ABAP Select data from SAP table RJHAPOX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJHAPOX
*  INTO TABLE @DATA(IT_RJHAPOX2).
*--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_RJHAPOX INDEX 1 INTO DATA(WA_RJHAPOX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJHAPOX>-MANDT = 1.
<RJHAPOX>-AVM_NR = 1.
<RJHAPOX>-POS_NR = 1.
<RJHAPOX>-UPDATEFLAG = 1.
<RJHAPOX>-BOOK_OL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJHAPOX-INHK_KFM, sy-vline,
  WA_RJHAPOX-INHK_KLEV1, sy-vline,
  WA_RJHAPOX-ONLPOS_START, sy-vline,
  WA_RJHAPOX-ONLPOS_ENDE, sy-vline,
  WA_RJHAPOX-MERKMAL0, sy-vline,
  WA_RJHAPOX-MERKMAL1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJHAPOX 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_RJHAPOX 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_RJHAPOX INTO WA_RJHAPOX.


*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 AVM_NR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJHAPOX-AVM_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHAPOX-AVM_NR.
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_RJHAPOX_STR, 
MANDT TYPE STRING,
AVM_NR TYPE STRING,
POS_NR TYPE STRING,
UPDATEFLAG TYPE STRING,
BOOK_OL TYPE STRING,
INHK_KFM TYPE STRING,
INHK_KLEV1 TYPE STRING,
ONLPOS_START TYPE STRING,
ONLPOS_ENDE TYPE STRING,
MERKMAL0 TYPE STRING,
MERKMAL1 TYPE STRING,
MERKMAL2 TYPE STRING,
MERKMAL3 TYPE STRING,
MERKMAL4 TYPE STRING,
MERKMAL5 TYPE STRING,
MERKMAL6 TYPE STRING,
MERKMAL7 TYPE STRING,
MERKMAL8 TYPE STRING,
MERKMAL9 TYPE STRING,
TIMESLICE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJHAPOX_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_RJHAPOX_STR-MANDT sy-vline 
WA_RJHAPOX_STR-AVM_NR sy-vline 
WA_RJHAPOX_STR-POS_NR sy-vline 
WA_RJHAPOX_STR-UPDATEFLAG sy-vline 
WA_RJHAPOX_STR-BOOK_OL sy-vline 
WA_RJHAPOX_STR-INHK_KFM sy-vline 
WA_RJHAPOX_STR-INHK_KLEV1 sy-vline 
WA_RJHAPOX_STR-ONLPOS_START sy-vline 
WA_RJHAPOX_STR-ONLPOS_ENDE sy-vline 
WA_RJHAPOX_STR-MERKMAL0 sy-vline 
WA_RJHAPOX_STR-MERKMAL1 sy-vline 
WA_RJHAPOX_STR-MERKMAL2 sy-vline 
WA_RJHAPOX_STR-MERKMAL3 sy-vline 
WA_RJHAPOX_STR-MERKMAL4 sy-vline 
WA_RJHAPOX_STR-MERKMAL5 sy-vline 
WA_RJHAPOX_STR-MERKMAL6 sy-vline 
WA_RJHAPOX_STR-MERKMAL7 sy-vline 
WA_RJHAPOX_STR-MERKMAL8 sy-vline 
WA_RJHAPOX_STR-MERKMAL9 sy-vline 
WA_RJHAPOX_STR-TIMESLICE sy-vline      INTO ld_text SEPARATED BY SPACE.

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