ABAP Select data from SAP table RJHAPAX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJHAPAX
*  INTO TABLE @DATA(IT_RJHAPAX2).
*--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_RJHAPAX INDEX 1 INTO DATA(WA_RJHAPAX2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJHAPAX-INHK_KLEV1, sy-vline,
  WA_RJHAPAX-INHK_TECH1, sy-vline,
  WA_RJHAPAX-INHK_TLEV1, sy-vline,
  WA_RJHAPAX-INHK_TECH2, sy-vline,
  WA_RJHAPAX-TERM_TYP, sy-vline,
  WA_RJHAPAX-ANFANG_PER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJHAPAX 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_RJHAPAX 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_RJHAPAX INTO WA_RJHAPAX.


*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_RJHAPAX-AVM_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHAPAX-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_RJHAPAX_STR, 
MANDT TYPE STRING,
AVM_NR TYPE STRING,
POS_NR TYPE STRING,
UPDATEFLAG TYPE STRING,
INHK_KFM TYPE STRING,
INHK_KLEV1 TYPE STRING,
INHK_TECH1 TYPE STRING,
INHK_TLEV1 TYPE STRING,
INHK_TECH2 TYPE STRING,
TERM_TYP TYPE STRING,
ANFANG_PER TYPE STRING,
ENDE_PER TYPE STRING,
BIS_PLUS TYPE STRING,
ANZ_SCHALT TYPE STRING,
TERM_ZYKL TYPE STRING,
X_MONTAG TYPE STRING,
X_DIENSTAG TYPE STRING,
X_MITTWOCH TYPE STRING,
X_DONNERST TYPE STRING,
X_FREITAG TYPE STRING,
X_SAMSTAG TYPE STRING,
X_SONNTAG TYPE STRING,
TERMINART TYPE STRING,
WUNSCH_T TYPE STRING,
KONKAUS TYPE STRING,
PLAZIERUNG TYPE STRING,
AZART_PLAZ TYPE STRING,
XFESTPLATZ TYPE STRING,
TBEL TYPE STRING,
XGESTREUT TYPE STRING,
SORTWORT TYPE STRING,
CHIFFRE_NR TYPE STRING,
CHIFFRE_KZ TYPE STRING,
CHIFFRE_OR TYPE STRING,
XUVTECH TYPE STRING,
XNOCHG_TEC TYPE STRING,
XSPERR_TEC 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,END OF T_EKKO_STR.
DATA: WA_RJHAPAX_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_RJHAPAX_STR-MANDT sy-vline 
WA_RJHAPAX_STR-AVM_NR sy-vline 
WA_RJHAPAX_STR-POS_NR sy-vline 
WA_RJHAPAX_STR-UPDATEFLAG sy-vline 
WA_RJHAPAX_STR-INHK_KFM sy-vline 
WA_RJHAPAX_STR-INHK_KLEV1 sy-vline 
WA_RJHAPAX_STR-INHK_TECH1 sy-vline 
WA_RJHAPAX_STR-INHK_TLEV1 sy-vline 
WA_RJHAPAX_STR-INHK_TECH2 sy-vline 
WA_RJHAPAX_STR-TERM_TYP sy-vline 
WA_RJHAPAX_STR-ANFANG_PER sy-vline 
WA_RJHAPAX_STR-ENDE_PER sy-vline 
WA_RJHAPAX_STR-BIS_PLUS sy-vline 
WA_RJHAPAX_STR-ANZ_SCHALT sy-vline 
WA_RJHAPAX_STR-TERM_ZYKL sy-vline 
WA_RJHAPAX_STR-X_MONTAG sy-vline 
WA_RJHAPAX_STR-X_DIENSTAG sy-vline 
WA_RJHAPAX_STR-X_MITTWOCH sy-vline 
WA_RJHAPAX_STR-X_DONNERST sy-vline 
WA_RJHAPAX_STR-X_FREITAG sy-vline 
WA_RJHAPAX_STR-X_SAMSTAG sy-vline 
WA_RJHAPAX_STR-X_SONNTAG sy-vline 
WA_RJHAPAX_STR-TERMINART sy-vline 
WA_RJHAPAX_STR-WUNSCH_T sy-vline 
WA_RJHAPAX_STR-KONKAUS sy-vline 
WA_RJHAPAX_STR-PLAZIERUNG sy-vline 
WA_RJHAPAX_STR-AZART_PLAZ sy-vline 
WA_RJHAPAX_STR-XFESTPLATZ sy-vline 
WA_RJHAPAX_STR-TBEL sy-vline 
WA_RJHAPAX_STR-XGESTREUT sy-vline 
WA_RJHAPAX_STR-SORTWORT sy-vline 
WA_RJHAPAX_STR-CHIFFRE_NR sy-vline 
WA_RJHAPAX_STR-CHIFFRE_KZ sy-vline 
WA_RJHAPAX_STR-CHIFFRE_OR sy-vline 
WA_RJHAPAX_STR-XUVTECH sy-vline 
WA_RJHAPAX_STR-XNOCHG_TEC sy-vline 
WA_RJHAPAX_STR-XSPERR_TEC sy-vline 
WA_RJHAPAX_STR-MERKMAL0 sy-vline 
WA_RJHAPAX_STR-MERKMAL1 sy-vline 
WA_RJHAPAX_STR-MERKMAL2 sy-vline 
WA_RJHAPAX_STR-MERKMAL3 sy-vline 
WA_RJHAPAX_STR-MERKMAL4 sy-vline 
WA_RJHAPAX_STR-MERKMAL5 sy-vline 
WA_RJHAPAX_STR-MERKMAL6 sy-vline 
WA_RJHAPAX_STR-MERKMAL7 sy-vline 
WA_RJHAPAX_STR-MERKMAL8 sy-vline 
WA_RJHAPAX_STR-MERKMAL9 sy-vline      INTO ld_text SEPARATED BY SPACE.

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