ABAP Select data from SAP table DDSTDFUNCINFO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DDSTDFUNCINFO
*  INTO TABLE @DATA(IT_DDSTDFUNCINFO2).
*--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_DDSTDFUNCINFO INDEX 1 INTO DATA(WA_DDSTDFUNCINFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DDSTDFUNCINFO>-SIMPLE = 1.
<DDSTDFUNCINFO>-SELLIST = 1.
<DDSTDFUNCINFO>-HAVING = 1.
<DDSTDFUNCINFO>-STDFUNC = 1.
<DDSTDFUNCINFO>-TABNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DDSTDFUNCINFO-ALIAS, sy-vline,
  WA_DDSTDFUNCINFO-TABTYPE, sy-vline,
  WA_DDSTDFUNCINFO-VIEWENTITY, sy-vline,
  WA_DDSTDFUNCINFO-FIELDNAMEDD, sy-vline,
  WA_DDSTDFUNCINFO-POSITIONDD, sy-vline,
  WA_DDSTDFUNCINFO-KEYFLAGDD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DDSTDFUNCINFO 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_DDSTDFUNCINFO 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_DDSTDFUNCINFO INTO WA_DDSTDFUNCINFO.


*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 DTYPE, internal->external for field DATATYPEDD
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_DDSTDFUNCINFO-DATATYPEDD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DDSTDFUNCINFO-DATATYPEDD.
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_DDSTDFUNCINFO_STR, 
SIMPLE TYPE STRING,
SELLIST TYPE STRING,
HAVING TYPE STRING,
STDFUNC TYPE STRING,
TABNAME TYPE STRING,
ALIAS TYPE STRING,
TABTYPE TYPE STRING,
VIEWENTITY TYPE STRING,
FIELDNAMEDD TYPE STRING,
POSITIONDD TYPE STRING,
KEYFLAGDD TYPE STRING,
DATATYPEDD TYPE STRING,
LENGDD TYPE STRING,
DECIMALSDD TYPE STRING,
NULLABLEDD TYPE STRING,
SRS_IDDD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DDSTDFUNCINFO_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_DDSTDFUNCINFO_STR-SIMPLE sy-vline 
WA_DDSTDFUNCINFO_STR-SELLIST sy-vline 
WA_DDSTDFUNCINFO_STR-HAVING sy-vline 
WA_DDSTDFUNCINFO_STR-STDFUNC sy-vline 
WA_DDSTDFUNCINFO_STR-TABNAME sy-vline 
WA_DDSTDFUNCINFO_STR-ALIAS sy-vline 
WA_DDSTDFUNCINFO_STR-TABTYPE sy-vline 
WA_DDSTDFUNCINFO_STR-VIEWENTITY sy-vline 
WA_DDSTDFUNCINFO_STR-FIELDNAMEDD sy-vline 
WA_DDSTDFUNCINFO_STR-POSITIONDD sy-vline 
WA_DDSTDFUNCINFO_STR-KEYFLAGDD sy-vline 
WA_DDSTDFUNCINFO_STR-DATATYPEDD sy-vline 
WA_DDSTDFUNCINFO_STR-LENGDD sy-vline 
WA_DDSTDFUNCINFO_STR-DECIMALSDD sy-vline 
WA_DDSTDFUNCINFO_STR-NULLABLEDD sy-vline 
WA_DDSTDFUNCINFO_STR-SRS_IDDD sy-vline      INTO ld_text SEPARATED BY SPACE.

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