ABAP Select data from SAP table BDLDWLTSK1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BDLDWLTSK1 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 BDLDWLTSK1. 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 BDLDWLTSK1 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_BDLDWLTSK1 TYPE STANDARD TABLE OF BDLDWLTSK1,
      WA_BDLDWLTSK1 TYPE BDLDWLTSK1,
      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: <BDLDWLTSK1> TYPE BDLDWLTSK1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BDLDWLTSK1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BDLDWLTSK1
  INTO TABLE IT_BDLDWLTSK1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BDLDWLTSK1
*  INTO TABLE @DATA(IT_BDLDWLTSK12).
*--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_BDLDWLTSK1 INDEX 1 INTO DATA(WA_BDLDWLTSK12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BDLDWLTSK1 ASSIGNING <BDLDWLTSK1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BDLDWLTSK1>-DATE = 1.
<BDLDWLTSK1>-HOSTID = 1.
<BDLDWLTSK1>-TASKTYPE = 1.
<BDLDWLTSK1>-TIME = 1.
<BDLDWLTSK1>-COUNT = 1.

ENDLOOP.

LOOP AT IT_BDLDWLTSK1 INTO WA_BDLDWLTSK1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BDLDWLTSK1-RESPTI, sy-vline,
  WA_BDLDWLTSK1-CPUTI, sy-vline,
  WA_BDLDWLTSK1-QUEUETI, sy-vline,
  WA_BDLDWLTSK1-READDIRCNT, sy-vline,
  WA_BDLDWLTSK1-READDIRTI, sy-vline,
  WA_BDLDWLTSK1-READDIRBUF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BDLDWLTSK1 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_BDLDWLTSK1 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_BDLDWLTSK1 INTO WA_BDLDWLTSK1.


*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_BDLDWLTSK1_STR, 
DATE TYPE STRING,
HOSTID TYPE STRING,
TASKTYPE TYPE STRING,
TIME TYPE STRING,
COUNT TYPE STRING,
RESPTI TYPE STRING,
CPUTI TYPE STRING,
QUEUETI TYPE STRING,
READDIRCNT TYPE STRING,
READDIRTI TYPE STRING,
READDIRBUF TYPE STRING,
READSEQCNT TYPE STRING,
READSEQTI TYPE STRING,
PHYREADCNT TYPE STRING,
CHNGCNT TYPE STRING,
CHNGTI TYPE STRING,
PHYCHNGREC TYPE STRING,
CNT001 TYPE STRING,
CNT002 TYPE STRING,
CNT003 TYPE STRING,
CNT004 TYPE STRING,
CNT005 TYPE STRING,
CNT006 TYPE STRING,
CNT007 TYPE STRING,
CNT008 TYPE STRING,
CNT009 TYPE STRING,
DBP_COUNT TYPE STRING,
DBP_TIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BDLDWLTSK1_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_BDLDWLTSK1_STR-DATE sy-vline 
WA_BDLDWLTSK1_STR-HOSTID sy-vline 
WA_BDLDWLTSK1_STR-TASKTYPE sy-vline 
WA_BDLDWLTSK1_STR-TIME sy-vline 
WA_BDLDWLTSK1_STR-COUNT sy-vline 
WA_BDLDWLTSK1_STR-RESPTI sy-vline 
WA_BDLDWLTSK1_STR-CPUTI sy-vline 
WA_BDLDWLTSK1_STR-QUEUETI sy-vline 
WA_BDLDWLTSK1_STR-READDIRCNT sy-vline 
WA_BDLDWLTSK1_STR-READDIRTI sy-vline 
WA_BDLDWLTSK1_STR-READDIRBUF sy-vline 
WA_BDLDWLTSK1_STR-READSEQCNT sy-vline 
WA_BDLDWLTSK1_STR-READSEQTI sy-vline 
WA_BDLDWLTSK1_STR-PHYREADCNT sy-vline 
WA_BDLDWLTSK1_STR-CHNGCNT sy-vline 
WA_BDLDWLTSK1_STR-CHNGTI sy-vline 
WA_BDLDWLTSK1_STR-PHYCHNGREC sy-vline 
WA_BDLDWLTSK1_STR-CNT001 sy-vline 
WA_BDLDWLTSK1_STR-CNT002 sy-vline 
WA_BDLDWLTSK1_STR-CNT003 sy-vline 
WA_BDLDWLTSK1_STR-CNT004 sy-vline 
WA_BDLDWLTSK1_STR-CNT005 sy-vline 
WA_BDLDWLTSK1_STR-CNT006 sy-vline 
WA_BDLDWLTSK1_STR-CNT007 sy-vline 
WA_BDLDWLTSK1_STR-CNT008 sy-vline 
WA_BDLDWLTSK1_STR-CNT009 sy-vline 
WA_BDLDWLTSK1_STR-DBP_COUNT sy-vline 
WA_BDLDWLTSK1_STR-DBP_TIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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