ABAP Select data from SAP table DDELEMENTINFO into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DDELEMENTINFO
*  INTO TABLE @DATA(IT_DDELEMENTINFO2).
*--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_DDELEMENTINFO INDEX 1 INTO DATA(WA_DDELEMENTINFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DDELEMENTINFO>-TABNAME = 1.
<DDELEMENTINFO>-ALIAS = 1.
<DDELEMENTINFO>-TABTYPE = 1.
<DDELEMENTINFO>-VIEWENTITY = 1.
<DDELEMENTINFO>-FIELDNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DDELEMENTINFO-FIELD_ALIAS, sy-vline,
  WA_DDELEMENTINFO-IS_CLIENT_COLUMN, sy-vline,
  WA_DDELEMENTINFO-TABNAME_RES, sy-vline,
  WA_DDELEMENTINFO-ROLLNAME_RES, sy-vline,
  WA_DDELEMENTINFO-FIELDNAME_RES, sy-vline,
  WA_DDELEMENTINFO-DATATYPE_RES, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DDELEMENTINFO 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_DDELEMENTINFO 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_DDELEMENTINFO INTO WA_DDELEMENTINFO.


*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 DATATYPE_RES
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_DDELEMENTINFO-DATATYPE_RES
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DDELEMENTINFO-DATATYPE_RES.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTYPE, internal->external for field DATATYPEDD
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_DDELEMENTINFO-DATATYPEDD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DDELEMENTINFO-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_DDELEMENTINFO_STR, 
TABNAME TYPE STRING,
ALIAS TYPE STRING,
TABTYPE TYPE STRING,
VIEWENTITY TYPE STRING,
FIELDNAME TYPE STRING,
FIELD_ALIAS TYPE STRING,
IS_CLIENT_COLUMN TYPE STRING,
TABNAME_RES TYPE STRING,
ROLLNAME_RES TYPE STRING,
FIELDNAME_RES TYPE STRING,
DATATYPE_RES TYPE STRING,
LENG_RES TYPE STRING,
DECIMALS_RES 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,
LIT_VALUE TYPE STRING,
LIT_EXPR TYPE STRING,
DOMNAME TYPE STRING,
FIXVALUE TYPE STRING,
FIXVALUE_TEXT TYPE STRING,
CASE_EXPR TYPE STRING,
EXPR_S TYPE STRING,
FUNC_KIND TYPE STRING,
STDFUNC TYPE STRING,
STDFUNC_S TYPE STRING,
STDFUNC_EXPR TYPE STRING,
PREDEFFUNC TYPE STRING,
PREDEFFUNC_S TYPE STRING,
PREDEFFUNC_EXPR TYPE STRING,
ARITHMETIC_EXPR TYPE STRING,
PARAMETERNAME TYPE STRING,
RELEVANT_4_GROUP_BY TYPE STRING,
DDLNAME_EXTEND TYPE STRING,
PATH_ENDCOL TYPE STRING,
SESSION_VAR_NAME TYPE STRING,
SIGNFLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DDELEMENTINFO_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_DDELEMENTINFO_STR-TABNAME sy-vline 
WA_DDELEMENTINFO_STR-ALIAS sy-vline 
WA_DDELEMENTINFO_STR-TABTYPE sy-vline 
WA_DDELEMENTINFO_STR-VIEWENTITY sy-vline 
WA_DDELEMENTINFO_STR-FIELDNAME sy-vline 
WA_DDELEMENTINFO_STR-FIELD_ALIAS sy-vline 
WA_DDELEMENTINFO_STR-IS_CLIENT_COLUMN sy-vline 
WA_DDELEMENTINFO_STR-TABNAME_RES sy-vline 
WA_DDELEMENTINFO_STR-ROLLNAME_RES sy-vline 
WA_DDELEMENTINFO_STR-FIELDNAME_RES sy-vline 
WA_DDELEMENTINFO_STR-DATATYPE_RES sy-vline 
WA_DDELEMENTINFO_STR-LENG_RES sy-vline 
WA_DDELEMENTINFO_STR-DECIMALS_RES sy-vline 
WA_DDELEMENTINFO_STR-FIELDNAMEDD sy-vline 
WA_DDELEMENTINFO_STR-POSITIONDD sy-vline 
WA_DDELEMENTINFO_STR-KEYFLAGDD sy-vline 
WA_DDELEMENTINFO_STR-DATATYPEDD sy-vline 
WA_DDELEMENTINFO_STR-LENGDD sy-vline 
WA_DDELEMENTINFO_STR-DECIMALSDD sy-vline 
WA_DDELEMENTINFO_STR-NULLABLEDD sy-vline 
WA_DDELEMENTINFO_STR-SRS_IDDD sy-vline 
WA_DDELEMENTINFO_STR-LIT_VALUE sy-vline 
WA_DDELEMENTINFO_STR-LIT_EXPR sy-vline 
WA_DDELEMENTINFO_STR-DOMNAME sy-vline 
WA_DDELEMENTINFO_STR-FIXVALUE sy-vline 
WA_DDELEMENTINFO_STR-FIXVALUE_TEXT sy-vline 
WA_DDELEMENTINFO_STR-CASE_EXPR sy-vline 
WA_DDELEMENTINFO_STR-EXPR_S sy-vline 
WA_DDELEMENTINFO_STR-FUNC_KIND sy-vline 
WA_DDELEMENTINFO_STR-STDFUNC sy-vline 
WA_DDELEMENTINFO_STR-STDFUNC_S sy-vline 
WA_DDELEMENTINFO_STR-STDFUNC_EXPR sy-vline 
WA_DDELEMENTINFO_STR-PREDEFFUNC sy-vline 
WA_DDELEMENTINFO_STR-PREDEFFUNC_S sy-vline 
WA_DDELEMENTINFO_STR-PREDEFFUNC_EXPR sy-vline 
WA_DDELEMENTINFO_STR-ARITHMETIC_EXPR sy-vline 
WA_DDELEMENTINFO_STR-PARAMETERNAME sy-vline 
WA_DDELEMENTINFO_STR-RELEVANT_4_GROUP_BY sy-vline 
WA_DDELEMENTINFO_STR-DDLNAME_EXTEND sy-vline 
WA_DDELEMENTINFO_STR-PATH_ENDCOL sy-vline 
WA_DDELEMENTINFO_STR-SESSION_VAR_NAME sy-vline 
WA_DDELEMENTINFO_STR-SIGNFLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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