ABAP Select data from SAP table RJKSDMSGMAINTAIN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJKSDMSGMAINTAIN
*  INTO TABLE @DATA(IT_RJKSDMSGMAINTAIN2).
*--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_RJKSDMSGMAINTAIN INDEX 1 INTO DATA(WA_RJKSDMSGMAINTAIN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJKSDMSGMAINTAIN>-QMART = 1.
<RJKSDMSGMAINTAIN>-QMARTX = 1.
<RJKSDMSGMAINTAIN>-MSGART = 1.
<RJKSDMSGMAINTAIN>-CUSTOMER = 1.
<RJKSDMSGMAINTAIN>-CUSTOMERTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJKSDMSGMAINTAIN-PLANT, sy-vline,
  WA_RJKSDMSGMAINTAIN-PLANTTEXT, sy-vline,
  WA_RJKSDMSGMAINTAIN-VISITPLAN, sy-vline,
  WA_RJKSDMSGMAINTAIN-VISITPLANTEXT, sy-vline,
  WA_RJKSDMSGMAINTAIN-ISSUE, sy-vline,
  WA_RJKSDMSGMAINTAIN-ISSUETEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJKSDMSGMAINTAIN 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_RJKSDMSGMAINTAIN 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_RJKSDMSGMAINTAIN INTO WA_RJKSDMSGMAINTAIN.


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

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

*Conversion exit MATN1, internal->external for field ISSUE
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJKSDMSGMAINTAIN-ISSUE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJKSDMSGMAINTAIN-ISSUE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field QMNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJKSDMSGMAINTAIN-QMNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJKSDMSGMAINTAIN-QMNUM.
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_RJKSDMSGMAINTAIN_STR, 
QMART TYPE STRING,
QMARTX TYPE STRING,
MSGART TYPE STRING,
CUSTOMER TYPE STRING,
CUSTOMERTEXT TYPE STRING,
PLANT TYPE STRING,
PLANTTEXT TYPE STRING,
VISITPLAN TYPE STRING,
VISITPLANTEXT TYPE STRING,
ISSUE TYPE STRING,
ISSUETEXT TYPE STRING,
VKORG TYPE STRING,
VKORGTEXT TYPE STRING,
VTWEG TYPE STRING,
VTWEGTEXT TYPE STRING,
SPART TYPE STRING,
SPARTTEXT TYPE STRING,
SHORTTXT TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
QMNUM TYPE STRING,
QMOBJNR TYPE STRING,
STATUSTEXT TYPE STRING,
CAUSECATEGORY TYPE STRING,
CAUSETEXT TYPE STRING,
CAUSE_CODEGRP TYPE STRING,
CAUSE_CODE TYPE STRING,
CAUSECODETEXT TYPE STRING,
ROUTE TYPE STRING,
ROUTETEXT TYPE STRING,
SHIPPINGDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJKSDMSGMAINTAIN_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_RJKSDMSGMAINTAIN_STR-QMART sy-vline 
WA_RJKSDMSGMAINTAIN_STR-QMARTX sy-vline 
WA_RJKSDMSGMAINTAIN_STR-MSGART sy-vline 
WA_RJKSDMSGMAINTAIN_STR-CUSTOMER sy-vline 
WA_RJKSDMSGMAINTAIN_STR-CUSTOMERTEXT sy-vline 
WA_RJKSDMSGMAINTAIN_STR-PLANT sy-vline 
WA_RJKSDMSGMAINTAIN_STR-PLANTTEXT sy-vline 
WA_RJKSDMSGMAINTAIN_STR-VISITPLAN sy-vline 
WA_RJKSDMSGMAINTAIN_STR-VISITPLANTEXT sy-vline 
WA_RJKSDMSGMAINTAIN_STR-ISSUE sy-vline 
WA_RJKSDMSGMAINTAIN_STR-ISSUETEXT sy-vline 
WA_RJKSDMSGMAINTAIN_STR-VKORG sy-vline 
WA_RJKSDMSGMAINTAIN_STR-VKORGTEXT sy-vline 
WA_RJKSDMSGMAINTAIN_STR-VTWEG sy-vline 
WA_RJKSDMSGMAINTAIN_STR-VTWEGTEXT sy-vline 
WA_RJKSDMSGMAINTAIN_STR-SPART sy-vline 
WA_RJKSDMSGMAINTAIN_STR-SPARTTEXT sy-vline 
WA_RJKSDMSGMAINTAIN_STR-SHORTTXT sy-vline 
WA_RJKSDMSGMAINTAIN_STR-DATE_FROM sy-vline 
WA_RJKSDMSGMAINTAIN_STR-DATE_TO sy-vline 
WA_RJKSDMSGMAINTAIN_STR-QMNUM sy-vline 
WA_RJKSDMSGMAINTAIN_STR-QMOBJNR sy-vline 
WA_RJKSDMSGMAINTAIN_STR-STATUSTEXT sy-vline 
WA_RJKSDMSGMAINTAIN_STR-CAUSECATEGORY sy-vline 
WA_RJKSDMSGMAINTAIN_STR-CAUSETEXT sy-vline 
WA_RJKSDMSGMAINTAIN_STR-CAUSE_CODEGRP sy-vline 
WA_RJKSDMSGMAINTAIN_STR-CAUSE_CODE sy-vline 
WA_RJKSDMSGMAINTAIN_STR-CAUSECODETEXT sy-vline 
WA_RJKSDMSGMAINTAIN_STR-ROUTE sy-vline 
WA_RJKSDMSGMAINTAIN_STR-ROUTETEXT sy-vline 
WA_RJKSDMSGMAINTAIN_STR-SHIPPINGDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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