ABAP Select data from SAP table WLBWDETAG4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WLBWDETAG4 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 WLBWDETAG4. 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 WLBWDETAG4 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_WLBWDETAG4 TYPE STANDARD TABLE OF WLBWDETAG4,
      WA_WLBWDETAG4 TYPE WLBWDETAG4,
      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: <WLBWDETAG4> TYPE WLBWDETAG4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WLBWDETAG4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WLBWDETAG4
  INTO TABLE IT_WLBWDETAG4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WLBWDETAG4
*  INTO TABLE @DATA(IT_WLBWDETAG42).
*--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_WLBWDETAG4 INDEX 1 INTO DATA(WA_WLBWDETAG42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WLBWDETAG4 ASSIGNING <WLBWDETAG4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WLBWDETAG4>-INFOCUBE = 1.
<WLBWDETAG4>-AGGRCUBE = 1.
<WLBWDETAG4>-NRAGGR = 1.
<WLBWDETAG4>-CHANGEMODE = 1.
<WLBWDETAG4>-AGRTIMTOT = 1.

ENDLOOP.

LOOP AT IT_WLBWDETAG4 INTO WA_WLBWDETAG4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WLBWDETAG4-AGAVTIMTOT, sy-vline,
  WA_WLBWDETAG4-TIMEREAD, sy-vline,
  WA_WLBWDETAG4-PCTTIMREAD, sy-vline,
  WA_WLBWDETAG4-AVGTIMREAD, sy-vline,
  WA_WLBWDETAG4-TIMEINSERT, sy-vline,
  WA_WLBWDETAG4-PCTTIMINST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WLBWDETAG4 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_WLBWDETAG4 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_WLBWDETAG4 INTO WA_WLBWDETAG4.


*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_WLBWDETAG4_STR, 
INFOCUBE TYPE STRING,
AGGRCUBE TYPE STRING,
NRAGGR TYPE STRING,
CHANGEMODE TYPE STRING,
AGRTIMTOT TYPE STRING,
AGAVTIMTOT TYPE STRING,
TIMEREAD TYPE STRING,
PCTTIMREAD TYPE STRING,
AVGTIMREAD TYPE STRING,
TIMEINSERT TYPE STRING,
PCTTIMINST TYPE STRING,
AVGTIMINST TYPE STRING,
TIMEINDEX TYPE STRING,
PCTTIMINDX TYPE STRING,
AVGTIMINDX TYPE STRING,
TIMEDBANLY TYPE STRING,
PCTTIMANLY TYPE STRING,
AVGTIMANLY TYPE STRING,
TIMECONDNS TYPE STRING,
PCTTIMCOND TYPE STRING,
AVGTIMCOND TYPE STRING,
REC_READ TYPE STRING,
AVGRECREAD TYPE STRING,
AVGRDTIREC TYPE STRING,
REC_INSERT TYPE STRING,
AVGRECINS TYPE STRING,
AVGINSTIRC TYPE STRING,
NRRECREINS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WLBWDETAG4_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_WLBWDETAG4_STR-INFOCUBE sy-vline 
WA_WLBWDETAG4_STR-AGGRCUBE sy-vline 
WA_WLBWDETAG4_STR-NRAGGR sy-vline 
WA_WLBWDETAG4_STR-CHANGEMODE sy-vline 
WA_WLBWDETAG4_STR-AGRTIMTOT sy-vline 
WA_WLBWDETAG4_STR-AGAVTIMTOT sy-vline 
WA_WLBWDETAG4_STR-TIMEREAD sy-vline 
WA_WLBWDETAG4_STR-PCTTIMREAD sy-vline 
WA_WLBWDETAG4_STR-AVGTIMREAD sy-vline 
WA_WLBWDETAG4_STR-TIMEINSERT sy-vline 
WA_WLBWDETAG4_STR-PCTTIMINST sy-vline 
WA_WLBWDETAG4_STR-AVGTIMINST sy-vline 
WA_WLBWDETAG4_STR-TIMEINDEX sy-vline 
WA_WLBWDETAG4_STR-PCTTIMINDX sy-vline 
WA_WLBWDETAG4_STR-AVGTIMINDX sy-vline 
WA_WLBWDETAG4_STR-TIMEDBANLY sy-vline 
WA_WLBWDETAG4_STR-PCTTIMANLY sy-vline 
WA_WLBWDETAG4_STR-AVGTIMANLY sy-vline 
WA_WLBWDETAG4_STR-TIMECONDNS sy-vline 
WA_WLBWDETAG4_STR-PCTTIMCOND sy-vline 
WA_WLBWDETAG4_STR-AVGTIMCOND sy-vline 
WA_WLBWDETAG4_STR-REC_READ sy-vline 
WA_WLBWDETAG4_STR-AVGRECREAD sy-vline 
WA_WLBWDETAG4_STR-AVGRDTIREC sy-vline 
WA_WLBWDETAG4_STR-REC_INSERT sy-vline 
WA_WLBWDETAG4_STR-AVGRECINS sy-vline 
WA_WLBWDETAG4_STR-AVGINSTIRC sy-vline 
WA_WLBWDETAG4_STR-NRRECREINS sy-vline      INTO ld_text SEPARATED BY SPACE.

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