ABAP Select data from SAP table /SCWM/V_WORKST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCWM/V_WORKST 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 /SCWM/V_WORKST. 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 /SCWM/V_WORKST 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_/SCWM/V_WORKST TYPE STANDARD TABLE OF /SCWM/V_WORKST,
      WA_/SCWM/V_WORKST TYPE /SCWM/V_WORKST,
      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: </SCWM/V_WORKST> TYPE /SCWM/V_WORKST.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCWM/V_WORKST
  INTO TABLE IT_/SCWM/V_WORKST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/V_WORKST
*  INTO TABLE @DATA(IT_/SCWM/V_WORKST2).
*--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_/SCWM/V_WORKST INDEX 1 INTO DATA(WA_/SCWM/V_WORKST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCWM/V_WORKST ASSIGNING </SCWM/V_WORKST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/V_WORKST>-MANDT = 1.
</SCWM/V_WORKST>-LGNUM = 1.
</SCWM/V_WORKST>-WORKSTATION = 1.
</SCWM/V_WORKST>-DESCRIPTION = 1.
</SCWM/V_WORKST>-PROCS = 1.

ENDLOOP.

LOOP AT IT_/SCWM/V_WORKST INTO WA_/SCWM/V_WORKST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/V_WORKST-LGTYP, sy-vline,
  WA_/SCWM/V_WORKST-I_SECTION, sy-vline,
  WA_/SCWM/V_WORKST-O_SECTION, sy-vline,
  WA_/SCWM/V_WORKST-PROCTY, sy-vline,
  WA_/SCWM/V_WORKST-WRKSTTYP, sy-vline,
  WA_/SCWM/V_WORKST-HUINPUT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/V_WORKST 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_/SCWM/V_WORKST 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_/SCWM/V_WORKST INTO WA_/SCWM/V_WORKST.


*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_/SCWM/V_WORKST_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
WORKSTATION TYPE STRING,
DESCRIPTION TYPE STRING,
PROCS TYPE STRING,
LGTYP TYPE STRING,
I_SECTION TYPE STRING,
O_SECTION TYPE STRING,
PROCTY TYPE STRING,
WRKSTTYP TYPE STRING,
HUINPUT TYPE STRING,
PRT_CTLIST TYPE STRING,
RL_PROCTY TYPE STRING,
RLTYP TYPE STRING,
RLBER TYPE STRING,
MV_HU_PROCTY TYPE STRING,
ACTTY TYPE STRING,
AAREA_PLAN TYPE STRING,
SAVE_ACT TYPE STRING,
LOCK_SOURCE TYPE STRING,
CHKPACK_DSTGRP TYPE STRING,
CHKPACK_STOPROUT TYPE STRING,
PACK_ACTWT TYPE STRING,
CWMEAS TYPE STRING,
TAKE_QUAN_IND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/V_WORKST_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_/SCWM/V_WORKST_STR-MANDT sy-vline 
WA_/SCWM/V_WORKST_STR-LGNUM sy-vline 
WA_/SCWM/V_WORKST_STR-WORKSTATION sy-vline 
WA_/SCWM/V_WORKST_STR-DESCRIPTION sy-vline 
WA_/SCWM/V_WORKST_STR-PROCS sy-vline 
WA_/SCWM/V_WORKST_STR-LGTYP sy-vline 
WA_/SCWM/V_WORKST_STR-I_SECTION sy-vline 
WA_/SCWM/V_WORKST_STR-O_SECTION sy-vline 
WA_/SCWM/V_WORKST_STR-PROCTY sy-vline 
WA_/SCWM/V_WORKST_STR-WRKSTTYP sy-vline 
WA_/SCWM/V_WORKST_STR-HUINPUT sy-vline 
WA_/SCWM/V_WORKST_STR-PRT_CTLIST sy-vline 
WA_/SCWM/V_WORKST_STR-RL_PROCTY sy-vline 
WA_/SCWM/V_WORKST_STR-RLTYP sy-vline 
WA_/SCWM/V_WORKST_STR-RLBER sy-vline 
WA_/SCWM/V_WORKST_STR-MV_HU_PROCTY sy-vline 
WA_/SCWM/V_WORKST_STR-ACTTY sy-vline 
WA_/SCWM/V_WORKST_STR-AAREA_PLAN sy-vline 
WA_/SCWM/V_WORKST_STR-SAVE_ACT sy-vline 
WA_/SCWM/V_WORKST_STR-LOCK_SOURCE sy-vline 
WA_/SCWM/V_WORKST_STR-CHKPACK_DSTGRP sy-vline 
WA_/SCWM/V_WORKST_STR-CHKPACK_STOPROUT sy-vline 
WA_/SCWM/V_WORKST_STR-PACK_ACTWT sy-vline 
WA_/SCWM/V_WORKST_STR-CWMEAS sy-vline 
WA_/SCWM/V_WORKST_STR-TAKE_QUAN_IND sy-vline      INTO ld_text SEPARATED BY SPACE.

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