ABAP Select data from SAP table RJHA542 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RJHA542 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 RJHA542. 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 RJHA542 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_RJHA542 TYPE STANDARD TABLE OF RJHA542,
      WA_RJHA542 TYPE RJHA542,
      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: <RJHA542> TYPE RJHA542.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RJHA542.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RJHA542
  INTO TABLE IT_RJHA542.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJHA542
*  INTO TABLE @DATA(IT_RJHA5422).
*--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_RJHA542 INDEX 1 INTO DATA(WA_RJHA5422).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RJHA542 ASSIGNING <RJHA542>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJHA542>-MANDT = 1.
<RJHA542>-AVM_NR = 1.
<RJHA542>-POS_NR = 1.
<RJHA542>-UPOS_NR = 1.
<RJHA542>-EIN_NR = 1.

ENDLOOP.

LOOP AT IT_RJHA542 INTO WA_RJHA542.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJHA542-UR_BELEINH, sy-vline,
  WA_RJHA542-BELEGEINH, sy-vline,
  WA_RJHA542-ERSCHDAT, sy-vline,
  WA_RJHA542-JVTBEPMART, sy-vline,
  WA_RJHA542-VRTMENGE_V, sy-vline,
  WA_RJHA542-VRTMENGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJHA542 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_RJHA542 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_RJHA542 INTO WA_RJHA542.


*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_RJHA542-AVM_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHA542-AVM_NR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field UR_BELEINH
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJHA542-UR_BELEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHA542-UR_BELEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELEGEINH
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJHA542-BELEGEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHA542-BELEGEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field JMNGVT_ART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJHA542-JMNGVT_ART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHA542-JMNGVT_ART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SI_NUMMER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJHA542-SI_NUMMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHA542-SI_NUMMER.
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_RJHA542_STR, 
MANDT TYPE STRING,
AVM_NR TYPE STRING,
POS_NR TYPE STRING,
UPOS_NR TYPE STRING,
EIN_NR TYPE STRING,
UR_BELEINH TYPE STRING,
BELEGEINH TYPE STRING,
ERSCHDAT TYPE STRING,
JVTBEPMART TYPE STRING,
VRTMENGE_V TYPE STRING,
VRTMENGE TYPE STRING,
BERMENGE TYPE STRING,
JVERTPOTZUS TYPE STRING,
BLGMENGE TYPE STRING,
JMNGVT_ART TYPE STRING,
XERSCH TYPE STRING,
XVERS_GEST TYPE STRING,
XVERS_EE 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,
STATUSK TYPE STRING,
XRESERV TYPE STRING,
XSTORNIERT TYPE STRING,
STORNOGRND TYPE STRING,
EIN_ART TYPE STRING,
WERBK_TYP TYPE STRING,
WERBK_KNZ TYPE STRING,
WERBK_POS TYPE STRING,
WERBK_UPOS TYPE STRING,
WERBK_EINT TYPE STRING,
NOTIZKNZ TYPE STRING,
MARK TYPE STRING,
BE_KURZ TYPE STRING,
STAT_AMPEL TYPE STRING,
SI_NUMMER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJHA542_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_RJHA542_STR-MANDT sy-vline 
WA_RJHA542_STR-AVM_NR sy-vline 
WA_RJHA542_STR-POS_NR sy-vline 
WA_RJHA542_STR-UPOS_NR sy-vline 
WA_RJHA542_STR-EIN_NR sy-vline 
WA_RJHA542_STR-UR_BELEINH sy-vline 
WA_RJHA542_STR-BELEGEINH sy-vline 
WA_RJHA542_STR-ERSCHDAT sy-vline 
WA_RJHA542_STR-JVTBEPMART sy-vline 
WA_RJHA542_STR-VRTMENGE_V sy-vline 
WA_RJHA542_STR-VRTMENGE sy-vline 
WA_RJHA542_STR-BERMENGE sy-vline 
WA_RJHA542_STR-JVERTPOTZUS sy-vline 
WA_RJHA542_STR-BLGMENGE sy-vline 
WA_RJHA542_STR-JMNGVT_ART sy-vline 
WA_RJHA542_STR-XERSCH sy-vline 
WA_RJHA542_STR-XVERS_GEST sy-vline 
WA_RJHA542_STR-XVERS_EE sy-vline 
WA_RJHA542_STR-MERKMAL0 sy-vline 
WA_RJHA542_STR-MERKMAL1 sy-vline 
WA_RJHA542_STR-MERKMAL2 sy-vline 
WA_RJHA542_STR-MERKMAL3 sy-vline 
WA_RJHA542_STR-MERKMAL4 sy-vline 
WA_RJHA542_STR-MERKMAL5 sy-vline 
WA_RJHA542_STR-MERKMAL6 sy-vline 
WA_RJHA542_STR-MERKMAL7 sy-vline 
WA_RJHA542_STR-MERKMAL8 sy-vline 
WA_RJHA542_STR-MERKMAL9 sy-vline 
WA_RJHA542_STR-STATUSK sy-vline 
WA_RJHA542_STR-XRESERV sy-vline 
WA_RJHA542_STR-XSTORNIERT sy-vline 
WA_RJHA542_STR-STORNOGRND sy-vline 
WA_RJHA542_STR-EIN_ART sy-vline 
WA_RJHA542_STR-WERBK_TYP sy-vline 
WA_RJHA542_STR-WERBK_KNZ sy-vline 
WA_RJHA542_STR-WERBK_POS sy-vline 
WA_RJHA542_STR-WERBK_UPOS sy-vline 
WA_RJHA542_STR-WERBK_EINT sy-vline 
WA_RJHA542_STR-NOTIZKNZ sy-vline 
WA_RJHA542_STR-MARK sy-vline 
WA_RJHA542_STR-BE_KURZ sy-vline 
WA_RJHA542_STR-STAT_AMPEL sy-vline 
WA_RJHA542_STR-SI_NUMMER sy-vline      INTO ld_text SEPARATED BY SPACE.

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