ABAP Select data from SAP table RJMHV1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RJMHV1 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 RJMHV1. 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 RJMHV1 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_RJMHV1 TYPE STANDARD TABLE OF RJMHV1,
      WA_RJMHV1 TYPE RJMHV1,
      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: <RJMHV1> TYPE RJMHV1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RJMHV1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RJMHV1
  INTO TABLE IT_RJMHV1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJMHV1
*  INTO TABLE @DATA(IT_RJMHV12).
*--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_RJMHV1 INDEX 1 INTO DATA(WA_RJMHV12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RJMHV1 ASSIGNING <RJMHV1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJMHV1>-VOR_BEDNR = 1.
<RJMHV1>-AVMPOSTXT1 = 1.
<RJMHV1>-AVMPOSTXT2 = 1.
<RJMHV1>-AVMPOSTXT3 = 1.
<RJMHV1>-AVMPOSTXT4 = 1.

ENDLOOP.

LOOP AT IT_RJMHV1 INTO WA_RJMHV1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJMHV1-AVMPOSTXT5, sy-vline,
  WA_RJMHV1-AVMPOSTXT6, sy-vline,
  WA_RJMHV1-AFARB_TEXT, sy-vline,
  WA_RJMHV1-AFORM_TEXT, sy-vline,
  WA_RJMHV1-AGEST_TEXT, sy-vline,
  WA_RJMHV1-AAREA_TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJMHV1 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_RJMHV1 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_RJMHV1 INTO WA_RJMHV1.


*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 VOR_BEDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJMHV1-VOR_BEDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJMHV1-VOR_BEDNR.
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_RJMHV1_STR, 
VOR_BEDNR TYPE STRING,
AVMPOSTXT1 TYPE STRING,
AVMPOSTXT2 TYPE STRING,
AVMPOSTXT3 TYPE STRING,
AVMPOSTXT4 TYPE STRING,
AVMPOSTXT5 TYPE STRING,
AVMPOSTXT6 TYPE STRING,
AFARB_TEXT TYPE STRING,
AFORM_TEXT TYPE STRING,
AGEST_TEXT TYPE STRING,
AAREA_TEXT TYPE STRING,
ARECH_TEXT TYPE STRING,
DTYP_TEXT TYPE STRING,
WFORM_TEXT TYPE STRING,
PSTYV_TEXT TYPE STRING,
SIBEARB_TEXT TYPE STRING,
SITYP_TEXT TYPE STRING,
JVTBEPMART_TEXT TYPE STRING,
SITYPV_TEXT TYPE STRING,
BOOK_OL_TEXT TYPE STRING,
FORMAT_ONL_TEXT TYPE STRING,
BELEINH1_TEXT TYPE STRING,
INHK_KFM_TEXT TYPE STRING,
INHK_SOVER_TEXT TYPE STRING,
PRODH_TEXT TYPE STRING,
KONDA_TEXT TYPE STRING,
KAMPAGNE_TEXT TYPE STRING,
BED_POSLCN TYPE STRING,
BED_LCNT TYPE STRING,
BED_PGNR TYPE STRING,
BES_POSLCN TYPE STRING,
BES_LCNT TYPE STRING,
BES_PGNR TYPE STRING,
PK_RELEVANCE_TEXT TYPE STRING,
PACKAGE_TYPE_TEXT TYPE STRING,
PACKAGE_CATEGORY_TEXT TYPE STRING,
PACKAGE_ID_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJMHV1_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_RJMHV1_STR-VOR_BEDNR sy-vline 
WA_RJMHV1_STR-AVMPOSTXT1 sy-vline 
WA_RJMHV1_STR-AVMPOSTXT2 sy-vline 
WA_RJMHV1_STR-AVMPOSTXT3 sy-vline 
WA_RJMHV1_STR-AVMPOSTXT4 sy-vline 
WA_RJMHV1_STR-AVMPOSTXT5 sy-vline 
WA_RJMHV1_STR-AVMPOSTXT6 sy-vline 
WA_RJMHV1_STR-AFARB_TEXT sy-vline 
WA_RJMHV1_STR-AFORM_TEXT sy-vline 
WA_RJMHV1_STR-AGEST_TEXT sy-vline 
WA_RJMHV1_STR-AAREA_TEXT sy-vline 
WA_RJMHV1_STR-ARECH_TEXT sy-vline 
WA_RJMHV1_STR-DTYP_TEXT sy-vline 
WA_RJMHV1_STR-WFORM_TEXT sy-vline 
WA_RJMHV1_STR-PSTYV_TEXT sy-vline 
WA_RJMHV1_STR-SIBEARB_TEXT sy-vline 
WA_RJMHV1_STR-SITYP_TEXT sy-vline 
WA_RJMHV1_STR-JVTBEPMART_TEXT sy-vline 
WA_RJMHV1_STR-SITYPV_TEXT sy-vline 
WA_RJMHV1_STR-BOOK_OL_TEXT sy-vline 
WA_RJMHV1_STR-FORMAT_ONL_TEXT sy-vline 
WA_RJMHV1_STR-BELEINH1_TEXT sy-vline 
WA_RJMHV1_STR-INHK_KFM_TEXT sy-vline 
WA_RJMHV1_STR-INHK_SOVER_TEXT sy-vline 
WA_RJMHV1_STR-PRODH_TEXT sy-vline 
WA_RJMHV1_STR-KONDA_TEXT sy-vline 
WA_RJMHV1_STR-KAMPAGNE_TEXT sy-vline 
WA_RJMHV1_STR-BED_POSLCN sy-vline 
WA_RJMHV1_STR-BED_LCNT sy-vline 
WA_RJMHV1_STR-BED_PGNR sy-vline 
WA_RJMHV1_STR-BES_POSLCN sy-vline 
WA_RJMHV1_STR-BES_LCNT sy-vline 
WA_RJMHV1_STR-BES_PGNR sy-vline 
WA_RJMHV1_STR-PK_RELEVANCE_TEXT sy-vline 
WA_RJMHV1_STR-PACKAGE_TYPE_TEXT sy-vline 
WA_RJMHV1_STR-PACKAGE_CATEGORY_TEXT sy-vline 
WA_RJMHV1_STR-PACKAGE_ID_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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