ABAP Select data from SAP table DEF_PAR_FU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DEF_PAR_FU
*  INTO TABLE @DATA(IT_DEF_PAR_FU2).
*--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_DEF_PAR_FU INDEX 1 INTO DATA(WA_DEF_PAR_FU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DEF_PAR_FU>-LOC_REMOTE = 1.
<DEF_PAR_FU>-NO_YES = 1.
<DEF_PAR_FU>-RFC_DATA_H = 1.
<DEF_PAR_FU>-RFC_DATA = 1.
<DEF_PAR_FU>-TAB_TYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DEF_PAR_FU-LOCAL_DATA, sy-vline,
  WA_DEF_PAR_FU-LOC_DATA_H, sy-vline,
  WA_DEF_PAR_FU-RECCOUNT, sy-vline,
  WA_DEF_PAR_FU-MAXRECORDS, sy-vline,
  WA_DEF_PAR_FU-RECORDSIZE, sy-vline,
  WA_DEF_PAR_FU-ACTIVEFLAG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DEF_PAR_FU 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_DEF_PAR_FU 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_DEF_PAR_FU INTO WA_DEF_PAR_FU.


*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_DEF_PAR_FU_STR, 
LOC_REMOTE TYPE STRING,
NO_YES TYPE STRING,
RFC_DATA_H TYPE STRING,
RFC_DATA TYPE STRING,
TAB_TYP TYPE STRING,
LOCAL_DATA TYPE STRING,
LOC_DATA_H TYPE STRING,
RECCOUNT TYPE STRING,
MAXRECORDS TYPE STRING,
RECORDSIZE TYPE STRING,
ACTIVEFLAG TYPE STRING,
INTERVAL TYPE STRING,
COLLVERS TYPE STRING,
COLLSINCE TYPE STRING,
OPSYSTEM TYPE STRING,
DETAILSCOL TYPE STRING,
DETAILSREQ TYPE STRING,
DETAILSMOD TYPE STRING,
LASTCOLLWR TYPE STRING,
LASTCOLLIN TYPE STRING,
NORMCOLLIN TYPE STRING,
TRACELEVEL TYPE STRING,
IDLEINTERV TYPE STRING,
IDLEAFTER TYPE STRING,
REQ_TYP TYPE STRING,
REQ_ID TYPE STRING,
REQ_RC TYPE STRING,
REQ_MODE TYPE STRING,
REQ_PARAM1 TYPE STRING,
REQ_PARAM2 TYPE STRING,
REQ_PARAM3 TYPE STRING,
PATHNAME TYPE STRING,
FREESPACE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DEF_PAR_FU_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_DEF_PAR_FU_STR-LOC_REMOTE sy-vline 
WA_DEF_PAR_FU_STR-NO_YES sy-vline 
WA_DEF_PAR_FU_STR-RFC_DATA_H sy-vline 
WA_DEF_PAR_FU_STR-RFC_DATA sy-vline 
WA_DEF_PAR_FU_STR-TAB_TYP sy-vline 
WA_DEF_PAR_FU_STR-LOCAL_DATA sy-vline 
WA_DEF_PAR_FU_STR-LOC_DATA_H sy-vline 
WA_DEF_PAR_FU_STR-RECCOUNT sy-vline 
WA_DEF_PAR_FU_STR-MAXRECORDS sy-vline 
WA_DEF_PAR_FU_STR-RECORDSIZE sy-vline 
WA_DEF_PAR_FU_STR-ACTIVEFLAG sy-vline 
WA_DEF_PAR_FU_STR-INTERVAL sy-vline 
WA_DEF_PAR_FU_STR-COLLVERS sy-vline 
WA_DEF_PAR_FU_STR-COLLSINCE sy-vline 
WA_DEF_PAR_FU_STR-OPSYSTEM sy-vline 
WA_DEF_PAR_FU_STR-DETAILSCOL sy-vline 
WA_DEF_PAR_FU_STR-DETAILSREQ sy-vline 
WA_DEF_PAR_FU_STR-DETAILSMOD sy-vline 
WA_DEF_PAR_FU_STR-LASTCOLLWR sy-vline 
WA_DEF_PAR_FU_STR-LASTCOLLIN sy-vline 
WA_DEF_PAR_FU_STR-NORMCOLLIN sy-vline 
WA_DEF_PAR_FU_STR-TRACELEVEL sy-vline 
WA_DEF_PAR_FU_STR-IDLEINTERV sy-vline 
WA_DEF_PAR_FU_STR-IDLEAFTER sy-vline 
WA_DEF_PAR_FU_STR-REQ_TYP sy-vline 
WA_DEF_PAR_FU_STR-REQ_ID sy-vline 
WA_DEF_PAR_FU_STR-REQ_RC sy-vline 
WA_DEF_PAR_FU_STR-REQ_MODE sy-vline 
WA_DEF_PAR_FU_STR-REQ_PARAM1 sy-vline 
WA_DEF_PAR_FU_STR-REQ_PARAM2 sy-vline 
WA_DEF_PAR_FU_STR-REQ_PARAM3 sy-vline 
WA_DEF_PAR_FU_STR-PATHNAME sy-vline 
WA_DEF_PAR_FU_STR-FREESPACE sy-vline      INTO ld_text SEPARATED BY SPACE.

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