ABAP Select data from SAP table DISMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DISMP
*  INTO TABLE @DATA(IT_DISMP2).
*--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_DISMP INDEX 1 INTO DATA(WA_DISMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DISMP>-CLIENT = 1.
<DISMP>-ISMNR = 1.
<DISMP>-ISMVR = 1.
<DISMP>-COPER = 1.
<DISMP>-ISMTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DISMP-APPLAR, sy-vline,
  WA_DISMP-ISMART, sy-vline,
  WA_DISMP-VALDTFRM, sy-vline,
  WA_DISMP-VALDTTO, sy-vline,
  WA_DISMP-ISMCAT, sy-vline,
  WA_DISMP-ISMGRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DISMP 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_DISMP 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_DISMP INTO WA_DISMP.


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

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

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

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

*Conversion exit ALPHA, internal->external for field QMNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DISMP-QMNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DISMP-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_DISMP_STR, 
CLIENT TYPE STRING,
ISMNR TYPE STRING,
ISMVR TYPE STRING,
COPER TYPE STRING,
ISMTP TYPE STRING,
APPLAR TYPE STRING,
ISMART TYPE STRING,
VALDTFRM TYPE STRING,
VALDTTO TYPE STRING,
ISMCAT TYPE STRING,
ISMGRP TYPE STRING,
ISMCOD TYPE STRING,
ARTPR TYPE STRING,
PRIOK TYPE STRING,
ISMST TYPE STRING,
RBNR TYPE STRING,
OPCAT TYPE STRING,
PRCAT TYPE STRING,
CACAT TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
FLGDEL TYPE STRING,
OBJNR TYPE STRING,
SISMNR TYPE STRING,
SISMVR TYPE STRING,
RISMNR TYPE STRING,
RISMVR TYPE STRING,
LISMNR TYPE STRING,
LISMVR TYPE STRING,
QMNUM TYPE STRING,
ISMPTX TYPE STRING,
ACTYP TYPE STRING,
ISMLICON TYPE STRING,
ISMSICON TYPE STRING,
RBNRX TYPE STRING,
STTXT TYPE STRING,
USTAX TYPE STRING,
USTTXT TYPE STRING,
TXTSYGR TYPE STRING,
TXTSYCD TYPE STRING,
TXTSTAT TYPE STRING,
TXTSMART TYPE STRING,
TXTPRI TYPE STRING,
TXTAPPLAR TYPE STRING,
FLGUPD TYPE STRING,
FLGPOST TYPE STRING,
ISMTXT TYPE STRING,
ITOPCNT TYPE STRING,
ITPRCNT TYPE STRING,
ITCACNT TYPE STRING,
ICONEXP TYPE STRING,
FLGCAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DISMP_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_DISMP_STR-CLIENT sy-vline 
WA_DISMP_STR-ISMNR sy-vline 
WA_DISMP_STR-ISMVR sy-vline 
WA_DISMP_STR-COPER sy-vline 
WA_DISMP_STR-ISMTP sy-vline 
WA_DISMP_STR-APPLAR sy-vline 
WA_DISMP_STR-ISMART sy-vline 
WA_DISMP_STR-VALDTFRM sy-vline 
WA_DISMP_STR-VALDTTO sy-vline 
WA_DISMP_STR-ISMCAT sy-vline 
WA_DISMP_STR-ISMGRP sy-vline 
WA_DISMP_STR-ISMCOD sy-vline 
WA_DISMP_STR-ARTPR sy-vline 
WA_DISMP_STR-PRIOK sy-vline 
WA_DISMP_STR-ISMST sy-vline 
WA_DISMP_STR-RBNR sy-vline 
WA_DISMP_STR-OPCAT sy-vline 
WA_DISMP_STR-PRCAT sy-vline 
WA_DISMP_STR-CACAT sy-vline 
WA_DISMP_STR-ERNAM sy-vline 
WA_DISMP_STR-ERDAT sy-vline 
WA_DISMP_STR-ERTIM sy-vline 
WA_DISMP_STR-AENAM sy-vline 
WA_DISMP_STR-AEDAT sy-vline 
WA_DISMP_STR-AETIM sy-vline 
WA_DISMP_STR-FLGDEL sy-vline 
WA_DISMP_STR-OBJNR sy-vline 
WA_DISMP_STR-SISMNR sy-vline 
WA_DISMP_STR-SISMVR sy-vline 
WA_DISMP_STR-RISMNR sy-vline 
WA_DISMP_STR-RISMVR sy-vline 
WA_DISMP_STR-LISMNR sy-vline 
WA_DISMP_STR-LISMVR sy-vline 
WA_DISMP_STR-QMNUM sy-vline 
WA_DISMP_STR-ISMPTX sy-vline 
WA_DISMP_STR-ACTYP sy-vline 
WA_DISMP_STR-ISMLICON sy-vline 
WA_DISMP_STR-ISMSICON sy-vline 
WA_DISMP_STR-RBNRX sy-vline 
WA_DISMP_STR-STTXT sy-vline 
WA_DISMP_STR-USTAX sy-vline 
WA_DISMP_STR-USTTXT sy-vline 
WA_DISMP_STR-TXTSYGR sy-vline 
WA_DISMP_STR-TXTSYCD sy-vline 
WA_DISMP_STR-TXTSTAT sy-vline 
WA_DISMP_STR-TXTSMART sy-vline 
WA_DISMP_STR-TXTPRI sy-vline 
WA_DISMP_STR-TXTAPPLAR sy-vline 
WA_DISMP_STR-FLGUPD sy-vline 
WA_DISMP_STR-FLGPOST sy-vline 
WA_DISMP_STR-ISMTXT sy-vline 
WA_DISMP_STR-ITOPCNT sy-vline 
WA_DISMP_STR-ITPRCNT sy-vline 
WA_DISMP_STR-ITCACNT sy-vline 
WA_DISMP_STR-ICONEXP sy-vline 
WA_DISMP_STR-FLGCAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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