ABAP Select data from SAP table DISMPOCX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DISMPOCX
*  INTO TABLE @DATA(IT_DISMPOCX2).
*--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_DISMPOCX INDEX 1 INTO DATA(WA_DISMPOCX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DISMPOCX>-CLIENT = 1.
<DISMPOCX>-ISMTXT = 1.
<DISMPOCX>-ISMNR = 1.
<DISMPOCX>-EXPTEXT = 1.
<DISMPOCX>-SCORE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DISMPOCX-ISMTP, sy-vline,
  WA_DISMPOCX-ISMPTX, sy-vline,
  WA_DISMPOCX-APPLAR, sy-vline,
  WA_DISMPOCX-TXTAPPLAR, sy-vline,
  WA_DISMPOCX-ISMART, sy-vline,
  WA_DISMPOCX-TXTSMART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DISMPOCX 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_DISMPOCX 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_DISMPOCX INTO WA_DISMPOCX.


*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_DISMPOCX-ISMNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DISMPOCX-ISMNR.
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_DISMPOCX_STR, 
CLIENT TYPE STRING,
ISMTXT TYPE STRING,
ISMNR TYPE STRING,
EXPTEXT TYPE STRING,
SCORE TYPE STRING,
ISMTP TYPE STRING,
ISMPTX TYPE STRING,
APPLAR TYPE STRING,
TXTAPPLAR TYPE STRING,
ISMART TYPE STRING,
TXTSMART TYPE STRING,
RBNR TYPE STRING,
RBNRX TYPE STRING,
STTXT TYPE STRING,
USTTXT TYPE STRING,
ISMCAT TYPE STRING,
ISMGRP TYPE STRING,
ISMCOD TYPE STRING,
TXTSYCD TYPE STRING,
TXTPRI TYPE STRING,
VALDATFRM TYPE STRING,
VALDATTO TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DISMPOCX_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_DISMPOCX_STR-CLIENT sy-vline 
WA_DISMPOCX_STR-ISMTXT sy-vline 
WA_DISMPOCX_STR-ISMNR sy-vline 
WA_DISMPOCX_STR-EXPTEXT sy-vline 
WA_DISMPOCX_STR-SCORE sy-vline 
WA_DISMPOCX_STR-ISMTP sy-vline 
WA_DISMPOCX_STR-ISMPTX sy-vline 
WA_DISMPOCX_STR-APPLAR sy-vline 
WA_DISMPOCX_STR-TXTAPPLAR sy-vline 
WA_DISMPOCX_STR-ISMART sy-vline 
WA_DISMPOCX_STR-TXTSMART sy-vline 
WA_DISMPOCX_STR-RBNR sy-vline 
WA_DISMPOCX_STR-RBNRX sy-vline 
WA_DISMPOCX_STR-STTXT sy-vline 
WA_DISMPOCX_STR-USTTXT sy-vline 
WA_DISMPOCX_STR-ISMCAT sy-vline 
WA_DISMPOCX_STR-ISMGRP sy-vline 
WA_DISMPOCX_STR-ISMCOD sy-vline 
WA_DISMPOCX_STR-TXTSYCD sy-vline 
WA_DISMPOCX_STR-TXTPRI sy-vline 
WA_DISMPOCX_STR-VALDATFRM sy-vline 
WA_DISMPOCX_STR-VALDATTO sy-vline 
WA_DISMPOCX_STR-ERNAM sy-vline 
WA_DISMPOCX_STR-ERDAT sy-vline 
WA_DISMPOCX_STR-AENAM sy-vline 
WA_DISMPOCX_STR-AEDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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