ABAP Select data from SAP table RJHMXK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJHMXK
*  INTO TABLE @DATA(IT_RJHMXK2).
*--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_RJHMXK INDEX 1 INTO DATA(WA_RJHMXK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJHMXK>-MANDT = 1.
<RJHMXK>-VTNR = 1.
<RJHMXK>-MXART = 1.
<RJHMXK>-PAKNR = 1.
<RJHMXK>-KAUSSCHL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJHMXK-ERFREGEL, sy-vline,
  WA_RJHMXK-BESTIMMTER, sy-vline,
  WA_RJHMXK-MENGE1, sy-vline,
  WA_RJHMXK-EINH1, sy-vline,
  WA_RJHMXK-MENGE2, sy-vline,
  WA_RJHMXK-EINH2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJHMXK 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_RJHMXK 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_RJHMXK INTO WA_RJHMXK.


*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 VTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJHMXK-VTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHMXK-VTNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field EINH1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RJHMXK-EINH1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHMXK-EINH1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EINH2
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RJHMXK-EINH2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHMXK-EINH2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABINHNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJHMXK-ABINHNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHMXK-ABINHNR.
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_RJHMXK_STR, 
MANDT TYPE STRING,
VTNR TYPE STRING,
MXART TYPE STRING,
PAKNR TYPE STRING,
KAUSSCHL TYPE STRING,
ERFREGEL TYPE STRING,
BESTIMMTER TYPE STRING,
MENGE1 TYPE STRING,
EINH1 TYPE STRING,
MENGE2 TYPE STRING,
EINH2 TYPE STRING,
UMSATZ TYPE STRING,
WEINH TYPE STRING,
ABRSTATUS TYPE STRING,
AUFSTATUS TYPE STRING,
ERFUSER TYPE STRING,
ERFDATE TYPE STRING,
ERFTIME TYPE STRING,
AENUSER TYPE STRING,
AENDATE TYPE STRING,
AENTIME TYPE STRING,
XLOEVM TYPE STRING,
VKORG TYPE STRING,
ABSTYP TYPE STRING,
ABSART TYPE STRING,
RABANP TYPE STRING,
LFZBEG TYPE STRING,
LFZEND TYPE STRING,
ABRGNR TYPE STRING,
ABINHNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJHMXK_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_RJHMXK_STR-MANDT sy-vline 
WA_RJHMXK_STR-VTNR sy-vline 
WA_RJHMXK_STR-MXART sy-vline 
WA_RJHMXK_STR-PAKNR sy-vline 
WA_RJHMXK_STR-KAUSSCHL sy-vline 
WA_RJHMXK_STR-ERFREGEL sy-vline 
WA_RJHMXK_STR-BESTIMMTER sy-vline 
WA_RJHMXK_STR-MENGE1 sy-vline 
WA_RJHMXK_STR-EINH1 sy-vline 
WA_RJHMXK_STR-MENGE2 sy-vline 
WA_RJHMXK_STR-EINH2 sy-vline 
WA_RJHMXK_STR-UMSATZ sy-vline 
WA_RJHMXK_STR-WEINH sy-vline 
WA_RJHMXK_STR-ABRSTATUS sy-vline 
WA_RJHMXK_STR-AUFSTATUS sy-vline 
WA_RJHMXK_STR-ERFUSER sy-vline 
WA_RJHMXK_STR-ERFDATE sy-vline 
WA_RJHMXK_STR-ERFTIME sy-vline 
WA_RJHMXK_STR-AENUSER sy-vline 
WA_RJHMXK_STR-AENDATE sy-vline 
WA_RJHMXK_STR-AENTIME sy-vline 
WA_RJHMXK_STR-XLOEVM sy-vline 
WA_RJHMXK_STR-VKORG sy-vline 
WA_RJHMXK_STR-ABSTYP sy-vline 
WA_RJHMXK_STR-ABSART sy-vline 
WA_RJHMXK_STR-RABANP sy-vline 
WA_RJHMXK_STR-LFZBEG sy-vline 
WA_RJHMXK_STR-LFZEND sy-vline 
WA_RJHMXK_STR-ABRGNR sy-vline 
WA_RJHMXK_STR-ABINHNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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