ABAP Select data from SAP table SAPWLTIME0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SAPWLTIME0 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 SAPWLTIME0. 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 SAPWLTIME0 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_SAPWLTIME0 TYPE STANDARD TABLE OF SAPWLTIME0,
      WA_SAPWLTIME0 TYPE SAPWLTIME0,
      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: <SAPWLTIME0> TYPE SAPWLTIME0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SAPWLTIME0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SAPWLTIME0
  INTO TABLE IT_SAPWLTIME0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SAPWLTIME0
*  INTO TABLE @DATA(IT_SAPWLTIME02).
*--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_SAPWLTIME0 INDEX 1 INTO DATA(WA_SAPWLTIME02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SAPWLTIME0 ASSIGNING <SAPWLTIME0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SAPWLTIME0>-TIME = 1.
<SAPWLTIME0>-DIASTEPCNT = 1.
<SAPWLTIME0>-RESPST = 1.
<SAPWLTIME0>-RESPMT = 1.
<SAPWLTIME0>-CPUST = 1.

ENDLOOP.

LOOP AT IT_SAPWLTIME0 INTO WA_SAPWLTIME0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SAPWLTIME0-CPUMT, sy-vline,
  WA_SAPWLTIME0-DBST, sy-vline,
  WA_SAPWLTIME0-DBMT, sy-vline,
  WA_SAPWLTIME0-WAITST, sy-vline,
  WA_SAPWLTIME0-WAITMT, sy-vline,
  WA_SAPWLTIME0-FNETMT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SAPWLTIME0 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_SAPWLTIME0 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_SAPWLTIME0 INTO WA_SAPWLTIME0.


*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_SAPWLTIME0_STR, 
TIME TYPE STRING,
DIASTEPCNT TYPE STRING,
RESPST TYPE STRING,
RESPMT TYPE STRING,
CPUST TYPE STRING,
CPUMT TYPE STRING,
DBST TYPE STRING,
DBMT TYPE STRING,
WAITST TYPE STRING,
WAITMT TYPE STRING,
FNETMT TYPE STRING,
FGUIMT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SAPWLTIME0_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_SAPWLTIME0_STR-TIME sy-vline 
WA_SAPWLTIME0_STR-DIASTEPCNT sy-vline 
WA_SAPWLTIME0_STR-RESPST sy-vline 
WA_SAPWLTIME0_STR-RESPMT sy-vline 
WA_SAPWLTIME0_STR-CPUST sy-vline 
WA_SAPWLTIME0_STR-CPUMT sy-vline 
WA_SAPWLTIME0_STR-DBST sy-vline 
WA_SAPWLTIME0_STR-DBMT sy-vline 
WA_SAPWLTIME0_STR-WAITST sy-vline 
WA_SAPWLTIME0_STR-WAITMT sy-vline 
WA_SAPWLTIME0_STR-FNETMT sy-vline 
WA_SAPWLTIME0_STR-FGUIMT sy-vline      INTO ld_text SEPARATED BY SPACE.

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