ABAP Select data from SAP table LVC_S_DATA_WAO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LVC_S_DATA_WAO
*  INTO TABLE @DATA(IT_LVC_S_DATA_WAO2).
*--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_LVC_S_DATA_WAO INDEX 1 INTO DATA(WA_LVC_S_DATA_WAO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LVC_S_DATA_WAO>-COL_POS = 1.
<LVC_S_DATA_WAO>-ROW_POS = 1.
<LVC_S_DATA_WAO>-STYLE = 1.
<LVC_S_DATA_WAO>-VALUE = 1.
<LVC_S_DATA_WAO>-DRAGDROPID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LVC_S_DATA_WAO-STYLE2, sy-vline,
  WA_LVC_S_DATA_WAO-STYLE3, sy-vline,
  WA_LVC_S_DATA_WAO-MERGEHORIZ, sy-vline,
  WA_LVC_S_DATA_WAO-MERGEVERT, sy-vline,
  WA_LVC_S_DATA_WAO-INTTYPE, sy-vline,
  WA_LVC_S_DATA_WAO-MAXLEN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LVC_S_DATA_WAO 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_LVC_S_DATA_WAO 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_LVC_S_DATA_WAO INTO WA_LVC_S_DATA_WAO.


*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_LVC_S_DATA_WAO_STR, 
COL_POS TYPE STRING,
ROW_POS TYPE STRING,
STYLE TYPE STRING,
VALUE TYPE STRING,
DRAGDROPID TYPE STRING,
STYLE2 TYPE STRING,
STYLE3 TYPE STRING,
MERGEHORIZ TYPE STRING,
MERGEVERT TYPE STRING,
INTTYPE TYPE STRING,
MAXLEN TYPE STRING,
STYLE4 TYPE STRING,
ROW_ID TYPE STRING,
SUB_ROW_ID TYPE STRING,
COL_ID TYPE STRING,
HREF_HNDL TYPE STRING,
DRDN_HNDL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LVC_S_DATA_WAO_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_LVC_S_DATA_WAO_STR-COL_POS sy-vline 
WA_LVC_S_DATA_WAO_STR-ROW_POS sy-vline 
WA_LVC_S_DATA_WAO_STR-STYLE sy-vline 
WA_LVC_S_DATA_WAO_STR-VALUE sy-vline 
WA_LVC_S_DATA_WAO_STR-DRAGDROPID sy-vline 
WA_LVC_S_DATA_WAO_STR-STYLE2 sy-vline 
WA_LVC_S_DATA_WAO_STR-STYLE3 sy-vline 
WA_LVC_S_DATA_WAO_STR-MERGEHORIZ sy-vline 
WA_LVC_S_DATA_WAO_STR-MERGEVERT sy-vline 
WA_LVC_S_DATA_WAO_STR-INTTYPE sy-vline 
WA_LVC_S_DATA_WAO_STR-MAXLEN sy-vline 
WA_LVC_S_DATA_WAO_STR-STYLE4 sy-vline 
WA_LVC_S_DATA_WAO_STR-ROW_ID sy-vline 
WA_LVC_S_DATA_WAO_STR-SUB_ROW_ID sy-vline 
WA_LVC_S_DATA_WAO_STR-COL_ID sy-vline 
WA_LVC_S_DATA_WAO_STR-HREF_HNDL sy-vline 
WA_LVC_S_DATA_WAO_STR-DRDN_HNDL sy-vline      INTO ld_text SEPARATED BY SPACE.

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