ABAP Select data from SAP table WLBIDTPSYS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WLBIDTPSYS
*  INTO TABLE @DATA(IT_WLBIDTPSYS2).
*--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_WLBIDTPSYS INDEX 1 INTO DATA(WA_WLBIDTPSYS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WLBIDTPSYS>-SRCSYSTEM = 1.
<WLBIDTPSYS>-NRSOURCES = 1.
<WLBIDTPSYS>-NRTARGETS = 1.
<WLBIDTPSYS>-NRREQUESTS = 1.
<WLBIDTPSYS>-NUMPACKAGE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WLBIDTPSYS-AVGPACKAGE, sy-vline,
  WA_WLBIDTPSYS-TIMETOTAL, sy-vline,
  WA_WLBIDTPSYS-TIMETOTAVG, sy-vline,
  WA_WLBIDTPSYS-MEDTTOTAL, sy-vline,
  WA_WLBIDTPSYS-TIMETOTCUM, sy-vline,
  WA_WLBIDTPSYS-TIMETCMAVG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WLBIDTPSYS 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_WLBIDTPSYS 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_WLBIDTPSYS INTO WA_WLBIDTPSYS.


*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_WLBIDTPSYS_STR, 
SRCSYSTEM TYPE STRING,
NRSOURCES TYPE STRING,
NRTARGETS TYPE STRING,
NRREQUESTS TYPE STRING,
NUMPACKAGE TYPE STRING,
AVGPACKAGE TYPE STRING,
TIMETOTAL TYPE STRING,
TIMETOTAVG TYPE STRING,
MEDTTOTAL TYPE STRING,
TIMETOTCUM TYPE STRING,
TIMETCMAVG TYPE STRING,
RECS_MAX TYPE STRING,
SIZE_MAX TYPE STRING,
TIMESRC TYPE STRING,
TIMESRCPCT TYPE STRING,
TIMESRCAVG TYPE STRING,
RECSSRC TYPE STRING,
RECSSRCAVG TYPE STRING,
SIZESRC TYPE STRING,
SIZESRCAVG TYPE STRING,
TIMEERRF TYPE STRING,
TIMEERFPCT TYPE STRING,
TIMEERFAVG TYPE STRING,
RECSERRF_S TYPE STRING,
RCSERFSAVG TYPE STRING,
RECSERRF_F TYPE STRING,
RCSERFFAVG TYPE STRING,
SIZEERRF_S TYPE STRING,
SIZERFSAVG TYPE STRING,
SIZEERRF_F TYPE STRING,
SIZERFFAVG TYPE STRING,
TIMETRFN TYPE STRING,
TIMETRFPCT TYPE STRING,
TIMETRFAVG TYPE STRING,
RECSTRFN_S TYPE STRING,
RCSTRFSAVG TYPE STRING,
RECSTRFN_F TYPE STRING,
RCSTRFFAVG TYPE STRING,
SIZETRFN_S TYPE STRING,
SIZTRFSAVG TYPE STRING,
SIZETRFN_F TYPE STRING,
SIZTRFFAVG TYPE STRING,
NUMTRFN TYPE STRING,
AVGTRFN TYPE STRING,
TIMETGT TYPE STRING,
TIMETGTPCT TYPE STRING,
TIMETGTAVG TYPE STRING,
RECSTGT_S TYPE STRING,
RCSTGTSAVG TYPE STRING,
RECSTGT_F TYPE STRING,
RCSTGTFAVG TYPE STRING,
SIZETGT_S TYPE STRING,
SIZTGTSAVG TYPE STRING,
TSTMP_START TYPE STRING,
REQUID TYPE STRING,
REQUEST TYPE STRING,
LOGSYS TYPE STRING,
DTP TYPE STRING,
UNAME TYPE STRING,
USTATE TYPE STRING,
TSTATE TYPE STRING,
TARGETSTATE TYPE STRING,
PROCESSMODE TYPE STRING,
LINECOLOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WLBIDTPSYS_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_WLBIDTPSYS_STR-SRCSYSTEM sy-vline 
