ABAP Select data from SAP table PFCOMMON into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PFCOMMON
*  INTO TABLE @DATA(IT_PFCOMMON2).
*--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_PFCOMMON INDEX 1 INTO DATA(WA_PFCOMMON2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PFCOMMON>-RFCTI = 1.
<PFCOMMON>-RFCCNT = 1.
<PFCOMMON>-HTTPCNT = 1.
<PFCOMMON>-HTTPTIME = 1.
<PFCOMMON>-ROLLKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PFCOMMON-INPUTLEN, sy-vline,
  WA_PFCOMMON-OUTPUTLEN, sy-vline,
  WA_PFCOMMON-MAXROLL, sy-vline,
  WA_PFCOMMON-MAXPAGE, sy-vline,
  WA_PFCOMMON-ROLLINCNT, sy-vline,
  WA_PFCOMMON-ROLLINTI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PFCOMMON 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_PFCOMMON 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_PFCOMMON INTO WA_PFCOMMON.


*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_PFCOMMON_STR, 
RFCTI TYPE STRING,
RFCCNT TYPE STRING,
HTTPCNT TYPE STRING,
HTTPTIME TYPE STRING,
ROLLKEY TYPE STRING,
INPUTLEN TYPE STRING,
OUTPUTLEN TYPE STRING,
MAXROLL TYPE STRING,
MAXPAGE TYPE STRING,
ROLLINCNT TYPE STRING,
ROLLINTI TYPE STRING,
ROLLOUTCNT TYPE STRING,
ROLLOUTTI TYPE STRING,
LOCKCNT TYPE STRING,
LOCKTI TYPE STRING,
READDIRCNT TYPE STRING,
READDIRTI TYPE STRING,
READDIRREC TYPE STRING,
READDIRBUF TYPE STRING,
READSEQCNT TYPE STRING,
READSEQTI TYPE STRING,
READSEQREC TYPE STRING,
READSEQBUF TYPE STRING,
PHYREADCNT TYPE STRING,
INSCNT TYPE STRING,
INSTI TYPE STRING,
INSREC TYPE STRING,
PHYINSCNT TYPE STRING,
UPDCNT TYPE STRING,
UPDTI TYPE STRING,
UPDREC TYPE STRING,
PHYUPDCNT TYPE STRING,
DELCNT TYPE STRING,
DELTI TYPE STRING,
DELREC TYPE STRING,
PHYDELCNT TYPE STRING,
COMMITTI TYPE STRING,
DBPROCCNT TYPE STRING,
DBPROCTI TYPE STRING,
GENERATETI TYPE STRING,
REPLOADTI TYPE STRING,
CUALOADTI TYPE STRING,
DYNPLOADTI TYPE STRING,
SRCLODCNT TYPE STRING,
DSQLCNT TYPE STRING,
QUECNT TYPE STRING,
QUETI TYPE STRING,
DDICTI TYPE STRING,
ACTION_TYPE TYPE STRING,
MEMSUM TYPE STRING,
PRIVSUM TYPE STRING,
USEDBYTES TYPE STRING,
MAXBYTES TYPE STRING,
MAXBYTESDI TYPE STRING,
ADCNT TYPE STRING,
ADTIME TYPE STRING,
ABGC_RUN_COUNT TYPE STRING,
ABGC_TIME TYPE STRING,
ABGC_FREED_OBJS TYPE STRING,
ABGC_ALLOC_OBJS TYPE STRING,
ABGC_CALLED_EXPL TYPE STRING,
WPID TYPE STRING,
DISPCNT TYPE STRING,
TASKTYPE TYPE STRING,
PRIVMODE TYPE STRING,
WPRESTART TYPE STRING,
TABLOAD TYPE STRING,
ACCOUNT TYPE STRING,
CLIENT TYPE STRING,
TRANSID TYPE STRING,
CONTEXT_ID TYPE STRING,
DIALOG_STEP TYPE STRING,
RQ_PRIO TYPE STRING,
SRVCNT TYPE STRING,
SRVTIME TYPE STRING,
CLTCNT TYPE STRING,
CLTTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PFCOMMON_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_PFCOMMON_STR-RFCTI sy-vline 
