ABAP Select data from SAP table DV_TWISPC_PLSCHW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DV_TWISPC_PLSCHW
*  INTO TABLE @DATA(IT_DV_TWISPC_PLSCHW2).
*--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_DV_TWISPC_PLSCHW INDEX 1 INTO DATA(WA_DV_TWISPC_PLSCHW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DV_TWISPC_PLSCHW>-MANDT = 1.
<DV_TWISPC_PLSCHW>-PLSZN = 1.
<DV_TWISPC_PLSCHW>-PLSCH = 1.
<DV_TWISPC_PLSCHW>-PSM_DOKU = 1.
<DV_TWISPC_PLSCHW>-PSM_DIALOG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DV_TWISPC_PLSCHW-PSM_MASCH, sy-vline,
  WA_DV_TWISPC_PLSCHW-PSM_TRANS, sy-vline,
  WA_DV_TWISPC_PLSCHW-DBTAB, sy-vline,
  WA_DV_TWISPC_PLSCHW-PLPDZ, sy-vline,
  WA_DV_TWISPC_PLSCHW-SCHCREUSR, sy-vline,
  WA_DV_TWISPC_PLSCHW-SCHCREDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DV_TWISPC_PLSCHW 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_DV_TWISPC_PLSCHW 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_DV_TWISPC_PLSCHW INTO WA_DV_TWISPC_PLSCHW.


*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 VRSAC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DV_TWISPC_PLSCHW-VRSAC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DV_TWISPC_PLSCHW-VRSAC.
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_DV_TWISPC_PLSCHW_STR, 
MANDT TYPE STRING,
PLSZN TYPE STRING,
PLSCH TYPE STRING,
PSM_DOKU TYPE STRING,
PSM_DIALOG TYPE STRING,
PSM_MASCH TYPE STRING,
PSM_TRANS TYPE STRING,
DBTAB TYPE STRING,
PLPDZ TYPE STRING,
SCHCREUSR TYPE STRING,
SCHCREDAT TYPE STRING,
SCHCREUZT TYPE STRING,
SCHCHGUSR TYPE STRING,
SCHCHGDAT TYPE STRING,
SCHCHGUZT TYPE STRING,
VRSAC TYPE STRING,
MCINF TYPE STRING,
PLGJV TYPE STRING,
PLSCHNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DV_TWISPC_PLSCHW_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_DV_TWISPC_PLSCHW_STR-MANDT sy-vline 
WA_DV_TWISPC_PLSCHW_STR-PLSZN sy-vline 
WA_DV_TWISPC_PLSCHW_STR-PLSCH sy-vline 
WA_DV_TWISPC_PLSCHW_STR-PSM_DOKU sy-vline 
WA_DV_TWISPC_PLSCHW_STR-PSM_DIALOG sy-vline 
WA_DV_TWISPC_PLSCHW_STR-PSM_MASCH sy-vline 
WA_DV_TWISPC_PLSCHW_STR-PSM_TRANS sy-vline 
WA_DV_TWISPC_PLSCHW_STR-DBTAB sy-vline 
WA_DV_TWISPC_PLSCHW_STR-PLPDZ sy-vline 
WA_DV_TWISPC_PLSCHW_STR-SCHCREUSR sy-vline 
WA_DV_TWISPC_PLSCHW_STR-SCHCREDAT sy-vline 
WA_DV_TWISPC_PLSCHW_STR-SCHCREUZT sy-vline 
WA_DV_TWISPC_PLSCHW_STR-SCHCHGUSR sy-vline 
WA_DV_TWISPC_PLSCHW_STR-SCHCHGDAT sy-vline 
WA_DV_TWISPC_PLSCHW_STR-SCHCHGUZT sy-vline 
WA_DV_TWISPC_PLSCHW_STR-VRSAC sy-vline 
WA_DV_TWISPC_PLSCHW_STR-MCINF sy-vline 
WA_DV_TWISPC_PLSCHW_STR-PLGJV sy-vline 
WA_DV_TWISPC_PLSCHW_STR-PLSCHNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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