WA_WLBIDTPSYS_STR-NRSOURCES sy-vline 
WA_WLBIDTPSYS_STR-NRTARGETS sy-vline 
WA_WLBIDTPSYS_STR-NRREQUESTS sy-vline 
WA_WLBIDTPSYS_STR-NUMPACKAGE sy-vline 
WA_WLBIDTPSYS_STR-AVGPACKAGE sy-vline 
WA_WLBIDTPSYS_STR-TIMETOTAL sy-vline 
WA_WLBIDTPSYS_STR-TIMETOTAVG sy-vline 
WA_WLBIDTPSYS_STR-MEDTTOTAL sy-vline 
WA_WLBIDTPSYS_STR-TIMETOTCUM sy-vline 
WA_WLBIDTPSYS_STR-TIMETCMAVG sy-vline 
WA_WLBIDTPSYS_STR-RECS_MAX sy-vline 
WA_WLBIDTPSYS_STR-SIZE_MAX sy-vline 
WA_WLBIDTPSYS_STR-TIMESRC sy-vline 
WA_WLBIDTPSYS_STR-TIMESRCPCT sy-vline 
WA_WLBIDTPSYS_STR-TIMESRCAVG sy-vline 
WA_WLBIDTPSYS_STR-RECSSRC sy-vline 
WA_WLBIDTPSYS_STR-RECSSRCAVG sy-vline 
WA_WLBIDTPSYS_STR-SIZESRC sy-vline 
WA_WLBIDTPSYS_STR-SIZESRCAVG sy-vline 
WA_WLBIDTPSYS_STR-TIMEERRF sy-vline 
WA_WLBIDTPSYS_STR-TIMEERFPCT sy-vline 
WA_WLBIDTPSYS_STR-TIMEERFAVG sy-vline 
WA_WLBIDTPSYS_STR-RECSERRF_S sy-vline 
WA_WLBIDTPSYS_STR-RCSERFSAVG sy-vline 
WA_WLBIDTPSYS_STR-RECSERRF_F sy-vline 
WA_WLBIDTPSYS_STR-RCSERFFAVG sy-vline 
WA_WLBIDTPSYS_STR-SIZEERRF_S sy-vline 
WA_WLBIDTPSYS_STR-SIZERFSAVG sy-vline 
WA_WLBIDTPSYS_STR-SIZEERRF_F sy-vline 
WA_WLBIDTPSYS_STR-SIZERFFAVG sy-vline 
WA_WLBIDTPSYS_STR-TIMETRFN sy-vline 
WA_WLBIDTPSYS_STR-TIMETRFPCT sy-vline 
WA_WLBIDTPSYS_STR-TIMETRFAVG sy-vline 
WA_WLBIDTPSYS_STR-RECSTRFN_S sy-vline 
WA_WLBIDTPSYS_STR-RCSTRFSAVG sy-vline 
WA_WLBIDTPSYS_STR-RECSTRFN_F sy-vline 
WA_WLBIDTPSYS_STR-RCSTRFFAVG sy-vline 
WA_WLBIDTPSYS_STR-SIZETRFN_S sy-vline 
WA_WLBIDTPSYS_STR-SIZTRFSAVG sy-vline 
WA_WLBIDTPSYS_STR-SIZETRFN_F sy-vline 
WA_WLBIDTPSYS_STR-SIZTRFFAVG sy-vline 
WA_WLBIDTPSYS_STR-NUMTRFN sy-vline 
WA_WLBIDTPSYS_STR-AVGTRFN sy-vline 
WA_WLBIDTPSYS_STR-TIMETGT sy-vline 
WA_WLBIDTPSYS_STR-TIMETGTPCT sy-vline 
WA_WLBIDTPSYS_STR-TIMETGTAVG sy-vline 
WA_WLBIDTPSYS_STR-RECSTGT_S sy-vline 
WA_WLBIDTPSYS_STR-RCSTGTSAVG sy-vline 
WA_WLBIDTPSYS_STR-RECSTGT_F sy-vline 
WA_WLBIDTPSYS_STR-RCSTGTFAVG sy-vline 
WA_WLBIDTPSYS_STR-SIZETGT_S sy-vline 
WA_WLBIDTPSYS_STR-SIZTGTSAVG sy-vline 
WA_WLBIDTPSYS_STR-TSTMP_START sy-vline 
WA_WLBIDTPSYS_STR-REQUID sy-vline 
WA_WLBIDTPSYS_STR-REQUEST sy-vline 
WA_WLBIDTPSYS_STR-LOGSYS sy-vline 
WA_WLBIDTPSYS_STR-DTP sy-vline 
WA_WLBIDTPSYS_STR-UNAME sy-vline 
WA_WLBIDTPSYS_STR-USTATE sy-vline 
WA_WLBIDTPSYS_STR-TSTATE sy-vline 
WA_WLBIDTPSYS_STR-TARGETSTATE sy-vline 
WA_WLBIDTPSYS_STR-PROCESSMODE sy-vline 
WA_WLBIDTPSYS_STR-LINECOLOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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