ABAP Select data from SAP table RJJA220 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP RJJA220 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 RJJA220. 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 RJJA220 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_RJJA220 TYPE STANDARD TABLE OF RJJA220,
      WA_RJJA220 TYPE RJJA220,
      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: <RJJA220> TYPE RJJA220.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RJJA220.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RJJA220
  INTO TABLE IT_RJJA220.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJJA220
*  INTO TABLE @DATA(IT_RJJA2202).
*--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_RJJA220 INDEX 1 INTO DATA(WA_RJJA2202).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RJJA220 ASSIGNING <RJJA220>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJJA220>-PARH1 = 1.
<RJJA220>-PARH2 = 1.
<RJJA220>-PARH3 = 1.
<RJJA220>-PARH4 = 1.
<RJJA220>-PARH5 = 1.

ENDLOOP.

LOOP AT IT_RJJA220 INTO WA_RJJA220.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJJA220-PAKN1, sy-vline,
  WA_RJJA220-PAKN2, sy-vline,
  WA_RJJA220-PAKN3, sy-vline,
  WA_RJJA220-PAKN4, sy-vline,
  WA_RJJA220-PAKN5, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_RJJA220 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_RJJA220 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_RJJA220 INTO WA_RJJA220.


*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_RJJA220_STR, 
PARH1 TYPE STRING,
PARH2 TYPE STRING,
PARH3 TYPE STRING,
PARH4 TYPE STRING,
PARH5 TYPE STRING,
PAKN1 TYPE STRING,
PAKN2 TYPE STRING,
PAKN3 TYPE STRING,
PAKN4 TYPE STRING,
PAKN5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJJA220_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_RJJA220_STR-PARH1 sy-vline 
WA_RJJA220_STR-PARH2 sy-vline 
WA_RJJA220_STR-PARH3 sy-vline 
WA_RJJA220_STR-PARH4 sy-vline 
WA_RJJA220_STR-PARH5 sy-vline 
WA_RJJA220_STR-PAKN1 sy-vline 
WA_RJJA220_STR-PAKN2 sy-vline 
WA_RJJA220_STR-PAKN3 sy-vline 
WA_RJJA220_STR-PAKN4 sy-vline 
WA_RJJA220_STR-PAKN5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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