ABAP Select data from SAP table /SDF/SQLD_WDIA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SDF/SQLD_WDIA
*  INTO TABLE @DATA(IT_/SDF/SQLD_WDIA2).
*--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_/SDF/SQLD_WDIA INDEX 1 INTO DATA(WA_/SDF/SQLD_WDIA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SDF/SQLD_WDIA>-RECNO = 1.
</SDF/SQLD_WDIA>-DISPCNT = 1.
</SDF/SQLD_WDIA>-DATE = 1.
</SDF/SQLD_WDIA>-STARTDATE = 1.
</SDF/SQLD_WDIA>-STARTTIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SDF/SQLD_WDIA-ENDDATE, sy-vline,
  WA_/SDF/SQLD_WDIA-ENDTIME, sy-vline,
  WA_/SDF/SQLD_WDIA-RESPTI, sy-vline,
  WA_/SDF/SQLD_WDIA-CPUTI, sy-vline,
  WA_/SDF/SQLD_WDIA-QUEUETI, sy-vline,
  WA_/SDF/SQLD_WDIA-WPID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SDF/SQLD_WDIA 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_/SDF/SQLD_WDIA 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_/SDF/SQLD_WDIA INTO WA_/SDF/SQLD_WDIA.


*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_/SDF/SQLD_WDIA_STR, 
RECNO TYPE STRING,
DISPCNT TYPE STRING,
DATE TYPE STRING,
STARTDATE TYPE STRING,
STARTTIME TYPE STRING,
ENDDATE TYPE STRING,
ENDTIME TYPE STRING,
RESPTI TYPE STRING,
CPUTI TYPE STRING,
QUEUETI TYPE STRING,
WPID TYPE STRING,
TASKTYPE TYPE STRING,
TABLOAD TYPE STRING,
DYNPRONR TYPE STRING,
REPORT TYPE STRING,
ACCOUNT TYPE STRING,
MANDT TYPE STRING,
ROLLKEY TYPE STRING,
INPUTLEN TYPE STRING,
OUTPUTLEN TYPE STRING,
MAXROLL TYPE STRING,
MAXPAGE TYPE STRING,
ROLLINCNT TYPE STRING,
ROLLINTI TYPE STRING,
ROLLOUTCNT TYPE STRING,
ROLLOUTTI TYPE STRING,
LOCKCNT TYPE STRING,
LOCKTI TYPE STRING,
TXXXCNT TYPE STRING,
TXXXTI TYPE STRING,
READDIRCNT TYPE STRING,
READDIRTI TYPE STRING,
READDIRREC TYPE STRING,
READDIRBUF TYPE STRING,
READSEQCNT TYPE STRING,
READSEQTI TYPE STRING,
READSEQREC TYPE STRING,
READSEQBUF TYPE STRING,
PHYREADCNT TYPE STRING,
INSCNT TYPE STRING,
INSTI TYPE STRING,
INSREC TYPE STRING,
PHYINSCNT TYPE STRING,
UPDCNT TYPE STRING,
UPDTI TYPE STRING,
UPDREC TYPE STRING,
PHYUPDCNT TYPE STRING,
DELCNT TYPE STRING,
DELTI TYPE STRING,
DELREC TYPE STRING,
PHYDELCNT TYPE STRING,
COMMITTI TYPE STRING,
GENERATETI TYPE STRING,
REPLOADTI TYPE STRING,
CUALOADTI TYPE STRING,
DYNPLOADTI TYPE STRING,
NTABCNT TYPE STRING,
DSQLCNT TYPE STRING,
ABAPSCNT TYPE STRING,
ABAPLCNT TYPE STRING,
DYNPSCNT TYPE STRING,
DYNPLCNT TYPE STRING,
CUALCNT TYPE STRING,
QUECNT TYPE STRING,
QUETI TYPE STRING,
DDICCNT TYPE STRING,
DDICTI TYPE STRING,
RFCCNT TYPE STRING,
RFCTI TYPE STRING,
MCTI TYPE STRING,
MCREADCNT TYPE STRING,
MCUPDCNT TYPE STRING,
MCINSCNT TYPE STRING,
MCDELCNT TYPE STRING,
MEMSUM TYPE STRING,
PRIVSUM TYPE STRING,
USEDBYTES TYPE STRING,
MAXBYTES TYPE STRING,
MAXBYTESDI TYPE STRING,
PRIVMODE TYPE STRING,
WPRESTART TYPE STRING,
TRANSID TYPE STRING,
ROLLED_OUT TYPE STRING,
DBPROCCNT TYPE STRING,
DBPROCTI TYPE STRING,
TERMINALID TYPE STRING,
CUA_PROG TYPE STRING,
CUA_FUNC TYPE STRING,
TCODE TYPE STRING,
V1SATI TYPE STRING,
GUITIME TYPE STRING,
GUICNT TYPE STRING,
GUINETTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SDF/SQLD_WDIA_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_/SDF/SQLD_WDIA_STR-RECNO sy-vline 
WA_/SDF/SQLD_WDIA_STR-DISPCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-DATE sy-vline 
WA_/SDF/SQLD_WDIA_STR-STARTDATE sy-vline 
WA_/SDF/SQLD_WDIA_STR-STARTTIME sy-vline 
WA_/SDF/SQLD_WDIA_STR-ENDDATE sy-vline 
WA_/SDF/SQLD_WDIA_STR-ENDTIME sy-vline 
WA_/SDF/SQLD_WDIA_STR-RESPTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-CPUTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-QUEUETI sy-vline 
WA_/SDF/SQLD_WDIA_STR-WPID sy-vline 
WA_/SDF/SQLD_WDIA_STR-TASKTYPE sy-vline 
WA_/SDF/SQLD_WDIA_STR-TABLOAD sy-vline 
WA_/SDF/SQLD_WDIA_STR-DYNPRONR sy-vline 
WA_/SDF/SQLD_WDIA_STR-REPORT sy-vline 
WA_/SDF/SQLD_WDIA_STR-ACCOUNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-MANDT sy-vline 
WA_/SDF/SQLD_WDIA_STR-ROLLKEY sy-vline 
WA_/SDF/SQLD_WDIA_STR-INPUTLEN sy-vline 
