ABAP Select data from SAP table DITCA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DITCA
*  INTO TABLE @DATA(IT_DITCA2).
*--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_DITCA INDEX 1 INTO DATA(WA_DITCA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DITCA>-CLIENT = 1.
<DITCA>-ISMNR = 1.
<DITCA>-ISMVR = 1.
<DITCA>-CACNT = 1.
<DITCA>-ITEMNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DITCA-CACAT, sy-vline,
  WA_DITCA-CAGRP, sy-vline,
  WA_DITCA-CACOD, sy-vline,
  WA_DITCA-PRCNT, sy-vline,
  WA_DITCA-OPCNT, sy-vline,
  WA_DITCA-ERNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DITCA 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_DITCA 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_DITCA INTO WA_DITCA.


*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_DITCA-ISMNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DITCA-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_DITCA_STR, 
CLIENT TYPE STRING,
ISMNR TYPE STRING,
ISMVR TYPE STRING,
CACNT TYPE STRING,
ITEMNR TYPE STRING,
CACAT TYPE STRING,
CAGRP TYPE STRING,
CACOD TYPE STRING,
PRCNT TYPE STRING,
OPCNT TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
FLGDEL TYPE STRING,
ITCASEL TYPE STRING,
TXTCAGRP TYPE STRING,
TXTCACOD TYPE STRING,
FLGUPD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DITCA_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_DITCA_STR-CLIENT sy-vline 
WA_DITCA_STR-ISMNR sy-vline 
WA_DITCA_STR-ISMVR sy-vline 
WA_DITCA_STR-CACNT sy-vline 
WA_DITCA_STR-ITEMNR sy-vline 
WA_DITCA_STR-CACAT sy-vline 
WA_DITCA_STR-CAGRP sy-vline 
WA_DITCA_STR-CACOD sy-vline 
WA_DITCA_STR-PRCNT sy-vline 
WA_DITCA_STR-OPCNT sy-vline 
WA_DITCA_STR-ERNAM sy-vline 
WA_DITCA_STR-ERDAT sy-vline 
WA_DITCA_STR-ERTIM sy-vline 
WA_DITCA_STR-AENAM sy-vline 
WA_DITCA_STR-AEDAT sy-vline 
WA_DITCA_STR-AETIM sy-vline 
WA_DITCA_STR-FLGDEL sy-vline 
WA_DITCA_STR-ITCASEL sy-vline 
WA_DITCA_STR-TXTCAGRP sy-vline 
WA_DITCA_STR-TXTCACOD sy-vline 
WA_DITCA_STR-FLGUPD sy-vline      INTO ld_text SEPARATED BY SPACE.

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