WA_PFCOMMON_STR-RFCCNT sy-vline 
WA_PFCOMMON_STR-HTTPCNT sy-vline 
WA_PFCOMMON_STR-HTTPTIME sy-vline 
WA_PFCOMMON_STR-ROLLKEY sy-vline 
WA_PFCOMMON_STR-INPUTLEN sy-vline 
WA_PFCOMMON_STR-OUTPUTLEN sy-vline 
WA_PFCOMMON_STR-MAXROLL sy-vline 
WA_PFCOMMON_STR-MAXPAGE sy-vline 
WA_PFCOMMON_STR-ROLLINCNT sy-vline 
WA_PFCOMMON_STR-ROLLINTI sy-vline 
WA_PFCOMMON_STR-ROLLOUTCNT sy-vline 
WA_PFCOMMON_STR-ROLLOUTTI sy-vline 
WA_PFCOMMON_STR-LOCKCNT sy-vline 
WA_PFCOMMON_STR-LOCKTI sy-vline 
WA_PFCOMMON_STR-READDIRCNT sy-vline 
WA_PFCOMMON_STR-READDIRTI sy-vline 
WA_PFCOMMON_STR-READDIRREC sy-vline 
WA_PFCOMMON_STR-READDIRBUF sy-vline 
WA_PFCOMMON_STR-READSEQCNT sy-vline 
WA_PFCOMMON_STR-READSEQTI sy-vline 
WA_PFCOMMON_STR-READSEQREC sy-vline 
WA_PFCOMMON_STR-READSEQBUF sy-vline 
WA_PFCOMMON_STR-PHYREADCNT sy-vline 
WA_PFCOMMON_STR-INSCNT sy-vline 
WA_PFCOMMON_STR-INSTI sy-vline 
WA_PFCOMMON_STR-INSREC sy-vline 
WA_PFCOMMON_STR-PHYINSCNT sy-vline 
WA_PFCOMMON_STR-UPDCNT sy-vline 
WA_PFCOMMON_STR-UPDTI sy-vline 
WA_PFCOMMON_STR-UPDREC sy-vline 
WA_PFCOMMON_STR-PHYUPDCNT sy-vline 
WA_PFCOMMON_STR-DELCNT sy-vline 
WA_PFCOMMON_STR-DELTI sy-vline 
WA_PFCOMMON_STR-DELREC sy-vline 
WA_PFCOMMON_STR-PHYDELCNT sy-vline 
WA_PFCOMMON_STR-COMMITTI sy-vline 
WA_PFCOMMON_STR-DBPROCCNT sy-vline 
WA_PFCOMMON_STR-DBPROCTI sy-vline 
WA_PFCOMMON_STR-GENERATETI sy-vline 
WA_PFCOMMON_STR-REPLOADTI sy-vline 
WA_PFCOMMON_STR-CUALOADTI sy-vline 
WA_PFCOMMON_STR-DYNPLOADTI sy-vline 
WA_PFCOMMON_STR-SRCLODCNT sy-vline 
WA_PFCOMMON_STR-DSQLCNT sy-vline 
WA_PFCOMMON_STR-QUECNT sy-vline 
WA_PFCOMMON_STR-QUETI sy-vline 
WA_PFCOMMON_STR-DDICTI sy-vline 
WA_PFCOMMON_STR-ACTION_TYPE sy-vline 
WA_PFCOMMON_STR-MEMSUM sy-vline 
WA_PFCOMMON_STR-PRIVSUM sy-vline 
WA_PFCOMMON_STR-USEDBYTES sy-vline 
WA_PFCOMMON_STR-MAXBYTES sy-vline 
WA_PFCOMMON_STR-MAXBYTESDI sy-vline 
WA_PFCOMMON_STR-ADCNT sy-vline 
WA_PFCOMMON_STR-ADTIME sy-vline 
WA_PFCOMMON_STR-ABGC_RUN_COUNT sy-vline 
WA_PFCOMMON_STR-ABGC_TIME sy-vline 
WA_PFCOMMON_STR-ABGC_FREED_OBJS sy-vline 
WA_PFCOMMON_STR-ABGC_ALLOC_OBJS sy-vline 
WA_PFCOMMON_STR-ABGC_CALLED_EXPL sy-vline 
WA_PFCOMMON_STR-WPID sy-vline 
WA_PFCOMMON_STR-DISPCNT sy-vline 
WA_PFCOMMON_STR-TASKTYPE sy-vline 
WA_PFCOMMON_STR-PRIVMODE sy-vline 
WA_PFCOMMON_STR-WPRESTART sy-vline 
WA_PFCOMMON_STR-TABLOAD sy-vline 
WA_PFCOMMON_STR-ACCOUNT sy-vline 
WA_PFCOMMON_STR-CLIENT sy-vline 
WA_PFCOMMON_STR-TRANSID sy-vline 
WA_PFCOMMON_STR-CONTEXT_ID sy-vline 
WA_PFCOMMON_STR-DIALOG_STEP sy-vline 
WA_PFCOMMON_STR-RQ_PRIO sy-vline 
WA_PFCOMMON_STR-SRVCNT sy-vline 
WA_PFCOMMON_STR-SRVTIME sy-vline 
WA_PFCOMMON_STR-CLTCNT sy-vline 
WA_PFCOMMON_STR-CLTTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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