ABAP Select data from SAP table WLBWDETREQ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WLBWDETREQ
*  INTO TABLE @DATA(IT_WLBWDETREQ2).
*--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_WLBWDETREQ INDEX 1 INTO DATA(WA_WLBWDETREQ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WLBWDETREQ>-REQUESTID = 1.
<WLBWDETREQ>-TARGET = 1.
<WLBWDETREQ>-INFOSOURCE = 1.
<WLBWDETREQ>-TIMETOTAL = 1.
<WLBWDETREQ>-TIMSOURCE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WLBWDETREQ-NRRCRDSRC, sy-vline,
  WA_WLBWDETREQ-TIMTRANSF, sy-vline,
  WA_WLBWDETREQ-NRRCRDTRF, sy-vline,
  WA_WLBWDETREQ-TIMEPSA, sy-vline,
  WA_WLBWDETREQ-NRRCRDPSA, sy-vline,
  WA_WLBWDETREQ-TIMUPDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WLBWDETREQ 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_WLBWDETREQ 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_WLBWDETREQ INTO WA_WLBWDETREQ.


*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_WLBWDETREQ_STR, 
REQUESTID TYPE STRING,
TARGET TYPE STRING,
INFOSOURCE TYPE STRING,
TIMETOTAL TYPE STRING,
TIMSOURCE TYPE STRING,
NRRCRDSRC TYPE STRING,
TIMTRANSF TYPE STRING,
NRRCRDTRF TYPE STRING,
TIMEPSA TYPE STRING,
NRRCRDPSA TYPE STRING,
TIMUPDATE TYPE STRING,
NRRCRDUPD TYPE STRING,
TIMTARGET TYPE STRING,
NRRCRDTGT TYPE STRING,
LOGSYS TYPE STRING,
UNAME TYPE STRING,
IPAKID TYPE STRING,
MANUAL TYPE STRING,
TFMETHOD TYPE STRING,
STARTTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WLBWDETREQ_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_WLBWDETREQ_STR-REQUESTID sy-vline 
WA_WLBWDETREQ_STR-TARGET sy-vline 
WA_WLBWDETREQ_STR-INFOSOURCE sy-vline 
WA_WLBWDETREQ_STR-TIMETOTAL sy-vline 
WA_WLBWDETREQ_STR-TIMSOURCE sy-vline 
WA_WLBWDETREQ_STR-NRRCRDSRC sy-vline 
WA_WLBWDETREQ_STR-TIMTRANSF sy-vline 
WA_WLBWDETREQ_STR-NRRCRDTRF sy-vline 
WA_WLBWDETREQ_STR-TIMEPSA sy-vline 
WA_WLBWDETREQ_STR-NRRCRDPSA sy-vline 
WA_WLBWDETREQ_STR-TIMUPDATE sy-vline 
WA_WLBWDETREQ_STR-NRRCRDUPD sy-vline 
WA_WLBWDETREQ_STR-TIMTARGET sy-vline 
WA_WLBWDETREQ_STR-NRRCRDTGT sy-vline 
WA_WLBWDETREQ_STR-LOGSYS sy-vline 
WA_WLBWDETREQ_STR-UNAME sy-vline 
WA_WLBWDETREQ_STR-IPAKID sy-vline 
WA_WLBWDETREQ_STR-MANUAL sy-vline 
WA_WLBWDETREQ_STR-TFMETHOD sy-vline 
WA_WLBWDETREQ_STR-STARTTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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