ABAP Select data from SAP table PFLOG2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PFLOG2 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 PFLOG2. 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 PFLOG2 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_PFLOG2 TYPE STANDARD TABLE OF PFLOG2,
      WA_PFLOG2 TYPE PFLOG2,
      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: <PFLOG2> TYPE PFLOG2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PFLOG2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PFLOG2
  INTO TABLE IT_PFLOG2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PFLOG2
*  INTO TABLE @DATA(IT_PFLOG22).
*--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_PFLOG2 INDEX 1 INTO DATA(WA_PFLOG22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PFLOG2 ASSIGNING <PFLOG2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PFLOG2>-MANDT = 1.
<PFLOG2>-LOGSYS = 1.
<PFLOG2>-TIMESTMP = 1.
<PFLOG2>-STATUS = 1.
<PFLOG2>-ACTION = 1.

ENDLOOP.

LOOP AT IT_PFLOG2 INTO WA_PFLOG2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PFLOG2-DURATION, sy-vline,
  WA_PFLOG2-INCL_TEST, sy-vline,
  WA_PFLOG2-SELART, sy-vline,
  WA_PFLOG2-FUNCTION, sy-vline,
  WA_PFLOG2-ACTIVITY, sy-vline,
  WA_PFLOG2-REPID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PFLOG2 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_PFLOG2 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_PFLOG2 INTO WA_PFLOG2.


*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.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PFLOG2-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PFLOG2-LOGSYS.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PFLOG2_STR, 
MANDT TYPE STRING,
LOGSYS TYPE STRING,
TIMESTMP TYPE STRING,
STATUS TYPE STRING,
ACTION TYPE STRING,
DURATION TYPE STRING,
INCL_TEST TYPE STRING,
SELART TYPE STRING,
FUNCTION TYPE STRING,
ACTIVITY TYPE STRING,
REPID TYPE STRING,
VARIANT TYPE STRING,
TCODE TYPE STRING,
USERNAME TYPE STRING,
TEST TYPE STRING,
BTCFLG TYPE STRING,
SWPFLG TYPE STRING,
SELFLG TYPE STRING,
PARFLG TYPE STRING,
EXPANDER TYPE STRING,
JOBNAME TYPE STRING,
STARTDATE TYPE STRING,
STARTTIME TYPE STRING,
STATUS_ICON TYPE STRING,
LOCK_ICON TYPE STRING,
TEST_ICON TYPE STRING,
SWP_ICON TYPE STRING,
SEL_ICON TYPE STRING,
NODEKEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PFLOG2_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_PFLOG2_STR-MANDT sy-vline 
WA_PFLOG2_STR-LOGSYS sy-vline 
WA_PFLOG2_STR-TIMESTMP sy-vline 
WA_PFLOG2_STR-STATUS sy-vline 
WA_PFLOG2_STR-ACTION sy-vline 
WA_PFLOG2_STR-DURATION sy-vline 
WA_PFLOG2_STR-INCL_TEST sy-vline 
WA_PFLOG2_STR-SELART sy-vline 
WA_PFLOG2_STR-FUNCTION sy-vline 
WA_PFLOG2_STR-ACTIVITY sy-vline 
WA_PFLOG2_STR-REPID sy-vline 
WA_PFLOG2_STR-VARIANT sy-vline 
WA_PFLOG2_STR-TCODE sy-vline 
WA_PFLOG2_STR-USERNAME sy-vline 
WA_PFLOG2_STR-TEST sy-vline 
WA_PFLOG2_STR-BTCFLG sy-vline 
WA_PFLOG2_STR-SWPFLG sy-vline 
WA_PFLOG2_STR-SELFLG sy-vline 
WA_PFLOG2_STR-PARFLG sy-vline 
WA_PFLOG2_STR-EXPANDER sy-vline 
WA_PFLOG2_STR-JOBNAME sy-vline 
WA_PFLOG2_STR-STARTDATE sy-vline 
WA_PFLOG2_STR-STARTTIME sy-vline 
WA_PFLOG2_STR-STATUS_ICON sy-vline 
WA_PFLOG2_STR-LOCK_ICON sy-vline 
WA_PFLOG2_STR-TEST_ICON sy-vline 
WA_PFLOG2_STR-SWP_ICON sy-vline 
WA_PFLOG2_STR-SEL_ICON sy-vline 
WA_PFLOG2_STR-NODEKEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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