ABAP Select data from SAP table DAICT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DAICT
*  INTO TABLE @DATA(IT_DAICT2).
*--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_DAICT INDEX 1 INTO DATA(WA_DAICT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DAICT>-CXN = 1.
<DAICT>-CXND = 1.
<DAICT>-MNO = 1.
<DAICT>-FON = 1.
<DAICT>-TON = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DAICT-CP, sy-vline,
  WA_DAICT-PNT01, sy-vline,
  WA_DAICT-CPX01, sy-vline,
  WA_DAICT-CPY01, sy-vline,
  WA_DAICT-PNT02, sy-vline,
  WA_DAICT-CPX02, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DAICT 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_DAICT 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_DAICT INTO WA_DAICT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DAICT_STR, 
CXN TYPE STRING,
CXND TYPE STRING,
MNO TYPE STRING,
FON TYPE STRING,
TON TYPE STRING,
CP TYPE STRING,
PNT01 TYPE STRING,
CPX01 TYPE STRING,
CPY01 TYPE STRING,
PNT02 TYPE STRING,
CPX02 TYPE STRING,
CPY02 TYPE STRING,
PNT03 TYPE STRING,
CPX03 TYPE STRING,
CPY03 TYPE STRING,
PNT04 TYPE STRING,
CPX04 TYPE STRING,
CPY04 TYPE STRING,
PNT05 TYPE STRING,
CPX05 TYPE STRING,
CPY05 TYPE STRING,
PNT06 TYPE STRING,
CPX06 TYPE STRING,
CPY06 TYPE STRING,
PNT07 TYPE STRING,
CPX07 TYPE STRING,
CPY07 TYPE STRING,
PNT08 TYPE STRING,
CPX08 TYPE STRING,
CPY08 TYPE STRING,
PNT09 TYPE STRING,
CPX09 TYPE STRING,
CPY09 TYPE STRING,
PNT10 TYPE STRING,
CPX10 TYPE STRING,
CPY10 TYPE STRING,
PNT11 TYPE STRING,
CPX11 TYPE STRING,
CPY11 TYPE STRING,
PNT12 TYPE STRING,
CPX12 TYPE STRING,
CPY12 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DAICT_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_DAICT_STR-CXN sy-vline 
WA_DAICT_STR-CXND sy-vline 
WA_DAICT_STR-MNO sy-vline 
WA_DAICT_STR-FON sy-vline 
WA_DAICT_STR-TON sy-vline 
WA_DAICT_STR-CP sy-vline 
WA_DAICT_STR-PNT01 sy-vline 
WA_DAICT_STR-CPX01 sy-vline 
WA_DAICT_STR-CPY01 sy-vline 
WA_DAICT_STR-PNT02 sy-vline 
WA_DAICT_STR-CPX02 sy-vline 
WA_DAICT_STR-CPY02 sy-vline 
WA_DAICT_STR-PNT03 sy-vline 
WA_DAICT_STR-CPX03 sy-vline 
WA_DAICT_STR-CPY03 sy-vline 
WA_DAICT_STR-PNT04 sy-vline 
WA_DAICT_STR-CPX04 sy-vline 
WA_DAICT_STR-CPY04 sy-vline 
WA_DAICT_STR-PNT05 sy-vline 
WA_DAICT_STR-CPX05 sy-vline 
WA_DAICT_STR-CPY05 sy-vline 
WA_DAICT_STR-PNT06 sy-vline 
WA_DAICT_STR-CPX06 sy-vline 
WA_DAICT_STR-CPY06 sy-vline 
WA_DAICT_STR-PNT07 sy-vline 
WA_DAICT_STR-CPX07 sy-vline 
WA_DAICT_STR-CPY07 sy-vline 
WA_DAICT_STR-PNT08 sy-vline 
WA_DAICT_STR-CPX08 sy-vline 
WA_DAICT_STR-CPY08 sy-vline 
WA_DAICT_STR-PNT09 sy-vline 
WA_DAICT_STR-CPX09 sy-vline 
WA_DAICT_STR-CPY09 sy-vline 
WA_DAICT_STR-PNT10 sy-vline 
WA_DAICT_STR-CPX10 sy-vline 
WA_DAICT_STR-CPY10 sy-vline 
WA_DAICT_STR-PNT11 sy-vline 
WA_DAICT_STR-CPX11 sy-vline 
WA_DAICT_STR-CPY11 sy-vline 
WA_DAICT_STR-PNT12 sy-vline 
WA_DAICT_STR-CPX12 sy-vline 
WA_DAICT_STR-CPY12 sy-vline      INTO ld_text SEPARATED BY SPACE.

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