WA_/SDF/SQLD_WDIA_STR-OUTPUTLEN sy-vline 
WA_/SDF/SQLD_WDIA_STR-MAXROLL sy-vline 
WA_/SDF/SQLD_WDIA_STR-MAXPAGE sy-vline 
WA_/SDF/SQLD_WDIA_STR-ROLLINCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-ROLLINTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-ROLLOUTCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-ROLLOUTTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-LOCKCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-LOCKTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-TXXXCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-TXXXTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-READDIRCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-READDIRTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-READDIRREC sy-vline 
WA_/SDF/SQLD_WDIA_STR-READDIRBUF sy-vline 
WA_/SDF/SQLD_WDIA_STR-READSEQCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-READSEQTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-READSEQREC sy-vline 
WA_/SDF/SQLD_WDIA_STR-READSEQBUF sy-vline 
WA_/SDF/SQLD_WDIA_STR-PHYREADCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-INSCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-INSTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-INSREC sy-vline 
WA_/SDF/SQLD_WDIA_STR-PHYINSCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-UPDCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-UPDTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-UPDREC sy-vline 
WA_/SDF/SQLD_WDIA_STR-PHYUPDCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-DELCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-DELTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-DELREC sy-vline 
WA_/SDF/SQLD_WDIA_STR-PHYDELCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-COMMITTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-GENERATETI sy-vline 
WA_/SDF/SQLD_WDIA_STR-REPLOADTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-CUALOADTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-DYNPLOADTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-NTABCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-DSQLCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-ABAPSCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-ABAPLCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-DYNPSCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-DYNPLCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-CUALCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-QUECNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-QUETI sy-vline 
WA_/SDF/SQLD_WDIA_STR-DDICCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-DDICTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-RFCCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-RFCTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-MCTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-MCREADCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-MCUPDCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-MCINSCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-MCDELCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-MEMSUM sy-vline 
WA_/SDF/SQLD_WDIA_STR-PRIVSUM sy-vline 
WA_/SDF/SQLD_WDIA_STR-USEDBYTES sy-vline 
WA_/SDF/SQLD_WDIA_STR-MAXBYTES sy-vline 
WA_/SDF/SQLD_WDIA_STR-MAXBYTESDI sy-vline 
WA_/SDF/SQLD_WDIA_STR-PRIVMODE sy-vline 
WA_/SDF/SQLD_WDIA_STR-WPRESTART sy-vline 
WA_/SDF/SQLD_WDIA_STR-TRANSID sy-vline 
WA_/SDF/SQLD_WDIA_STR-ROLLED_OUT sy-vline 
WA_/SDF/SQLD_WDIA_STR-DBPROCCNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-DBPROCTI sy-vline 
WA_/SDF/SQLD_WDIA_STR-TERMINALID sy-vline 
WA_/SDF/SQLD_WDIA_STR-CUA_PROG sy-vline 
WA_/SDF/SQLD_WDIA_STR-CUA_FUNC sy-vline 
WA_/SDF/SQLD_WDIA_STR-TCODE sy-vline 
WA_/SDF/SQLD_WDIA_STR-V1SATI sy-vline 
WA_/SDF/SQLD_WDIA_STR-GUITIME sy-vline 
WA_/SDF/SQLD_WDIA_STR-GUICNT sy-vline 
WA_/SDF/SQLD_WDIA_STR-GUINETTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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