ABAP Select data from SAP table SAPWLUSWL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SAPWLUSWL
*  INTO TABLE @DATA(IT_SAPWLUSWL2).
*--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_SAPWLUSWL INDEX 1 INTO DATA(WA_SAPWLUSWL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SAPWLUSWL>-MANDT = 1.
<SAPWLUSWL>-USERNAME = 1.
<SAPWLUSWL>-ACCOUNT = 1.
<SAPWLUSWL>-COUNT = 1.
<SAPWLUSWL>-DCOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SAPWLUSWL-UCOUNT, sy-vline,
  WA_SAPWLUSWL-BCOUNT, sy-vline,
  WA_SAPWLUSWL-SCOUNT, sy-vline,
  WA_SAPWLUSWL-RESPTI, sy-vline,
  WA_SAPWLUSWL-CPUTI, sy-vline,
  WA_SAPWLUSWL-QUEUETI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SAPWLUSWL 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_SAPWLUSWL 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_SAPWLUSWL INTO WA_SAPWLUSWL.


*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_SAPWLUSWL_STR, 
MANDT TYPE STRING,
USERNAME TYPE STRING,
ACCOUNT TYPE STRING,
COUNT TYPE STRING,
DCOUNT TYPE STRING,
UCOUNT TYPE STRING,
BCOUNT TYPE STRING,
SCOUNT TYPE STRING,
RESPTI TYPE STRING,
CPUTI TYPE STRING,
QUEUETI TYPE STRING,
VALUE_0 TYPE STRING,
VALUE_1 TYPE STRING,
VALUE_2 TYPE STRING,
VALUE_3 TYPE STRING,
VALUE_4 TYPE STRING,
VALUE_5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SAPWLUSWL_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_SAPWLUSWL_STR-MANDT sy-vline 
WA_SAPWLUSWL_STR-USERNAME sy-vline 
WA_SAPWLUSWL_STR-ACCOUNT sy-vline 
WA_SAPWLUSWL_STR-COUNT sy-vline 
WA_SAPWLUSWL_STR-DCOUNT sy-vline 
WA_SAPWLUSWL_STR-UCOUNT sy-vline 
WA_SAPWLUSWL_STR-BCOUNT sy-vline 
WA_SAPWLUSWL_STR-SCOUNT sy-vline 
WA_SAPWLUSWL_STR-RESPTI sy-vline 
WA_SAPWLUSWL_STR-CPUTI sy-vline 
WA_SAPWLUSWL_STR-QUEUETI sy-vline 
WA_SAPWLUSWL_STR-VALUE_0 sy-vline 
WA_SAPWLUSWL_STR-VALUE_1 sy-vline 
WA_SAPWLUSWL_STR-VALUE_2 sy-vline 
WA_SAPWLUSWL_STR-VALUE_3 sy-vline 
WA_SAPWLUSWL_STR-VALUE_4 sy-vline 
WA_SAPWLUSWL_STR-VALUE_5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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