ABAP Select data from SAP table J_3RFF4PARA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3RFF4PARA 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 J_3RFF4PARA. 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 J_3RFF4PARA 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_J_3RFF4PARA TYPE STANDARD TABLE OF J_3RFF4PARA,
      WA_J_3RFF4PARA TYPE J_3RFF4PARA,
      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: <J_3RFF4PARA> TYPE J_3RFF4PARA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3RFF4PARA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3RFF4PARA
  INTO TABLE IT_J_3RFF4PARA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3RFF4PARA
*  INTO TABLE @DATA(IT_J_3RFF4PARA2).
*--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_J_3RFF4PARA INDEX 1 INTO DATA(WA_J_3RFF4PARA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3RFF4PARA ASSIGNING <J_3RFF4PARA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3RFF4PARA>-MANDT = 1.
<J_3RFF4PARA>-VERSN = 1.
<J_3RFF4PARA>-STROW = 1.
<J_3RFF4PARA>-ACTVTYPE = 1.
<J_3RFF4PARA>-LINENUM = 1.

ENDLOOP.

LOOP AT IT_J_3RFF4PARA INTO WA_J_3RFF4PARA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3RFF4PARA-ACCTYPE, sy-vline,
  WA_J_3RFF4PARA-FIELDNAME, sy-vline,
  WA_J_3RFF4PARA-SOPTION, sy-vline,
  WA_J_3RFF4PARA-LOW, sy-vline,
  WA_J_3RFF4PARA-HIGH, sy-vline,
  WA_J_3RFF4PARA-INDEX_LOW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3RFF4PARA 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_J_3RFF4PARA 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_J_3RFF4PARA INTO WA_J_3RFF4PARA.


*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_J_3RFF4PARA_STR, 
MANDT TYPE STRING,
VERSN TYPE STRING,
STROW TYPE STRING,
ACTVTYPE TYPE STRING,
LINENUM TYPE STRING,
ACCTYPE TYPE STRING,
FIELDNAME TYPE STRING,
SOPTION TYPE STRING,
LOW TYPE STRING,
HIGH TYPE STRING,
INDEX_LOW TYPE STRING,
INDEX_HIGH TYPE STRING,
AND_OR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3RFF4PARA_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_J_3RFF4PARA_STR-MANDT sy-vline 
WA_J_3RFF4PARA_STR-VERSN sy-vline 
WA_J_3RFF4PARA_STR-STROW sy-vline 
WA_J_3RFF4PARA_STR-ACTVTYPE sy-vline 
WA_J_3RFF4PARA_STR-LINENUM sy-vline 
WA_J_3RFF4PARA_STR-ACCTYPE sy-vline 
WA_J_3RFF4PARA_STR-FIELDNAME sy-vline 
WA_J_3RFF4PARA_STR-SOPTION sy-vline 
WA_J_3RFF4PARA_STR-LOW sy-vline 
WA_J_3RFF4PARA_STR-HIGH sy-vline 
WA_J_3RFF4PARA_STR-INDEX_LOW sy-vline 
WA_J_3RFF4PARA_STR-INDEX_HIGH sy-vline 
WA_J_3RFF4PARA_STR-AND_OR sy-vline      INTO ld_text SEPARATED BY SPACE.

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