ABAP Select data from SAP table WCSALV38 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WCSALV38 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 WCSALV38. 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 WCSALV38 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_WCSALV38 TYPE STANDARD TABLE OF WCSALV38,
      WA_WCSALV38 TYPE WCSALV38,
      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: <WCSALV38> TYPE WCSALV38.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WCSALV38.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WCSALV38
  INTO TABLE IT_WCSALV38.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCSALV38
*  INTO TABLE @DATA(IT_WCSALV382).
*--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_WCSALV38 INDEX 1 INTO DATA(WA_WCSALV382).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WCSALV38 ASSIGNING <WCSALV38>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCSALV38>-LUNR = 1.
<WCSALV38>-OBJNR = 1.
<WCSALV38>-STXT = 1.
<WCSALV38>-LUTYP = 1.
<WCSALV38>-LUUSE = 1.

ENDLOOP.

LOOP AT IT_WCSALV38 INTO WA_WCSALV38.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCSALV38-IWERK, sy-vline,
  WA_WCSALV38-INGRP, sy-vline,
  WA_WCSALV38-WKCR, sy-vline,
  WA_WCSALV38-PLANT, sy-vline,
  WA_WCSALV38-WKCRTYP, sy-vline,
  WA_WCSALV38-WKCRID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCSALV38 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_WCSALV38 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_WCSALV38 INTO WA_WCSALV38.


*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 LUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCSALV38-LUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSALV38-LUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_WCSALV38-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSALV38-TPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCSALV38-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSALV38-EQUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFLUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCSALV38-REFLUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSALV38-REFLUNR.
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_WCSALV38_STR, 
LUNR TYPE STRING,
OBJNR TYPE STRING,
STXT TYPE STRING,
LUTYP TYPE STRING,
LUUSE TYPE STRING,
IWERK TYPE STRING,
INGRP TYPE STRING,
WKCR TYPE STRING,
PLANT TYPE STRING,
WKCRTYP TYPE STRING,
WKCRID TYPE STRING,
BEGRU TYPE STRING,
ANLZU TYPE STRING,
TGGRP TYPE STRING,
TPLNR TYPE STRING,
STRNO TYPE STRING,
EQUNR TYPE STRING,
TRAIN TYPE STRING,
LUPVERLVL TYPE STRING,
LUCVERLVL TYPE STRING,
LFLG TYPE STRING,
LTXTICON TYPE STRING,
REFLUNR TYPE STRING,
REFOBJ TYPE STRING,
SYSST TYPE STRING,
USRST TYPE STRING,
DATEFR TYPE STRING,
TIMEFR TYPE STRING,
DATETO TYPE STRING,
TIMETO TYPE STRING,
CRNAME TYPE STRING,
CRDATE TYPE STRING,
CRTIME TYPE STRING,
CHNAME TYPE STRING,
CHDATE TYPE STRING,
CHTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCSALV38_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_WCSALV38_STR-LUNR sy-vline 
WA_WCSALV38_STR-OBJNR sy-vline 
WA_WCSALV38_STR-STXT sy-vline 
WA_WCSALV38_STR-LUTYP sy-vline 
WA_WCSALV38_STR-LUUSE sy-vline 
WA_WCSALV38_STR-IWERK sy-vline 
WA_WCSALV38_STR-INGRP sy-vline 
WA_WCSALV38_STR-WKCR sy-vline 
WA_WCSALV38_STR-PLANT sy-vline 
WA_WCSALV38_STR-WKCRTYP sy-vline 
WA_WCSALV38_STR-WKCRID sy-vline 
WA_WCSALV38_STR-BEGRU sy-vline 
WA_WCSALV38_STR-ANLZU sy-vline 
WA_WCSALV38_STR-TGGRP sy-vline 
WA_WCSALV38_STR-TPLNR sy-vline 
WA_WCSALV38_STR-STRNO sy-vline 
WA_WCSALV38_STR-EQUNR sy-vline 
WA_WCSALV38_STR-TRAIN sy-vline 
WA_WCSALV38_STR-LUPVERLVL sy-vline 
WA_WCSALV38_STR-LUCVERLVL sy-vline 
WA_WCSALV38_STR-LFLG sy-vline 
WA_WCSALV38_STR-LTXTICON sy-vline 
WA_WCSALV38_STR-REFLUNR sy-vline 
WA_WCSALV38_STR-REFOBJ sy-vline 
WA_WCSALV38_STR-SYSST sy-vline 
WA_WCSALV38_STR-USRST sy-vline 
WA_WCSALV38_STR-DATEFR sy-vline 
WA_WCSALV38_STR-TIMEFR sy-vline 
WA_WCSALV38_STR-DATETO sy-vline 
WA_WCSALV38_STR-TIMETO sy-vline 
WA_WCSALV38_STR-CRNAME sy-vline 
WA_WCSALV38_STR-CRDATE sy-vline 
WA_WCSALV38_STR-CRTIME sy-vline 
WA_WCSALV38_STR-CHNAME sy-vline 
WA_WCSALV38_STR-CHDATE sy-vline 
WA_WCSALV38_STR-CHTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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