ABAP Select data from SAP table /TDAG/RCSS_DATAW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /TDAG/RCSS_DATAW
*  INTO TABLE @DATA(IT_/TDAG/RCSS_DATAW2).
*--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_/TDAG/RCSS_DATAW INDEX 1 INTO DATA(WA_/TDAG/RCSS_DATAW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</TDAG/RCSS_DATAW>-MANDT = 1.
</TDAG/RCSS_DATAW>-GUID = 1.
</TDAG/RCSS_DATAW>-CRDAT = 1.
</TDAG/RCSS_DATAW>-CRNAM = 1.
</TDAG/RCSS_DATAW>-CRTSTMP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/TDAG/RCSS_DATAW-UPDDAT, sy-vline,
  WA_/TDAG/RCSS_DATAW-UPDNAM, sy-vline,
  WA_/TDAG/RCSS_DATAW-UPDTSTMP, sy-vline,
  WA_/TDAG/RCSS_DATAW-DELFLG, sy-vline,
  WA_/TDAG/RCSS_DATAW-DATAWID, sy-vline,
  WA_/TDAG/RCSS_DATAW-NAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/TDAG/RCSS_DATAW 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_/TDAG/RCSS_DATAW 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_/TDAG/RCSS_DATAW INTO WA_/TDAG/RCSS_DATAW.


*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 DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/RCSS_DATAW-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/RCSS_DATAW-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECNROOT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/RCSS_DATAW-RECNROOT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/RCSS_DATAW-RECNROOT.
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_/TDAG/RCSS_DATAW_STR, 
MANDT TYPE STRING,
GUID TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
CRTSTMP TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
UPDTSTMP TYPE STRING,
DELFLG TYPE STRING,
DATAWID TYPE STRING,
NAME TYPE STRING,
JUSTIFICATION TYPE STRING,
DATE_AVAIL TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
DOKTX TYPE STRING,
STATUS TYPE STRING,
TYPE TYPE STRING,
KEY_STUDY TYPE STRING,
COV_REL TYPE STRING,
RECNROOT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/TDAG/RCSS_DATAW_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_/TDAG/RCSS_DATAW_STR-MANDT sy-vline 
WA_/TDAG/RCSS_DATAW_STR-GUID sy-vline 
WA_/TDAG/RCSS_DATAW_STR-CRDAT sy-vline 
WA_/TDAG/RCSS_DATAW_STR-CRNAM sy-vline 
WA_/TDAG/RCSS_DATAW_STR-CRTSTMP sy-vline 
WA_/TDAG/RCSS_DATAW_STR-UPDDAT sy-vline 
WA_/TDAG/RCSS_DATAW_STR-UPDNAM sy-vline 
WA_/TDAG/RCSS_DATAW_STR-UPDTSTMP sy-vline 
WA_/TDAG/RCSS_DATAW_STR-DELFLG sy-vline 
WA_/TDAG/RCSS_DATAW_STR-DATAWID sy-vline 
WA_/TDAG/RCSS_DATAW_STR-NAME sy-vline 
WA_/TDAG/RCSS_DATAW_STR-JUSTIFICATION sy-vline 
WA_/TDAG/RCSS_DATAW_STR-DATE_AVAIL sy-vline 
WA_/TDAG/RCSS_DATAW_STR-DOKAR sy-vline 
WA_/TDAG/RCSS_DATAW_STR-DOKNR sy-vline 
WA_/TDAG/RCSS_DATAW_STR-DOKVR sy-vline 
WA_/TDAG/RCSS_DATAW_STR-DOKTL sy-vline 
WA_/TDAG/RCSS_DATAW_STR-DOKTX sy-vline 
WA_/TDAG/RCSS_DATAW_STR-STATUS sy-vline 
WA_/TDAG/RCSS_DATAW_STR-TYPE sy-vline 
WA_/TDAG/RCSS_DATAW_STR-KEY_STUDY sy-vline 
WA_/TDAG/RCSS_DATAW_STR-COV_REL sy-vline 
WA_/TDAG/RCSS_DATAW_STR-RECNROOT sy-vline      INTO ld_text SEPARATED BY SPACE.

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