.
<SPACK_SCREEN>-EFFDA = 1.
<SPACK_SCREEN>-EE_NAME = 1.
<SPACK_SCREEN>-CURRENCY = 1.
<SPACK_SCREEN>-CARVL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SPACK_SCREEN-BSEXP, sy-vline,
  WA_SPACK_SCREEN-TAXYE, sy-vline,
  WA_SPACK_SCREEN-TAXCR, sy-vline,
  WA_SPACK_SCREEN-BUSKM, sy-vline,
  WA_SPACK_SCREEN-TOTKM, sy-vline,
  WA_SPACK_SCREEN-CARAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SPACK_SCREEN 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_SPACK_SCREEN 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_SPACK_SCREEN INTO WA_SPACK_SCREEN.


*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_SPACK_SCREEN_STR, 
PERNR TYPE STRING,
EFFDA TYPE STRING,
EE_NAME TYPE STRING,
CURRENCY TYPE STRING,
CARVL TYPE STRING,
BSEXP TYPE STRING,
TAXYE TYPE STRING,
TAXCR TYPE STRING,
BUSKM TYPE STRING,
TOTKM TYPE STRING,
CARAL TYPE STRING,
CURR1 TYPE STRING,
CURR2 TYPE STRING,
CURR3 TYPE STRING,
CURR4 TYPE STRING,
CURR5 TYPE STRING,
OLDTC TYPE STRING,
NEWTC TYPE STRING,
EDIT_TITLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SPACK_SCREEN_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_SPACK_SCREEN_STR-PERNR sy-vline 
WA_SPACK_SCREEN_STR-EFFDA sy-vline 
WA_SPACK_SCREEN_STR-EE_NAME sy-vline 
WA_SPACK_SCREEN_STR-CURRENCY sy-vline 
WA_SPACK_SCREEN_STR-CARVL sy-vline 
WA_SPACK_SCREEN_STR-BSEXP sy-vline 
WA_SPACK_SCREEN_STR-TAXYE sy-vline 
WA_SPACK_SCREEN_STR-TAXCR sy-vline 
WA_SPACK_SCREEN_STR-BUSKM sy-vline 
WA_SPACK_SCREEN_STR-TOTKM sy-vline 
WA_SPACK_SCREEN_STR-CARAL sy-vline 
WA_SPACK_SCREEN_STR-CURR1 sy-vline 
WA_SPACK_SCREEN_STR-CURR2 sy-vline 
WA_SPACK_SCREEN_STR-CURR3 sy-vline 
WA_SPACK_SCREEN_STR-CURR4 sy-vline 
WA_SPACK_SCREEN_STR-CURR5 sy-vline 
WA_SPACK_SCREEN_STR-OLDTC sy-vline 
WA_SPACK_SCREEN_STR-NEWTC sy-vline 
WA_SPACK_SCREEN_STR-EDIT_TITLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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