ABAP Select data from SAP table SAPWLHITL2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SAPWLHITL2 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 SAPWLHITL2. 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 SAPWLHITL2 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_SAPWLHITL2 TYPE STANDARD TABLE OF SAPWLHITL2,
      WA_SAPWLHITL2 TYPE SAPWLHITL2,
      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: <SAPWLHITL2> TYPE SAPWLHITL2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SAPWLHITL2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SAPWLHITL2
  INTO TABLE IT_SAPWLHITL2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SAPWLHITL2
*  INTO TABLE @DATA(IT_SAPWLHITL22).
*--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_SAPWLHITL2 INDEX 1 INTO DATA(WA_SAPWLHITL22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SAPWLHITL2 ASSIGNING <SAPWLHITL2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SAPWLHITL2>-RECDATE = 1.
<SAPWLHITL2>-RECTIME = 1.
<SAPWLHITL2>-TCODE = 1.
<SAPWLHITL2>-REPORT = 1.
<SAPWLHITL2>-TASKNAME = 1.

ENDLOOP.

LOOP AT IT_SAPWLHITL2 INTO WA_SAPWLHITL2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SAPWLHITL2-SCREEN, sy-vline,
  WA_SAPWLHITL2-WPNUMBER, sy-vline,
  WA_SAPWLHITL2-USERNAM, sy-vline,
  WA_SAPWLHITL2-FCODE, sy-vline,
  WA_SAPWLHITL2-IKEY, sy-vline,
  WA_SAPWLHITL2-OKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SAPWLHITL2 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_SAPWLHITL2 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_SAPWLHITL2 INTO WA_SAPWLHITL2.


*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_SAPWLHITL2_STR, 
RECDATE TYPE STRING,
RECTIME TYPE STRING,
TCODE TYPE STRING,
REPORT TYPE STRING,
TASKNAME TYPE STRING,
SCREEN TYPE STRING,
WPNUMBER TYPE STRING,
USERNAM TYPE STRING,
FCODE TYPE STRING,
IKEY TYPE STRING,
OKEY TYPE STRING,
TEXT TYPE STRING,
TECHTEXT TYPE STRING,
DBREQUEST TYPE STRING,
RESPTI TYPE STRING,
PROCTI TYPE STRING,
WAITTI TYPE STRING,
CPUTI TYPE STRING,
ROLLWAITTI TYPE STRING,
DBTI TYPE STRING,
LOADTI TYPE STRING,
BYTES TYPE STRING,
PHYCHNGCNT TYPE STRING,
SREADTI TYPE STRING,
SREADCNT TYPE STRING,
DREADTI TYPE STRING,
DREADCNT TYPE STRING,
CHNGTI TYPE STRING,
CHNGCNT TYPE STRING,
DBPCOUNT TYPE STRING,
DBPTIME TYPE STRING,
APPLINFO TYPE STRING,
VMC_CALLCOUNT TYPE STRING,
VMC_CPUTIME TYPE STRING,
VMC_ELAPTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SAPWLHITL2_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_SAPWLHITL2_STR-RECDATE sy-vline 
WA_SAPWLHITL2_STR-RECTIME sy-vline 
WA_SAPWLHITL2_STR-TCODE sy-vline 
WA_SAPWLHITL2_STR-REPORT sy-vline 
WA_SAPWLHITL2_STR-TASKNAME sy-vline 
WA_SAPWLHITL2_STR-SCREEN sy-vline 
WA_SAPWLHITL2_STR-WPNUMBER sy-vline 
WA_SAPWLHITL2_STR-USERNAM sy-vline 
WA_SAPWLHITL2_STR-FCODE sy-vline 
WA_SAPWLHITL2_STR-IKEY sy-vline 
WA_SAPWLHITL2_STR-OKEY sy-vline 
WA_SAPWLHITL2_STR-TEXT sy-vline 
WA_SAPWLHITL2_STR-TECHTEXT sy-vline 
WA_SAPWLHITL2_STR-DBREQUEST sy-vline 
WA_SAPWLHITL2_STR-RESPTI sy-vline 
WA_SAPWLHITL2_STR-PROCTI sy-vline 
WA_SAPWLHITL2_STR-WAITTI sy-vline 
WA_SAPWLHITL2_STR-CPUTI sy-vline 
WA_SAPWLHITL2_STR-ROLLWAITTI sy-vline 
WA_SAPWLHITL2_STR-DBTI sy-vline 
WA_SAPWLHITL2_STR-LOADTI sy-vline 
WA_SAPWLHITL2_STR-BYTES sy-vline 
WA_SAPWLHITL2_STR-PHYCHNGCNT sy-vline 
WA_SAPWLHITL2_STR-SREADTI sy-vline 
WA_SAPWLHITL2_STR-SREADCNT sy-vline 
WA_SAPWLHITL2_STR-DREADTI sy-vline 
WA_SAPWLHITL2_STR-DREADCNT sy-vline 
WA_SAPWLHITL2_STR-CHNGTI sy-vline 
WA_SAPWLHITL2_STR-CHNGCNT sy-vline 
WA_SAPWLHITL2_STR-DBPCOUNT sy-vline 
WA_SAPWLHITL2_STR-DBPTIME sy-vline 
WA_SAPWLHITL2_STR-APPLINFO sy-vline 
WA_SAPWLHITL2_STR-VMC_CALLCOUNT sy-vline 
WA_SAPWLHITL2_STR-VMC_CPUTIME sy-vline 
WA_SAPWLHITL2_STR-VMC_ELAPTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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