ABAP Select data from SAP table DB6WLM_SC_STATS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6WLM_SC_STATS 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_SC_STATS. 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_SC_STATS 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_SC_STATS TYPE STANDARD TABLE OF DB6WLM_SC_STATS,
      WA_DB6WLM_SC_STATS TYPE DB6WLM_SC_STATS,
      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_SC_STATS> TYPE DB6WLM_SC_STATS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6WLM_SC_STATS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6WLM_SC_STATS
  INTO TABLE IT_DB6WLM_SC_STATS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6WLM_SC_STATS
*  INTO TABLE @DATA(IT_DB6WLM_SC_STATS2).
*--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_SC_STATS INDEX 1 INTO DATA(WA_DB6WLM_SC_STATS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6WLM_SC_STATS ASSIGNING <DB6WLM_SC_STATS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6WLM_SC_STATS>-SNAPSHOT_TIMESTAMP = 1.
<DB6WLM_SC_STATS>-TIME_PERIOD = 1.
<DB6WLM_SC_STATS>-PAR_SC_NAME = 1.
<DB6WLM_SC_STATS>-SC_NAME = 1.
<DB6WLM_SC_STATS>-SC_ID = 1.

ENDLOOP.

LOOP AT IT_DB6WLM_SC_STATS INTO WA_DB6WLM_SC_STATS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6WLM_SC_STATS-DBPARTITIONNUM, sy-vline,
  WA_DB6WLM_SC_STATS-ACT_COMPLETED_TOTAL, sy-vline,
  WA_DB6WLM_SC_STATS-ACT_ABORTED_TOTAL, sy-vline,
  WA_DB6WLM_SC_STATS-ACT_REJECTED_TOTAL, sy-vline,
  WA_DB6WLM_SC_STATS-CONCURRENT_ACT_TOP, sy-vline,
  WA_DB6WLM_SC_STATS-ACT_LIFETIME_TOP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB6WLM_SC_STATS 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_SC_STATS 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_SC_STATS INTO WA_DB6WLM_SC_STATS.


*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_SC_STATS_STR, 
SNAPSHOT_TIMESTAMP TYPE STRING,
TIME_PERIOD TYPE STRING,
PAR_SC_NAME TYPE STRING,
SC_NAME TYPE STRING,
SC_ID TYPE STRING,
DBPARTITIONNUM TYPE STRING,
ACT_COMPLETED_TOTAL TYPE STRING,
ACT_ABORTED_TOTAL TYPE STRING,
ACT_REJECTED_TOTAL TYPE STRING,
CONCURRENT_ACT_TOP TYPE STRING,
ACT_LIFETIME_TOP TYPE STRING,
ACT_LIFETIME_AVG TYPE STRING,
ACT_EXEC_TIME_AVG TYPE STRING,
ACT_QUEUE_TIME_AVG TYPE STRING,
CONCURRENT_CON_TOP TYPE STRING,
COST_ESTIMATE_TOP TYPE STRING,
ROWS_RETURNED_TOP TYPE STRING,
TEMP_TABLESPACE_TOP TYPE STRING,
ACT_EST_COST_AVG TYPE STRING,
ACT_INTERARRIVAL_TIME_AVG TYPE STRING,
ACT_REMAPPED_IN TYPE STRING,
ACT_REMAPPED_OUT TYPE STRING,
ACT_ROWS_READ_TOP TYPE STRING,
AGG_TEMP_TABLESPACE_TOP TYPE STRING,
CONCURRENT_WLO_TOP TYPE STRING,
UOW_TOTAL_TIME_TOP TYPE STRING,
ACT_CPU_TIME_TOP TYPE STRING,
TIME_FMT_FROM TYPE STRING,
TIME_FMT_TO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6WLM_SC_STATS_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_SC_STATS_STR-SNAPSHOT_TIMESTAMP sy-vline 
WA_DB6WLM_SC_STATS_STR-TIME_PERIOD sy-vline 
WA_DB6WLM_SC_STATS_STR-PAR_SC_NAME sy-vline 
WA_DB6WLM_SC_STATS_STR-SC_NAME sy-vline 
WA_DB6WLM_SC_STATS_STR-SC_ID sy-vline 
WA_DB6WLM_SC_STATS_STR-DBPARTITIONNUM sy-vline 
WA_DB6WLM_SC_STATS_STR-ACT_COMPLETED_TOTAL sy-vline 
WA_DB6WLM_SC_STATS_STR-ACT_ABORTED_TOTAL sy-vline 
WA_DB6WLM_SC_STATS_STR-ACT_REJECTED_TOTAL sy-vline 
WA_DB6WLM_SC_STATS_STR-CONCURRENT_ACT_TOP sy-vline 
WA_DB6WLM_SC_STATS_STR-ACT_LIFETIME_TOP sy-vline 
WA_DB6WLM_SC_STATS_STR-ACT_LIFETIME_AVG sy-vline 
WA_DB6WLM_SC_STATS_STR-ACT_EXEC_TIME_AVG sy-vline 
WA_DB6WLM_SC_STATS_STR-ACT_QUEUE_TIME_AVG sy-vline 
WA_DB6WLM_SC_STATS_STR-CONCURRENT_CON_TOP sy-vline 
WA_DB6WLM_SC_STATS_STR-COST_ESTIMATE_TOP sy-vline 
WA_DB6WLM_SC_STATS_STR-ROWS_RETURNED_TOP sy-vline 
WA_DB6WLM_SC_STATS_STR-TEMP_TABLESPACE_TOP sy-vline 
WA_DB6WLM_SC_STATS_STR-ACT_EST_COST_AVG sy-vline 
WA_DB6WLM_SC_STATS_STR-ACT_INTERARRIVAL_TIME_AVG sy-vline 
WA_DB6WLM_SC_STATS_STR-ACT_REMAPPED_IN sy-vline 
WA_DB6WLM_SC_STATS_STR-ACT_REMAPPED_OUT sy-vline 
WA_DB6WLM_SC_STATS_STR-ACT_ROWS_READ_TOP sy-vline 
WA_DB6WLM_SC_STATS_STR-AGG_TEMP_TABLESPACE_TOP sy-vline 
WA_DB6WLM_SC_STATS_STR-CONCURRENT_WLO_TOP sy-vline 
WA_DB6WLM_SC_STATS_STR-UOW_TOTAL_TIME_TOP sy-vline 
WA_DB6WLM_SC_STATS_STR-ACT_CPU_TIME_TOP sy-vline 
WA_DB6WLM_SC_STATS_STR-TIME_FMT_FROM sy-vline 
WA_DB6WLM_SC_STATS_STR-TIME_FMT_TO sy-vline      INTO ld_text SEPARATED BY SPACE.

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