ABAP Select data from SAP table WCSALV02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WCSALV02 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 WCSALV02. 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 WCSALV02 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_WCSALV02 TYPE STANDARD TABLE OF WCSALV02,
      WA_WCSALV02 TYPE WCSALV02,
      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: <WCSALV02> TYPE WCSALV02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WCSALV02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WCSALV02
  INTO TABLE IT_WCSALV02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCSALV02
*  INTO TABLE @DATA(IT_WCSALV022).
*--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_WCSALV02 INDEX 1 INTO DATA(WA_WCSALV022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WCSALV02 ASSIGNING <WCSALV02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCSALV02>-CNT = 1.
<WCSALV02>-BDATE = 1.
<WCSALV02>-BTIME = 1.
<WCSALV02>-STATTXT04 = 1.
<WCSALV02>-BNAME = 1.

ENDLOOP.

LOOP AT IT_WCSALV02 INTO WA_WCSALV02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCSALV02-TGSTEP, sy-vline,
  WA_WCSALV02-TGPROC, sy-vline,
  WA_WCSALV02-TGTYP, sy-vline,
  WA_WCSALV02-UNSTEP, sy-vline,
  WA_WCSALV02-UNPROC, sy-vline,
  WA_WCSALV02-UNTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCSALV02 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_WCSALV02 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_WCSALV02 INTO WA_WCSALV02.


*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 TGNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCSALV02-TGNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSALV02-TGNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field UNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCSALV02-UNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSALV02-UNNR.
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_WCSALV02_STR, 
CNT TYPE STRING,
BDATE TYPE STRING,
BTIME TYPE STRING,
STATTXT04 TYPE STRING,
BNAME TYPE STRING,
TGSTEP TYPE STRING,
TGPROC TYPE STRING,
TGTYP TYPE STRING,
UNSTEP TYPE STRING,
UNPROC TYPE STRING,
UNTYP TYPE STRING,
PHBLFLG TYPE STRING,
PHBLTYP TYPE STRING,
PHBLNR TYPE STRING,
TGFLG TYPE STRING,
TGFORM TYPE STRING,
TGNR TYPE STRING,
UNFORM TYPE STRING,
UNNR TYPE STRING,
CRNAME TYPE STRING,
CRDATE TYPE STRING,
CRTIME TYPE STRING,
CHNAME TYPE STRING,
CHDATE TYPE STRING,
CHTIME TYPE STRING,
ACTSTEP TYPE STRING,
ACTPROC TYPE STRING,
ACTTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCSALV02_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_WCSALV02_STR-CNT sy-vline 
WA_WCSALV02_STR-BDATE sy-vline 
WA_WCSALV02_STR-BTIME sy-vline 
WA_WCSALV02_STR-STATTXT04 sy-vline 
WA_WCSALV02_STR-BNAME sy-vline 
WA_WCSALV02_STR-TGSTEP sy-vline 
WA_WCSALV02_STR-TGPROC sy-vline 
WA_WCSALV02_STR-TGTYP sy-vline 
WA_WCSALV02_STR-UNSTEP sy-vline 
WA_WCSALV02_STR-UNPROC sy-vline 
WA_WCSALV02_STR-UNTYP sy-vline 
WA_WCSALV02_STR-PHBLFLG sy-vline 
WA_WCSALV02_STR-PHBLTYP sy-vline 
WA_WCSALV02_STR-PHBLNR sy-vline 
WA_WCSALV02_STR-TGFLG sy-vline 
WA_WCSALV02_STR-TGFORM sy-vline 
WA_WCSALV02_STR-TGNR sy-vline 
WA_WCSALV02_STR-UNFORM sy-vline 
WA_WCSALV02_STR-UNNR sy-vline 
WA_WCSALV02_STR-CRNAME sy-vline 
WA_WCSALV02_STR-CRDATE sy-vline 
WA_WCSALV02_STR-CRTIME sy-vline 
WA_WCSALV02_STR-CHNAME sy-vline 
WA_WCSALV02_STR-CHDATE sy-vline 
WA_WCSALV02_STR-CHTIME sy-vline 
WA_WCSALV02_STR-ACTSTEP sy-vline 
WA_WCSALV02_STR-ACTPROC sy-vline 
WA_WCSALV02_STR-ACTTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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