ABAP Select data from SAP table /SDF/MON_HEADER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SDF/MON_HEADER 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 /SDF/MON_HEADER. 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 /SDF/MON_HEADER 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_/SDF/MON_HEADER TYPE STANDARD TABLE OF /SDF/MON_HEADER,
      WA_/SDF/MON_HEADER TYPE /SDF/MON_HEADER,
      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: </SDF/MON_HEADER> TYPE /SDF/MON_HEADER.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SDF/MON_HEADER
  INTO TABLE IT_/SDF/MON_HEADER.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SDF/MON_HEADER
*  INTO TABLE @DATA(IT_/SDF/MON_HEADER2).
*--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_/SDF/MON_HEADER INDEX 1 INTO DATA(WA_/SDF/MON_HEADER2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SDF/MON_HEADER ASSIGNING </SDF/MON_HEADER>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SDF/MON_HEADER>-ANALYSIS_GUID = 1.
</SDF/MON_HEADER>-DATUM = 1.
</SDF/MON_HEADER>-TIME = 1.
</SDF/MON_HEADER>-SERVER = 1.
</SDF/MON_HEADER>-ACT_WPS = 1.

ENDLOOP.

LOOP AT IT_/SDF/MON_HEADER INTO WA_/SDF/MON_HEADER.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SDF/MON_HEADER-ACT_DIA, sy-vline,
  WA_/SDF/MON_HEADER-TRFC_FREE, sy-vline,
  WA_/SDF/MON_HEADER-USR_TOTAL, sy-vline,
  WA_/SDF/MON_HEADER-SYS_TOTAL, sy-vline,
  WA_/SDF/MON_HEADER-IDLE_TOTAL, sy-vline,
  WA_/SDF/MON_HEADER-IN_KB_SEC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SDF/MON_HEADER 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_/SDF/MON_HEADER 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_/SDF/MON_HEADER INTO WA_/SDF/MON_HEADER.


*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_/SDF/MON_HEADER_STR, 
ANALYSIS_GUID TYPE STRING,
DATUM TYPE STRING,
TIME TYPE STRING,
SERVER TYPE STRING,
ACT_WPS TYPE STRING,
ACT_DIA TYPE STRING,
TRFC_FREE TYPE STRING,
USR_TOTAL TYPE STRING,
SYS_TOTAL TYPE STRING,
IDLE_TOTAL TYPE STRING,
IN_KB_SEC TYPE STRING,
OUT_KB_SEC TYPE STRING,
FREE_MEM TYPE STRING,
EMALLOC TYPE STRING,
EMATTACH TYPE STRING,
EMGLOBALKB TYPE STRING,
HEAPSUMKB TYPE STRING,
PRIVWPNO TYPE STRING,
PAGESHMKB TYPE STRING,
ROLLSHMKB TYPE STRING,
DIAQ TYPE STRING,
UPDQ TYPE STRING,
ENQQ TYPE STRING,
SM50_FLAG TYPE STRING,
QUEUE_FLAG TYPE STRING,
ST06_FLAG TYPE STRING,
TOPCPU_FLAG TYPE STRING,
ST02_FLAG TYPE STRING,
SM04_FLAG TYPE STRING,
SM12_CNT TYPE STRING,
SM12_FLAG TYPE STRING,
SM12_STAT_FLAG TYPE STRING,
QINLENGTH TYPE STRING,
QIN_FLAG TYPE STRING,
QOUTLENGTH TYPE STRING,
QOUT_FLAG TYPE STRING,
USERS TYPE STRING,
SESSIONS TYPE STRING,
AVAILCPUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SDF/MON_HEADER_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_/SDF/MON_HEADER_STR-ANALYSIS_GUID sy-vline 
WA_/SDF/MON_HEADER_STR-DATUM sy-vline 
WA_/SDF/MON_HEADER_STR-TIME sy-vline 
WA_/SDF/MON_HEADER_STR-SERVER sy-vline 
WA_/SDF/MON_HEADER_STR-ACT_WPS sy-vline 
WA_/SDF/MON_HEADER_STR-ACT_DIA sy-vline 
WA_/SDF/MON_HEADER_STR-TRFC_FREE sy-vline 
WA_/SDF/MON_HEADER_STR-USR_TOTAL sy-vline 
WA_/SDF/MON_HEADER_STR-SYS_TOTAL sy-vline 
WA_/SDF/MON_HEADER_STR-IDLE_TOTAL sy-vline 
WA_/SDF/MON_HEADER_STR-IN_KB_SEC sy-vline 
WA_/SDF/MON_HEADER_STR-OUT_KB_SEC sy-vline 
WA_/SDF/MON_HEADER_STR-FREE_MEM sy-vline 
WA_/SDF/MON_HEADER_STR-EMALLOC sy-vline 
WA_/SDF/MON_HEADER_STR-EMATTACH sy-vline 
WA_/SDF/MON_HEADER_STR-EMGLOBALKB sy-vline 
WA_/SDF/MON_HEADER_STR-HEAPSUMKB sy-vline 
WA_/SDF/MON_HEADER_STR-PRIVWPNO sy-vline 
WA_/SDF/MON_HEADER_STR-PAGESHMKB sy-vline 
WA_/SDF/MON_HEADER_STR-ROLLSHMKB sy-vline 
WA_/SDF/MON_HEADER_STR-DIAQ sy-vline 
WA_/SDF/MON_HEADER_STR-UPDQ sy-vline 
WA_/SDF/MON_HEADER_STR-ENQQ sy-vline 
WA_/SDF/MON_HEADER_STR-SM50_FLAG sy-vline 
WA_/SDF/MON_HEADER_STR-QUEUE_FLAG sy-vline 
WA_/SDF/MON_HEADER_STR-ST06_FLAG sy-vline 
WA_/SDF/MON_HEADER_STR-TOPCPU_FLAG sy-vline 
WA_/SDF/MON_HEADER_STR-ST02_FLAG sy-vline 
WA_/SDF/MON_HEADER_STR-SM04_FLAG sy-vline 
WA_/SDF/MON_HEADER_STR-SM12_CNT sy-vline 
WA_/SDF/MON_HEADER_STR-SM12_FLAG sy-vline 
WA_/SDF/MON_HEADER_STR-SM12_STAT_FLAG sy-vline 
WA_/SDF/MON_HEADER_STR-QINLENGTH sy-vline 
WA_/SDF/MON_HEADER_STR-QIN_FLAG sy-vline 
WA_/SDF/MON_HEADER_STR-QOUTLENGTH sy-vline 
WA_/SDF/MON_HEADER_STR-QOUT_FLAG sy-vline 
WA_/SDF/MON_HEADER_STR-USERS sy-vline 
WA_/SDF/MON_HEADER_STR-SESSIONS sy-vline 
WA_/SDF/MON_HEADER_STR-AVAILCPUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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