ABAP Select data from SAP table CDIETGROUP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CDIETGROUP
*  INTO TABLE @DATA(IT_CDIETGROUP2).
*--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_CDIETGROUP INDEX 1 INTO DATA(WA_CDIETGROUP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CDIETGROUP>-MANDT = 1.
<CDIETGROUP>-DIETGROUPINTERNALID = 1.
<CDIETGROUP>-DIETGROUP = 1.
<CDIETGROUP>-DIETGROUPPRIMARYIDFGDESC = 1.
<CDIETGROUP>-DIETGROUPSECONDARYIDFGDESC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CDIETGROUP-DIETGROUPCREATEDBYUSER, sy-vline,
  WA_CDIETGROUP-DIETGROUPCREATEDBYUSERNAME, sy-vline,
  WA_CDIETGROUP-DIETGROUPCHANGEDBYUSER, sy-vline,
  WA_CDIETGROUP-DIETGROUPCHANGEDBYUSERNAME, sy-vline,
  WA_CDIETGROUP-DIETGROUPCREATIONDATE, sy-vline,
  WA_CDIETGROUP-DIETGROUPCHANGEDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CDIETGROUP 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_CDIETGROUP 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_CDIETGROUP INTO WA_CDIETGROUP.


*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 DIETGROUPINTERNALID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CDIETGROUP-DIETGROUPINTERNALID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDIETGROUP-DIETGROUPINTERNALID.
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_CDIETGROUP_STR, 
MANDT TYPE STRING,
DIETGROUPINTERNALID TYPE STRING,
DIETGROUP TYPE STRING,
DIETGROUPPRIMARYIDFGDESC TYPE STRING,
DIETGROUPSECONDARYIDFGDESC TYPE STRING,
DIETGROUPCREATEDBYUSER TYPE STRING,
DIETGROUPCREATEDBYUSERNAME TYPE STRING,
DIETGROUPCHANGEDBYUSER TYPE STRING,
DIETGROUPCHANGEDBYUSERNAME TYPE STRING,
DIETGROUPCREATIONDATE TYPE STRING,
DIETGROUPCHANGEDATE TYPE STRING,
DIETGROUPHEADERSTATUS TYPE STRING,
DIETGROUPHEADERSTATUSDESC TYPE STRING,
DIETGROUPAUTHZNGROUP TYPE STRING,
SPECIFICATIONAUTHZNGROUPDESC TYPE STRING,
DIETGROUPTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CDIETGROUP_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_CDIETGROUP_STR-MANDT sy-vline 
WA_CDIETGROUP_STR-DIETGROUPINTERNALID sy-vline 
WA_CDIETGROUP_STR-DIETGROUP sy-vline 
WA_CDIETGROUP_STR-DIETGROUPPRIMARYIDFGDESC sy-vline 
WA_CDIETGROUP_STR-DIETGROUPSECONDARYIDFGDESC sy-vline 
WA_CDIETGROUP_STR-DIETGROUPCREATEDBYUSER sy-vline 
WA_CDIETGROUP_STR-DIETGROUPCREATEDBYUSERNAME sy-vline 
WA_CDIETGROUP_STR-DIETGROUPCHANGEDBYUSER sy-vline 
WA_CDIETGROUP_STR-DIETGROUPCHANGEDBYUSERNAME sy-vline 
WA_CDIETGROUP_STR-DIETGROUPCREATIONDATE sy-vline 
WA_CDIETGROUP_STR-DIETGROUPCHANGEDATE sy-vline 
WA_CDIETGROUP_STR-DIETGROUPHEADERSTATUS sy-vline 
WA_CDIETGROUP_STR-DIETGROUPHEADERSTATUSDESC sy-vline 
WA_CDIETGROUP_STR-DIETGROUPAUTHZNGROUP sy-vline 
WA_CDIETGROUP_STR-SPECIFICATIONAUTHZNGROUPDESC sy-vline 
WA_CDIETGROUP_STR-DIETGROUPTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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