ABAP Select data from SAP table ESH_S_IF_DCB_DATA_ELEMENT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_S_IF_DCB_DATA_ELEMENT
*  INTO TABLE @DATA(IT_ESH_S_IF_DCB_DATA_ELEMENT2).
*--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_ESH_S_IF_DCB_DATA_ELEMENT INDEX 1 INTO DATA(WA_ESH_S_IF_DCB_DATA_ELEMENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_S_IF_DCB_DATA_ELEMENT>-DATA_ELEMENT_ID = 1.
<ESH_S_IF_DCB_DATA_ELEMENT>-DOMNAME = 1.
<ESH_S_IF_DCB_DATA_ELEMENT>-DATATYPE = 1.
<ESH_S_IF_DCB_DATA_ELEMENT>-INTTYPE = 1.
<ESH_S_IF_DCB_DATA_ELEMENT>-LENG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_S_IF_DCB_DATA_ELEMENT-INTLEN, sy-vline,
  WA_ESH_S_IF_DCB_DATA_ELEMENT-DECIMALS, sy-vline,
  WA_ESH_S_IF_DCB_DATA_ELEMENT-LOWERCASE, sy-vline,
  WA_ESH_S_IF_DCB_DATA_ELEMENT-CONVERSION, sy-vline,
  WA_ESH_S_IF_DCB_DATA_ELEMENT-OUTPUTLEN, sy-vline,
  WA_ESH_S_IF_DCB_DATA_ELEMENT-SIGNFLAG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_S_IF_DCB_DATA_ELEMENT 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_ESH_S_IF_DCB_DATA_ELEMENT 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_ESH_S_IF_DCB_DATA_ELEMENT INTO WA_ESH_S_IF_DCB_DATA_ELEMENT.


*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
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_ESH_S_IF_DCB_DATA_ELEMENT-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_S_IF_DCB_DATA_ELEMENT-DATATYPE.
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_ESH_S_IF_DCB_DATA_ELEMENT_STR, 
DATA_ELEMENT_ID TYPE STRING,
DOMNAME TYPE STRING,
DATATYPE TYPE STRING,
INTTYPE TYPE STRING,
LENG TYPE STRING,
INTLEN TYPE STRING,
DECIMALS TYPE STRING,
LOWERCASE TYPE STRING,
CONVERSION TYPE STRING,
OUTPUTLEN TYPE STRING,
SIGNFLAG TYPE STRING,
FIXED_UOM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_S_IF_DCB_DATA_ELEMENT_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_ESH_S_IF_DCB_DATA_ELEMENT_STR-DATA_ELEMENT_ID sy-vline 
WA_ESH_S_IF_DCB_DATA_ELEMENT_STR-DOMNAME sy-vline 
WA_ESH_S_IF_DCB_DATA_ELEMENT_STR-DATATYPE sy-vline 
WA_ESH_S_IF_DCB_DATA_ELEMENT_STR-INTTYPE sy-vline 
WA_ESH_S_IF_DCB_DATA_ELEMENT_STR-LENG sy-vline 
WA_ESH_S_IF_DCB_DATA_ELEMENT_STR-INTLEN sy-vline 
WA_ESH_S_IF_DCB_DATA_ELEMENT_STR-DECIMALS sy-vline 
WA_ESH_S_IF_DCB_DATA_ELEMENT_STR-LOWERCASE sy-vline 
WA_ESH_S_IF_DCB_DATA_ELEMENT_STR-CONVERSION sy-vline 
WA_ESH_S_IF_DCB_DATA_ELEMENT_STR-OUTPUTLEN sy-vline 
WA_ESH_S_IF_DCB_DATA_ELEMENT_STR-SIGNFLAG sy-vline 
WA_ESH_S_IF_DCB_DATA_ELEMENT_STR-FIXED_UOM sy-vline      INTO ld_text SEPARATED BY SPACE.

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