ABAP Select data from SAP table CCM_OS_PERF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CCM_OS_PERF
*  INTO TABLE @DATA(IT_CCM_OS_PERF2).
*--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_CCM_OS_PERF INDEX 1 INTO DATA(WA_CCM_OS_PERF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CCM_OS_PERF>-PERFSUBTYPE = 1.
<CCM_OS_PERF>-DECIMALS = 1.
<CCM_OS_PERF>-UNIT = 1.
<CCM_OS_PERF>-AL_CLASS = 1.
<CCM_OS_PERF>-AL_NO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CCM_OS_PERF-THRESH_G2Y, sy-vline,
  WA_CCM_OS_PERF-THRESH_Y2R, sy-vline,
  WA_CCM_OS_PERF-THRESH_R2Y, sy-vline,
  WA_CCM_OS_PERF-THRESH_Y2G, sy-vline,
  WA_CCM_OS_PERF-SNAP_TOTAL, sy-vline,
  WA_CCM_OS_PERF-SNAP_NUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CCM_OS_PERF 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_CCM_OS_PERF 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_CCM_OS_PERF INTO WA_CCM_OS_PERF.


*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_CCM_OS_PERF_STR, 
PERFSUBTYPE TYPE STRING,
DECIMALS TYPE STRING,
UNIT TYPE STRING,
AL_CLASS TYPE STRING,
AL_NO TYPE STRING,
THRESH_G2Y TYPE STRING,
THRESH_Y2R TYPE STRING,
THRESH_R2Y TYPE STRING,
THRESH_Y2G TYPE STRING,
SNAP_TOTAL TYPE STRING,
SNAP_NUMBER TYPE STRING,
SNAP_TIME_HIGH TYPE STRING,
SNAP_TIME_LOW TYPE STRING,
LMIN_TOTAL TYPE STRING,
LMIN_NUMBER TYPE STRING,
L5MIN_TOTAL TYPE STRING,
L5MIN_NUMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CCM_OS_PERF_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_CCM_OS_PERF_STR-PERFSUBTYPE sy-vline 
WA_CCM_OS_PERF_STR-DECIMALS sy-vline 
WA_CCM_OS_PERF_STR-UNIT sy-vline 
WA_CCM_OS_PERF_STR-AL_CLASS sy-vline 
WA_CCM_OS_PERF_STR-AL_NO sy-vline 
WA_CCM_OS_PERF_STR-THRESH_G2Y sy-vline 
WA_CCM_OS_PERF_STR-THRESH_Y2R sy-vline 
WA_CCM_OS_PERF_STR-THRESH_R2Y sy-vline 
WA_CCM_OS_PERF_STR-THRESH_Y2G sy-vline 
WA_CCM_OS_PERF_STR-SNAP_TOTAL sy-vline 
WA_CCM_OS_PERF_STR-SNAP_NUMBER sy-vline 
WA_CCM_OS_PERF_STR-SNAP_TIME_HIGH sy-vline 
WA_CCM_OS_PERF_STR-SNAP_TIME_LOW sy-vline 
WA_CCM_OS_PERF_STR-LMIN_TOTAL sy-vline 
WA_CCM_OS_PERF_STR-LMIN_NUMBER sy-vline 
WA_CCM_OS_PERF_STR-L5MIN_TOTAL sy-vline 
WA_CCM_OS_PERF_STR-L5MIN_NUMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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