ABAP Select data from SAP table DB6WLM_WLOCCACT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6WLM_WLOCCACT 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 DB6WLM_WLOCCACT. 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 DB6WLM_WLOCCACT 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_DB6WLM_WLOCCACT TYPE STANDARD TABLE OF DB6WLM_WLOCCACT,
      WA_DB6WLM_WLOCCACT TYPE DB6WLM_WLOCCACT,
      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: <DB6WLM_WLOCCACT> TYPE DB6WLM_WLOCCACT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6WLM_WLOCCACT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6WLM_WLOCCACT
  INTO TABLE IT_DB6WLM_WLOCCACT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6WLM_WLOCCACT
*  INTO TABLE @DATA(IT_DB6WLM_WLOCCACT2).
*--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_DB6WLM_WLOCCACT INDEX 1 INTO DATA(WA_DB6WLM_WLOCCACT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6WLM_WLOCCACT ASSIGNING <DB6WLM_WLOCCACT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6WLM_WLOCCACT>-COORD_MEMBER_IMAGE = 1.
<DB6WLM_WLOCCACT>-MEMBER_IMAGE = 1.
<DB6WLM_WLOCCACT>-APPLICATION_HANDLE = 1.
<DB6WLM_WLOCCACT>-DBPARTITIONNUM = 1.
<DB6WLM_WLOCCACT>-COORD_PARTITION_NUM = 1.

ENDLOOP.

LOOP AT IT_DB6WLM_WLOCCACT INTO WA_DB6WLM_WLOCCACT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6WLM_WLOCCACT-LOCAL_START_TIME, sy-vline,
  WA_DB6WLM_WLOCCACT-UOW_ID, sy-vline,
  WA_DB6WLM_WLOCCACT-ACTIVITY_ID, sy-vline,
  WA_DB6WLM_WLOCCACT-PARENT_UOW_ID, sy-vline,
  WA_DB6WLM_WLOCCACT-PARENT_ACTIVITY_ID, sy-vline,
  WA_DB6WLM_WLOCCACT-ACTIVITY_STATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB6WLM_WLOCCACT 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_DB6WLM_WLOCCACT 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_DB6WLM_WLOCCACT INTO WA_DB6WLM_WLOCCACT.


*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_DB6WLM_WLOCCACT_STR, 
COORD_MEMBER_IMAGE TYPE STRING,
MEMBER_IMAGE TYPE STRING,
APPLICATION_HANDLE TYPE STRING,
DBPARTITIONNUM TYPE STRING,
COORD_PARTITION_NUM TYPE STRING,
LOCAL_START_TIME TYPE STRING,
UOW_ID TYPE STRING,
ACTIVITY_ID TYPE STRING,
PARENT_UOW_ID TYPE STRING,
PARENT_ACTIVITY_ID TYPE STRING,
ACTIVITY_STATE TYPE STRING,
ACTIVITY_TYPE TYPE STRING,
NESTING_LEVEL TYPE STRING,
INVOCATION_ID TYPE STRING,
ROUTINE_ID TYPE STRING,
UTILITY_ID TYPE STRING,
SERVICE_CLASS_ID TYPE STRING,
DATABASE_WORK_ACTION_SET_ID TYPE STRING,
DATABASE_WORK_CLASS_ID TYPE STRING,
SC_WORK_ACTION_SET_ID TYPE STRING,
SC_WORK_CLASS_ID TYPE STRING,
EXECUTABLE_ID TYPE STRING,
TOTAL_CPU_TIME TYPE STRING,
ROWS_READ TYPE STRING,
ROWS_RETURNED TYPE STRING,
QUERY_COST_ESTIMATE TYPE STRING,
DIRECT_READS TYPE STRING,
DIRECT_WRITES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6WLM_WLOCCACT_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_DB6WLM_WLOCCACT_STR-COORD_MEMBER_IMAGE sy-vline 
WA_DB6WLM_WLOCCACT_STR-MEMBER_IMAGE sy-vline 
WA_DB6WLM_WLOCCACT_STR-APPLICATION_HANDLE sy-vline 
WA_DB6WLM_WLOCCACT_STR-DBPARTITIONNUM sy-vline 
WA_DB6WLM_WLOCCACT_STR-COORD_PARTITION_NUM sy-vline 
WA_DB6WLM_WLOCCACT_STR-LOCAL_START_TIME sy-vline 
WA_DB6WLM_WLOCCACT_STR-UOW_ID sy-vline 
WA_DB6WLM_WLOCCACT_STR-ACTIVITY_ID sy-vline 
WA_DB6WLM_WLOCCACT_STR-PARENT_UOW_ID sy-vline 
WA_DB6WLM_WLOCCACT_STR-PARENT_ACTIVITY_ID sy-vline 
WA_DB6WLM_WLOCCACT_STR-ACTIVITY_STATE sy-vline 
WA_DB6WLM_WLOCCACT_STR-ACTIVITY_TYPE sy-vline 
WA_DB6WLM_WLOCCACT_STR-NESTING_LEVEL sy-vline 
WA_DB6WLM_WLOCCACT_STR-INVOCATION_ID sy-vline 
WA_DB6WLM_WLOCCACT_STR-ROUTINE_ID sy-vline 
WA_DB6WLM_WLOCCACT_STR-UTILITY_ID sy-vline 
WA_DB6WLM_WLOCCACT_STR-SERVICE_CLASS_ID sy-vline 
WA_DB6WLM_WLOCCACT_STR-DATABASE_WORK_ACTION_SET_ID sy-vline 
WA_DB6WLM_WLOCCACT_STR-DATABASE_WORK_CLASS_ID sy-vline 
WA_DB6WLM_WLOCCACT_STR-SC_WORK_ACTION_SET_ID sy-vline 
WA_DB6WLM_WLOCCACT_STR-SC_WORK_CLASS_ID sy-vline 
WA_DB6WLM_WLOCCACT_STR-EXECUTABLE_ID sy-vline 
WA_DB6WLM_WLOCCACT_STR-TOTAL_CPU_TIME sy-vline 
WA_DB6WLM_WLOCCACT_STR-ROWS_READ sy-vline 
WA_DB6WLM_WLOCCACT_STR-ROWS_RETURNED sy-vline 
WA_DB6WLM_WLOCCACT_STR-QUERY_COST_ESTIMATE sy-vline 
WA_DB6WLM_WLOCCACT_STR-DIRECT_READS sy-vline 
WA_DB6WLM_WLOCCACT_STR-DIRECT_WRITES sy-vline      INTO ld_text SEPARATED BY SPACE.

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