ABAP Select data from SAP table QRFCLOG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QRFCLOG
*  INTO TABLE @DATA(IT_QRFCLOG2).
*--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_QRFCLOG INDEX 1 INTO DATA(WA_QRFCLOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QRFCLOG>-TID = 1.
<QRFCLOG>-TCOUNT = 1.
<QRFCLOG>-FNUM = 1.
<QRFCLOG>-QTYPE = 1.
<QRFCLOG>-FTOTAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QRFCLOG-FNAME, sy-vline,
  WA_QRFCLOG-QNAME, sy-vline,
  WA_QRFCLOG-DEST, sy-vline,
  WA_QRFCLOG-QCOUNT, sy-vline,
  WA_QRFCLOG-QSTATE, sy-vline,
  WA_QRFCLOG-QACTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QRFCLOG 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_QRFCLOG 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_QRFCLOG INTO WA_QRFCLOG.


*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_QRFCLOG_STR, 
TID TYPE STRING,
TCOUNT TYPE STRING,
FNUM TYPE STRING,
QTYPE TYPE STRING,
FTOTAL TYPE STRING,
FNAME TYPE STRING,
QNAME TYPE STRING,
DEST TYPE STRING,
QCOUNT TYPE STRING,
QSTATE TYPE STRING,
QACTION TYPE STRING,
MANDT TYPE STRING,
QUSER TYPE STRING,
QDATE TYPE STRING,
QTIME TYPE STRING,
CDATE TYPE STRING,
CTIME TYPE STRING,
ORGTID TYPE STRING,
BATCHJOB TYPE STRING,
ERRMESS TYPE STRING,
EXETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QRFCLOG_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_QRFCLOG_STR-TID sy-vline 
WA_QRFCLOG_STR-TCOUNT sy-vline 
WA_QRFCLOG_STR-FNUM sy-vline 
WA_QRFCLOG_STR-QTYPE sy-vline 
WA_QRFCLOG_STR-FTOTAL sy-vline 
WA_QRFCLOG_STR-FNAME sy-vline 
WA_QRFCLOG_STR-QNAME sy-vline 
WA_QRFCLOG_STR-DEST sy-vline 
WA_QRFCLOG_STR-QCOUNT sy-vline 
WA_QRFCLOG_STR-QSTATE sy-vline 
WA_QRFCLOG_STR-QACTION sy-vline 
WA_QRFCLOG_STR-MANDT sy-vline 
WA_QRFCLOG_STR-QUSER sy-vline 
WA_QRFCLOG_STR-QDATE sy-vline 
WA_QRFCLOG_STR-QTIME sy-vline 
WA_QRFCLOG_STR-CDATE sy-vline 
WA_QRFCLOG_STR-CTIME sy-vline 
WA_QRFCLOG_STR-ORGTID sy-vline 
WA_QRFCLOG_STR-BATCHJOB sy-vline 
WA_QRFCLOG_STR-ERRMESS sy-vline 
WA_QRFCLOG_STR-EXETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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